ZyXEL Communications MGS-3712, User Manual

Page: 46 / 308

Chapter 3 Hardware Overview
MGS-3712/MGS-3012F User’s Guide
46
2c Repeat the process for the sensor’s other power output wire. A total of four sensors
may be connected to the ALARM connector in this way using the remaining power
input pins.
3 Insert the alarm connector into the ALARM slot.
Figure 20 Connecting a Sensor to the ALARM Slot
4 To connect an output device such as an alarm bell, repeat the previous steps but this time
connect to either pins (1,2) or (2,3) on the
ALARM connector.
You can also daisy-chain the external alarm to another ZyXEL Switch which supports the
external alarm feature. If daisy-chaining to a ZyXEL switch different from the MGS-3712(F),
check your switch’s documentation for the correct pin assignments.
1 Use wires of the correct gauge to connect either of the power output pin pairs (1- normal
close , 2- common ) or (2- common , 3- normal open ) on the ALARM connector to the input
power pin pairs of an ALARM connector on another ZyXEL Switch.
2 When daisy-chaining further Switches ensure that the output power pins you use are the
same as those you used when connecting to the first switch, as shown in the diagram
below.
Figure 21 Daisy-chaining an External Alarm Sensor to Other MGS-3712s
1 2 3 11 10 4 5 6 9 8 7 10
Smoke
Detector
Spring
Clip
ALARM
Connector
Alarm Input Pins
Alarm Output Pins
1 2 3 11 10
.........
1 2 3 11 10
.........
1 2 3 11 10
.........
Pin Assignments