DOC: GLT.MAN-125
ISSUE:
1
www.gltexports.com
DATE:
14/4/08
ALARM SYSTEMS
ADDRESSABLE INTERFACE UNITS
ZIU – ADDRESSABLE INPUT UNIT
5
0
4
9
6
1
3
87
2
5
0
4
9
6
1
3
87
2
5
0
4
9
6
1
3
87
2
D
Connections & Address Setting
The ZIU has the following connections:-
Loop IN +
Loop IN – (2 connections)
Loop OUT +
Loop out –
MON I/P (2 connections)
Normally the loop cables will be connected one pair of +/- to the IN terminals (use either IN-
terminal), and the other pair of cables to the OUT terminals. If the isolator needs to be
PERMANENTLY bypassed, connect the – OUT to the spare –IN terminal. To temporarily bypass
the isolator (eg for a DVM cable continuity check), fit a shorting link to position J1.
The ZIU is now addressed by 3 rotary switches, one for 100`s one for 10`s, one for units. Select
an address between 1 & 126. (The picture shows 037)
PCB Identification
The same PCB is used for The
ZIU (input only), ZIOU (Input
with volt free relay output), and
ZSCC (sounder circuit
controller). Each PCB will have
an Identification mark (tick or
“X”) to show which model it is.
Description
The Zeta addressable Input Unit (ZIU) is used to interface
external equipment which has a volt free NORMALLY OPEN
relay output to any Zeta Analogue Addressable fire alarm
system. The input is monitored with a 47k end of line resistor.
The unit has a built in loop short circuit isolator to help
keep the unit operational in the event of a problem on the
addressable loop wiring.
It has 3 indication LEDs on the front of the unit. One for
Alarm, one for local fault and one for addressable loop fault (Isolator active).
