2400 Master Clock User’s Manual 3-1 C. Front Panel Figure 11: 2400 Master Clock Front Panel Shown is the front panel of the 2400-R-24. The front panel of the 2400-S-24, 2400-S-120 and 2400- S-240 contain identical features in slightly different positions. All front panels operate identically. Time Display: Displays the time on a sixteen-character liquid crystal display (LCD). Used to prompt the user, and display menu options during programming. Help Key: Used for on-line Help. Help information is viewed on the LCD. See Section C.1, “On-line Help.” Function Keys: Used to activate relays, or to activate other Master Clock features (Digital Clock Messaging, Enable Schedules, etc.). Function Keys have three levels of functionality where the keys are used for different functions, depending upon which mode the Master Clock is in: Normal Mode: Function keys are used to activate relays and messages. This mode supports relay closures to activate external equipment, and closures in conjunction with messages by pressing one Function Key. This is the default mode of operation. Messages Mode: Function keys are used to display Digital Clock Messages. Each Function Key is assigned a particular message, which will display on the digital clocks when the Function Key is pressed. Zones Mode: Used for manual override. Function Keys provide direct control of relays. Each Function Key controls its own relay, by default. This mode is designed to manually disable or enable a relay zone from the front panel. Keypad: Used during programming to move the cursor. Used to navigate through the menu options (UP/DOWN/NEXT/ PREVIOUS). Also used to insert or remove (ADD/ DELETE) data into programming tables. To ADD or DELETE an item, press and hold ADD or DELETE. Mode Button: Used to select mode of operation. Keep pressing this button to scroll through the different modes (Normal, Messages, Zones Mode). Turn keyswitch to scroll through Programming Modes (Schedule Set, Time Set, Program, Miscellaneous). Mode Indicators: Indicates mode of operation by illumination of LED.

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2400 Master Clock Users Manual 3-1

C. Front Panel

Figure 11: 2400 Master Clock Front Panel

Shown is the front panel of the 2400-R-24. The front panel of the 2400-S-24, 2400-S-120 and 2400-S-240 contain identical features in slightly different positions. All front panels operate identically.

Time Display: Displays the time on a sixteen-character liquid crystal display (LCD). Used toprompt the user, and display menu options during programming.

Help Key: Used for on-line Help. Help information is viewed on the LCD. See Section C.1,On-line Help.

Function Keys: Used to activate relays, or to activate other Master Clock features (Digital ClockMessaging, Enable Schedules, etc.). Function Keys have three levels offunctionality where the keys are used for different functions, depending uponwhich mode the Master Clock is in:

Normal Mode: Function keys are used to activate relays and messages. Thismode supports relay closures to activate external equipment, and closures inconjunction with messages by pressing one Function Key. This is the defaultmode of operation.

Messages Mode: Function keys are used to display Digital Clock Messages.Each Function Key is assigned a particular message, which will display on thedigital clocks when the Function Key is pressed.

Zones Mode: Used for manual override. Function Keys provide direct controlof relays. Each Function Key controls its own relay, by default. This mode isdesigned to manually disable or enable a relay zone from the front panel.

Keypad: Used during programming to move the cursor. Used tonavigate through the menu options (UP/DOWN/NEXT/PREVIOUS). Also used to insert or remove (ADD/DELETE) data into programming tables. To ADD orDELETE an item, press and hold ADD or DELETE.

Mode Button: Used to select mode of operation. Keep pressing this button to scroll through thedifferent modes (Normal, Messages, Zones Mode). Turn keyswitch to scrollthrough Programming Modes (Schedule Set, Time Set, Program, Miscellaneous).

Mode Indicators: Indicates mode of operation by illumination of LED.