Code Alarm CR3 Bedienungsanleitung PDF herunterladen (Seite 5)

ALARM INPUTS TB1-1 thru TB1-8

The external dry relay contacts, representing the alarms, are connected to terminals 1 to 8 in

clusive. These optically coupled inputs sense alarm activity by either a closure to ground or

an open circuit. Programming options select either normally open (NO) or normally closed

(NC) alarm contacts. The alarm ground must be the same as the power ground. Do not ap

ply any voltage source to the input terminals. Active current on each input is 100 mA.

RELAY OUTPUTS TB2

Four form C relay contacts are available on TB2. Table 1 shows the connections available at

each pin. The relays are controlled by receiving DTMF digits from the radio system

(through the master) that correspond to its internally programmed parameters. Refer to the

programming section for further details.

SERIAL IN / SERIAL OUT PORTS P3, P4

Connections from the master to the expander and between expanders are made to P3 and P4

using a shielded single cable conductor. This connection allows data to be transferred be

tween the master and the expanders.

ALWAYS power up both the expander and ARU together AFTER this communication cable

has been connected. Failure to do so could cause damage to one or both units.

B1225E BARNETT ENGINEERING LTD. PAGE 4

8 Relay 3

common

11 Relay 4

Relay 1

Relay 2

NO contact

TB2 FUNCTION

common

NO contact

NC contact

TABLE 1 RELAY CONNECTIONS

1 2 3 4 5 6 7 8 9 10 11 12

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Code Alarm CR3 Bedienungsanleitung Seite 5