www.geode.co.uk

ProductData Sheet

PDS-RDL-0911/04

RDL-STDRDL-MDLRDL-AC

PRODUCT DATA SHEET FOR

REMOTE DATA LOGGER - RDL

Features• Remote Controlled device using standard or GSM mobile modems.• Alarm Monitoring: Transmission to computer and/or by SMS text

message to mobile phone. Can store 6,440 samples.• Logging: Can store 111,350 samples.• 8 Universal Inputs: Software configurable.• 3 Fast Pulse Counting Inputs for metering applications (RDL-MDL model only).• Access Control using standard PS/2 keypad (RDL-AC model only).• LED Indication of status and active alarms.• Battery backup (20 days), maintaining internal clock. Charged when power is available.• Flash Memory ensures settings are not lost even if battery runs flat.• SQL Database used for easy export to other applications, e.g. Microsoft Excel, Access.• 2 Relay Outputs can be controlled by alarm state, load shedding or manually by SMS message.• Load Shedding and Maximum Demand Limiting

GeneralRDL Remote Data Logger has been designed to log data such as temperature, humidity,pressure (etc.) on both local and remote sites. The RDL can be connected to a standardmodem or to a GSM mobile modem, allowing it to be used in truly remote areas.

The following diagram shows the main components of an RDL system:

Up to 111,350 samples can be stored in the device before being uploaded to a SQLdatabase managed by Microsoft SQL Server (Desktop Edition). You can view the logged

This document was prepared using OpenOffice.org, an open-source Office Suite.Windows and Windows XP are trademarks of Microsoft Corporation.

© 2004 Geode Software Ltd.10 Essington, North Tawton, Devon EX20 2EZ. United Kingdom.Tel: +44 (0)1837 89284

Related DocumentsPDS-RDLSW-02 – RDL Engineering Guide

RDL Data Sheet 1

General

data graphically using the “RDLView” application. Both the configuration and viewsoftware tools are intuitive, easy to use and are capable of managing multiple RDLdevices from one computer. If you have any problems using the software, an extensiveengineering guide is available to help (PDS-RDLSW-02).

Depending on the model, a maximum of five or eight inputs are available formeasurement. Each is capable of measuring a wide variety of input types; 0..10V,4..20mA, Temperature NTC10, PT1000, Ohms and dry contact (open collector) digital.

The RDL-MDL version provides maximum demand limiting and load shedding capabilityusing its pulse counting inputs and relay outputs. Three inputs are capable of countingfast pulses down to 5ms and up to 50 pulses per second. The internal battery backupcircuit not only maintains the current meter values during a power failure but alsocontinues to count further pulses, ensuring no pulses are lost. You can define four timeperiods per day, each using a different consumption limit.

Order CodesRDL-STD - 8 Input Logger & MonitorRDL-MDL - 5 Input Logger & Monitor plus 3 Pulse Counters for Load Shedding & Demand LimitingRDL-AC - 8 Input Logger & Monitor with Access Control LoggingRDL-PS-UK - Wall outlet power supply. 230VAC to 9V Power Supply (optional)RDL-SW - RDL Software Tools for Windows XP CD-ROM

The PC software (RDL-SW) is required in order to configure the RDL, view alarms andlogged data. However, you can manage many RDL devices from one computer runningthe software. If you intend to use more than one computer at once (connecting to differentsites), you should purchase a copy of the software for each computer.

The power supply (RDL-PS-UK) plugs into the mains supply and contains a transformer(output 9V DC unregulated at 300mA), thermal cut-out fuse and a standard 2.1 x 5.5 x12mm female connector (+ve centre polarity) for connecting to the RDL. USA, Australian,European and other models are available on request. On all models, a length of 1.8metres of wire is provided.

InstallationInspection

Inspect the packaging for any damage. If damaged, notify the carrier immediately. Unpackand inspect the product for damage. Return any damaged products.

PrecautionsMake all wiring connections according to electrical wiring diagram, national and localelectrical safety standards.

Static Electricity PrecautionsAlways follow static prevention procedures when installing electronic equipment. Staticelectricity can build up to high voltage that can damage electronic components. Themicroprocessor in this unit is very sensitive to static electricity and can be damaged if thefollowing precautions are not followed:

• Work in an area free from static• Discharge static electricity by touching a known electrically earthed object such as an

electrical panel or computer casing.• Use a wrist strap connected to earth if you need to handle the unit's printed circuit

board.

Power Supply Wiring PrecautionsThe product can be powered from the optional 9V,300mA supply (recommended) or froma supply wired to the terminals provided. If the supply is wired to the terminals, do notconnect the optional supply and follow the precautions below.

This product contains a non-isolated half-wave rectifier power supply. All internal voltagesare referenced to the 0V terminal of the power supply. This device must not be poweredby a transformer used to power other devices that use a non-isolated full-wave rectifier

2 RDL Data Sheet

Installation

power supply.

The power supply must be capable of supplying at least 3VA and must be within the range7..40VDC or 7..24VAC. Connect the transformer frame and 0V terminal to earth: see“Connecting the Power Supply“ on page 6.

LocationThe product is suitable for use indoors only. When you are selecting a location to mountthe unit, please make sure the environment does not contain:

• Excessive moisture or solvent vapours• Corrosive or explosive fumes• High levels of vibration• Extremes of temperature (below 0°C or above 50°C)• Extremes of humidity (below 5% or above 95%, non-condensing)• Electrical machinery carrying high currents or voltages

In addition, if the unit must be located near electrical wiring carrying high currents, allow atleast 150mm (6”) clearance between this and any product wiring.

MountingThis product should be mounted to standard 35mm DIN rail. See page 15 for dimensions.A spring clip is used to secure the unit to the DIN rail. To mount the unit:

• Leave enough room around the product to allow for the sensor, power supply andoutput wiring.

• Position the product with the spring clip at the bottom (terminal 1 is bottom-left).• Locate the product on the top of the DIN rail and hold it there while you pull down on

the spring clip. The unit should swing easily onto the DIN rail.• Release the spring clip and check the product is securely fixed to the rail.

RDL Data Sheet 3

Installation

Terminal ConnectionsThe diagram below shows the terminal connections provided. Each terminal accepts onesolid wire of 2.5mm2. Not all terminals may be present, depending on the model.

The RDL-STD model contains eight Universal Inputs, marked “INPUT 1” to “INPUT 8”.Each of these can be configured using the software to be current, voltage, resistive ordigital. There are no Pulse Counting Inputs on this model.

The RDL-MDL model contains five Universal Inputs as above, but the last three inputs arereplaced by three Pulse Counting Inputs marked “PULSE 1” to “PULSE 3”. This model isintended for monitoring electricity, water and gas consumption and can provide maximumdemand limiting and load shedding.

The RDL-AC model contains eight Universal Inputs as the RDL-STD model. No PulseCounting Inputs are present. This model is also fitted with terminals 18-21 for use with thenumeric keypad supplied with the product. The keypad is used to enter access codes,which the unit will log and can be programmed to operate the relay outputs.

General Wiring InformationAnalogue (current, voltage and resistive) inputs should be connected using screenedcables. Digital inputs can be connected using non-screened twisted pair cable if desired,although screened cable will reduce the noise passed to other wiring.

The screen should be connected to earth at one end of the wire. Keep the wires emergingfrom screened cables as short as possible to reduce the interference caused by noise.

Note: The screen should only be connected to earth at one end. If you need to connectmultiple screens, use a terminal block to join the screens together, then wire this to earth.

Connecting Universal InputsThe RDL accepts the following types of input at each Universal Input terminal (1-16 or 1-10 depending on the model).

4 RDL Data Sheet

Installation

• AnalogueType Sensor Range ResolutionResistive NTC10 -40..120°C 0.1°CResistive PT1000 -40..120°C 0.1°CResistive 0..120kΩ 0.5% of valueVoltage 0..10V 3mVCurrent 4..20mA 5μA

• Digital (Voltage-Free Contact)

The type of sensor is set using the software tool “RDLConfig” as explained in theEngineering Guide. When wiring the sensor cables, connect the positive end to the inputterminal (1,3,5,7,9,11,13 or 15) and the other end to the corresponding 0V terminal(2,4,6,8,10,12 or 14).

If the 4..20mA input type is used, the device should be capable of driving up to 10V intothe input. This figure is quoted as the saturation voltage. If this is less than 10V, the RDLwill not be able to measure the full scale up to 20mA and will require an external resistorto be fitted across the terminals to prevent voltage saturation.

Note: The digital input type is measured as a resistance. Anything below 6kΩ is measuredas “Off”, above 15kΩ as “On”.

Connecting Pulse Counting Inputs (RDL-MDL model only)The RDL-MDL model is capable of counting fast pulses and is intended to be connectedto metering equipment with an open collector or volt-free contact output. Three inputs areprovided for electricity, water and gas.

The RDL continues to count pulses even during power failure when the unit is running onbattery backup power. The counter values are maintained in battery-backed RAM andwhen running on main power, the unit automatically calculates the current value of themeter and the rate of consumption in order to perform load shedding and maximumdemand limiting.

When wiring the Pulse Counting Inputs, connect the positive end from the meter to theinput terminal (11,13 or 15) and the other end to the corresponding 0V terminal (10,12 or14).

Note: You do not need to use screened cable for the Pulse Counting Inputs, but doing sowill reduce electrical noise transmitted to nearby equipment.

See the specifications section for limits on pulse rate and the minimum pulse width thatcan be detected.

Connecting the Access Control Keypad (RDL-AC model only)Terminals 18-21 are used for wiring a standard PS/2 numeric keypad. A PS/2 socket isprovided with this model for wiring to the terminals. The wires are colour coded andshould be wired as follows:

Terminal 18 Red (+5V)Terminal 19 White (CLOCK)Terminal 20 Green (DATA)Terminal 21 Black (0V)

Connecting Relay OutputsTwo changeover type relays are provided for switching output loads. The relays are ratedas follows:

RDL Data Sheet 5

Installation

AC Load DC LoadMaximum Switching Power 2880 VA 360 WMaximum Switching Voltage 50 VAC 50 VDCMaximum Switching Current 5 A 5 ALife Expectancy 10 million operations / 100,000 at maximum loadContact Material Silver Tin Indium Oxide (0.1Ω maximum resistance)

You must not exceed the rated current, voltage or power.

Ratings above are for a resistive load only. For inductive loads such as fans, pumps andother motors, de-rate the switching power by a factor of five, i.e. 570 VA for AC loads, or72W for DC loads.

When wiring the relays as “make or break” switches, connect the load to the COMterminal (35 or 39) and the “live” supply to the NO (normally open terminal 34 or 38) orNC (normally closed terminal 33 or 37).

Note: Consider whether you need the circuit to be made if the power to the unit fails. Ifso, you should wire to the NC terminal. Otherwise connect the supply to the NOterminal. The relay operation can be programmed using RDLConfig.

Connecting a Modem or ComputerThe product is designed to connect to a modem or directly to your computer. A 9-way D-type male connector is fitted to the unit for this. When connecting to a modem, use thecable provided by the modem manufacturer, or another similar “straight through” cable.To connect the RDL to the computer requires a different sort of cable called a null-modemcable. This cable should have a 9-way D-type female connector on both ends. Internally,the cable should look like this:

The CTS and RTS signals are connected together in the RDL, The signals used by RDLare TXD, RXD, DTR, DSR and GND.

Connecting the Power SupplyPower can be supplied to the product in one of two ways. There is a dedicated 2.1mmstandard power socket fitted to the unit that accepts the optional power supply (RDL-PS-UK). This power supply is internally fused with a thermal cut-out, rated at 9V DC(unregulated), 300mA and fitted with a 2.1 x 5.5 x 12mm female connector (+ve centrepolarity).

Alternatively, you can connect power to the product by wiring to terminals 27 and 28. Todo this, make sure terminal 27 (0V) is connected to earth, then proceed as follows:

1. Connect power ground wiring to terminal 27 (0V).2. Connect power 24VAC wiring to terminal 28 (24VAC).

Note: When power is supplied to the unit using terminals 27 and 28, do not connect thewall power supply at the same time because current will flow from one supply to theother and the product can become damaged.

6 RDL Data Sheet

Installation

Although the product was designed with a supply voltage of 24VAC in mind, the RDLaccepts a wide input voltage range of 7 to 24VAC or 7 to 40VDC. The DC supply allowsthe product to be used in automotive applications:

RDL Data Sheet 7

Functional Description

Functional DescriptionInputs

The RDL-STD contains eight input channels. Each input can be configured to measurevoltage, current, resistive or digital by using the software program RDLConfig.

The unit samples all eight inputs in turn and applies dynamic noise reduction (DNR) ifthere is noise picked up on the input.

Note: Using the DNR feature is not a substitute for good quality wiring because the inputis not as responsive when DNR is used and bad quality wiring can pass noise to otherinputs and to other equipment. Always use screened cable and keep the unscreened endsas short as possible. Connect the screen to earth at one end only.

Each input can be configured to provide alarms based on upper and lower limits, and canbe sampled at a fixed interval or on value change for logging.

Pulse Counting / Metering InputsThe pulse-counting inputs are designed to be connected to pulse output meteringequipment (such as electricity, gas and water). Each pulse module accumulates pulses tomeasure the total energy / water volume consumed. In addition the RDL calculates theinstantaneous power / flow rate. The RDL contains a fast timer that is used to calculaterate / flow accurate to 0.1%.

Each pulse counting input can provide alarms by monitoring the meter value and currentconsumption rate. These two figures can be logged by the unit to record the consumptionlevel over time.

Access ControlThe unit can be programmed to accept up to ten access control codes of four digits each.For each code, the unit can be programmed to operate either or both of its relays. Inaddition, the code is time-stamped and logged.

The code is entered using a standard PS/2 keypad attached to the unit. The code shouldbe tapped out on the keypad, followed by the ENTER key. While the unit is waiting for thecode to be entered, its LEDs are turned off.

When a valid code is entered, the RUN LED flashes quickly for a few seconds. If a relayhas been selected to operate for the code, it is switched and is energised for a certaintime afterwards (configurable by the user).

If an invalid code is entered, the ALARM LED flashes instead. The code is not logged bythe unit and no relays are switched.

Data LoggingThe device operates a flexible event based logging system. A new log is recorded if thevalue differs from the last recorded value by a configurable threshold and if a certain timeinterval has passed since that time. For example, temperatures may need to be logged ifthe value has changed by 0.5°C and not more frequently then once every minute. Thesethresholds are set using the RDLConfig software.

The unit monitors the memory available for new logs and can automatically dial thecomputer when the logs are 90% filled. This allows the logging to continue without anydata being missed while the computer reads the old values to free up space in memory.

Alarm MonitoringFor each input, a lower and upper limit can be set. To avoid nuisance alarms a dead zonecan be used around these limits. The dead zone is configurable. An additional feature toreduce nuisance alarms is the hold-off timer. If the alarm condition persists for longer thanthe hold-off time, the device recognises the alarm. If not, the alarm is cancelled and notreported.

Two priority levels are provided. High priority alarms are reported to the front-end software

8 RDL Data Sheet

Functional Description

immediately, while the low priority alarms are only reported when the computer is nextconnected. This may be once per day, whenever the logs are full or another high priorityalarm occurs.

An alarm history is maintained of the 6,440 most recent alarms.

When an alarm is acknowledged by a user, the computer will contact the RDL to keep itupdated. The RDL contains a red LED to indicate the alarm condition.

Each alarm can be automatically acknowledged by the device when the alarm clears, orleft for the user to acknowledge at the computer or mobile phone. When the alarm outputis also set to drive a relay, the relay is turned on when the alarm is raised, and only turnedoff when the alarm has cleared and been acknowledged.

Each alarm module contains a configurable text message that is sent to a mobile phoneusing SMS. The alarm can be acknowledged using the mobile phone by replying to theSMS.

Internal ClockThe device receives the time from the front-end computer. The computer software sendsthe time in UTC (GMT) format. This means there is never any confusion about when a logwas taken as a result of the local time zone or if daylight savings are in effect.

The device converts the UTC time format into local time using information suppliedautomatically by the computer. It is able to adjust for daylight savings time (e.g. BST andGMT) automatically.

The internal clock is used to drive a time-schedule containing four switching times. Theseuse the local time and enable demand limiting and load shedding to be programmed forup to four periods per day.

Load SheddingEach pulse counting input is linked to a time schedule. The schedule contains fourswitching times per day, during which different limits for consumption can be defined.

If the current consumption is forecast to exceed the total allowed for the current period,Relay 1 will be switched. If it exceeds a certain factor above this level, Relay 2 can beswitched as well. The factor, time periods and consumption limits in each period are allconfigurable. The following diagram illustrates the load shedding function.

RDL Data Sheet 9

Functional Description

If the product detects that the consumption has already exceeded the limit set for theperiod, the RDL will generate an alarm condition and can operate a relay, implementingmaximum demand limiting.

As well as a maximum consumption per period, the RDL will monitor the instantaneouspower/flow rate and a maximum overall consumption limit. If either of these limits areexceeded, the RDL will generate an alarm condition.

As for all alarm conditions, the RDL can be configured to send the alarm to the computeror a mobile phone. It can also operate one of the relay outputs.

Long Range TimerThe RDL contains a long-range timer that is able to operate the outputs. When the timerexpires, the output is turned on until the timer is reset by using the software or by a digital“high” state on Input 1. You can set the timer period up to a maximum of 1,000 days.

The timer can be used to make or break a power circuit when the timer expires.

IndicationThe RDL contains two lights (LEDs) on the front panel. The green “RUN” LED shows theunit is running and able to communicate with a modem or computer. The other LED is ared LED marked “ALARM” that shows the unit has detected an alarm condition. Thefollowing tables show the meaning of the LEDs.

RUN LEDLED State DescriptionConstant OFF Fault, code being entered, or no power appliedMostly OFF No communications / modem not communicatingFlashing evenly Modem is initialised and readyMostly ON Modem is active (dialling or on-line with computer)Constant ON Hardware fault inside the unitFlashing Quickly Valid code entered (RDL-AC only)

10 RDL Data Sheet

Functional Description

The RUN LED should flicker at first, then settle down so it flashes evenly (50% on, 50%off). This shows the RDL has been able to communicate with the modem.

If the LED is flashing, but mostly OFF, the RDL is trying to communicate with the modembut has not had a response. Test the modem by connecting it to your computer insteadand starting HyperTerminal from the Start menu as described in the Engineering Guide(PDS-RDLSW-02).

ALARM LEDLED State DescriptionConstant OFF No alarm conditions exist (acknowledged)Mostly OFF Alarm has cleared or been acknowledgedMostly ON Internal error detected (e.g. time lost)Constant ON Alarm condition exists (acknowledged)Flashing Quickly Invalid code entered (RDL-AC only)

ModemsThe RDL communicates with the modem using the following parameters:

Data Rate / Speed 38,400 baudNumber of Stop Bits 1 bitParity NoneNumber of Data Bits 8 bitsHandshaking None

In addition, the RDL expects the modem to terminate a phone call if the RS-232 signal“DTR” is set low.

SMS MessagingThe RDL can be connected to a GSM modem, allowing the product to be used in trulyremote places where there are no telephone lines. It can perform data logging, alarmmonitoring or load shedding as usual, but can also (optionally) transmit alarms as SMS(text) messages to your mobile phone.

Again, from your phone you can reply to the alarm message to acknowledge the alarmand can also control the relay outputs manually by sending a text message to the RDL.

To use the RDL in this way, you must have a SIM card with two phone numbers allocatedto it. One is reserved exclusively for voice calls and a second number is used for datacalls. The computer software contacts the RDL using the phone number allocated for datacalls only.

Note: The data transfer rate is much slower when you use a GSM modem (9600 baud).This means it will take longer to transfer the logged data over the mobile network to thecomputer.

Battery LifeAll RDL models contain an internal NiMH rechargeable battery. The battery is chargedautomatically by the unit when power is available. When the power fails, the battery is ableto maintain the internal clock and the pulse counter values for up to 20 days. This is atypical figure at 20°C.

PC Software ToolsThe front-end software is designed for Windows XP. It isintuitive and very easy to use. It can monitor multiple RDLunits across many different remote or local sites. For eachsite the software will program the RDL devices with thephone numbers to be used for dial-back, the types of eachinput (NTC10, PT1000, voltage, current and so on), thecomputer time, alarm limits and logging intervals. This set-

RDL Data Sheet 11

Functional Description

up information is stored in the SQL database on the computer and is downloaded to theRDL.

Each time the RDL dials the computer to report alarms, or upload its logged data, thecomputer transfers the information to the database. The software provided installs theMicrosoft SQL Server Desktop Edition® (MSDE), a free-to-use version of SQL Server2000®. Once the information is stored in the database, any number of tools are availableto view it. For example, Microsoft Excel® can connect to the database and present thelogged data as a graph, or show the alarm history in tabular form. The software providedcontains a program to view the logged data and alarm history as a table of values and candisplay the logged data graphically, with up to six points on the same graph.

12 RDL Data Sheet

Servicing

ServicingThe product is not designed to be repaired in the field. It contains electronic componentsthat are sensitive to static discharge and repair should only be attempted by qualifiedpersonnel in a static-free environment. If you suspect a fault has occurred in the product,please use the check-list below before contacting your supplier.

1. Is power supplied to the correct terminals? Measure voltage across terminals 27 and28 using a volt-meter.

2. Does the RUN LED come on? If so, refer to “Indication“ on page 10. If the LED is ONconstantly the unit has identified a hardware fault. Contact your sales office.

3. If the unit does not communicate through the modem, connect the unit to the computerusing a 9-way D-type null-modem cable (female at both ends). Use the RDLConfigsoftware program to enable the local port and create a new site that uses this port (seethe Engineering Guide). Does the RUN LED flash evenly? If so, you should be able touse the configuration program to check the unit communicates and locate the problem.If not, there is a problem with the communications.

4. If you can communicate with the unit using the RDLConfig software, check theconfiguration shown by the program. If you suspect a fault with the inputs, check theinput type has been set correctly and look at the value reported by the unit. You candisable dynamic noise reduction (DNR) to make the unit more responsive. Check theoutputs have not been manually overridden.

Fuse ReplacementThe fuse provides over-current protection for the product. The fuse may blow if there is ahardware fault. To examine the fuse, do the following:

1. Turn off the supply power to the unit.2. Make sure you isolate the output relays. This is very important because there may

be live voltages present at the terminals.3. Open the cover by pushing in the two black plastic clips on either side of the unit. This

releases the front section.4. Locate the fuse holder. This is a vertically mounted component that is opened using a

screwdriver.5. Check the fuse for continuity by measuring its resistance. If the fuse needs to be

replaced, use the same type and rating (20mm fast blow 1 Amp).6. Replace the cover, making sure the clips click into position.

RDL Data Sheet 13

Specifications

Specifications

Power Supply 7..40V DC7..24V AC (24V AC nominal)2.1mm socket for optional power supply

Operating Temperature 0..50°C

Communications RS-232 9-way male D-type fitted to unit for connecting a modem, GSM modemor computer. Signals used: DTR,DSR,RXD,TXD

Wiring Terminals 2.5mm2 for each signal, power and ground

Power Failure Backup Internal rechargeable NiMH battery maintains the internal clock and pulsecounter values for 20 days. Battery charge is maintained by the device.

Memory 1MB Flash for logged data128kB Flash for firmware (can be updated remotely)4kB RAM for pulse count values, clock, communications

Processor 18MHz 8-bit RISC CPU

Logging Capacity 111,350 samples. Logs any input, pulse rate, counted value

Alarm History Last 6,440 entries

Protection Class IP20

Mounting DIN rail

Inputs Software-configurable inputs:Analogue

-40..120°C 0.1°C resolution (PT1000)-40..120°C 0.1°C resolution (NTC10)0..10V 3mV resolution4..20mA 5μA resolution0..120kΩ 0.5% resolution

DigitalVoltage-free contact

Pulse Counting Inputs:Voltage-free contact / open collectorMinimum pulse duration of 5msMaximum rate of 50 pulses per second

Outputs SPDT Relay outputs:Low voltage operation (up to 50V)5A Current Rating2880VA (AC) / 360W (DC) Resistive load570VA (AC) / 72W (DC) Inductive load

Indication Green LED Operation / power is onRed LED Alarm is present

PC RequirementsType Desktop or notebook PC.Microprocessor Pentium III (1GHz minimum) or AMD Athlon (1GHz minimum).Operating System Microsoft Windows XP (Home or Professional).RAM 256MB (minimum), 512MB (recommended).Hard Disk Drive 256MB Free space for software installation.CD ROM Drive For software installation.Video Monitor resolution 1024 x 768 (minimum).Accessories Null-modem serial cable for direct connection to RDL.

Internal/external modem for remote sites.

14 RDL Data Sheet

Dimensions

DimensionsOverall dimensions 156 x 97mm.

WeightRDL-STD 300g

RDL-MDL 300g

RDL-AC 300g

RDL-PS-UK 700g

RDL Data Sheet 15

Cautions• Do not apply any voltages until a qualified technician

has checked the wiring against the job wiring diagramand the product data sheet.

• This device is rated up to 24VAC. Do not exceed therated voltage.

• Check that all wiring to relays is isolated beforeremoving the cover.

• Re-fit the cover (if removed) after installation tocomply with safety requirements.

• Do not exceed the maximum ambient temperatureand humidity.

• Do not interfere with the product's component parts.• The design and performance of this equipment is

subject to improvement and therefore liable to changewithout prior notice.

• Information is given for guidance only and noresponsibility is accepted for the selection orinstallation of products unless information is given bythe Company in writing relating to a specificapplication.

Geode Software Ltd.10 EssingtonNorth TawtonDevon, EX20 2EZUnited Kingdom

Telephone +44 (0)1837 89284Facsimilie +44 (0)870 1382373Web site www.geode.co.uk

© 2004 Geode Software Ltd. All Rights Reserved.

16 RDL Data Sheet