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TERMINAL DESCRIPTIONS

C-277

System 2 Installation / Programming Manual

APPENDIX C

TERMINAL DESCRIPTIONS

Terminal #1 - Earth Ground

This terminal must be connected to a suitable and approved ground as defined by the National

Electrical Code. Use a 12 gauge or larger solid copper wire. All shields from Keypads or Card

Readers must also connect to Terminal #1.

Terminals #2 and #3 - AC Power

A 16.5 volt 40VA transformer is recommended.

Terminal #4 - Drop Input (+)

This input can be used to open the normally closed contacts on both main relays. When

(+)12VDC is applied to this input the main relays will “drop out”. This would generally be used

in an emergency condition.

Terminal #5 - (-) Common

This is the System 2's common power supply negative.

Terminals #6 through #8 - Aux Relay # 1

The contacts are rated at 5 AMPS 30 volts DC. This relay can be activated by time schedules,

codes or any System event. Terminal #6 is Normally Open, #7 is Common, and #8 is Normally

Closed.

Terminals #9 through #11 - Aux Relay # 2

The contacts are rated at 5 AMPS 30 volts DC. This relay can be activated by time schedules,

codes or any System event. Terminal #9 is Normally Open, #10 is Common, and #11 is Normally

Closed.

Terminal #12 - Aux Voltage Output #1

This contact is rated at 50 mA maximum. They are capable of switching negative for up to 50

mA. This output can be activated by time schedules, codes or any System event.

Terminal #13 - Aux Voltage Output #2

This contact is rated at 50 mA maximum. They are capable of switching negative for up to 50

mA. This output can be activated by time schedules, codes or any System event.

Terminal #14 & #15 RS485 Buss

This is where the multiple System 2's are wired. Polarity must be observed from the Master to

any additional Slaves (System 2's) on the buss.

Terminals #18 through #21 - BCD Keypad Input Data Lines

All Keypads used with the System 2 output a Binary Coded Decimal (BCD) output. BCD has

four data lines DATA 1 (#18), DATA 2 (#19), DATA 4 (#20), and DATA 8 (#21).

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Myalarm V-LCD1 Manual de Instruções Página 283