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Use a connector to connect wires of the correct gauge (18 AWG or larger) to the sensor's signal output
1
pins. Check the sensor's documentation to identify its two signal output pins.
Connect these two wires to any one of the following pairs of signal input pins on the Switch's Signal
2
connector--(4,5) (6,7) (8,9) (10,11). The pin numbers run from the right side of the connector to the left.
Connect each of the sensor's two signal output wires to the Signal connector by depressing the
2a
spring clip corresponding to the pin you are connecting to.
Insert the wire and release the spring clip.
2b
Repeat the process for the sensor's other signal output wire. A total of four sensors may be
2c
connected to the Signal connector in this way using the remaining signal input pins.
Insert the alarm connector into the Signal slot.
3
Figure 16 Connecting a Sensor to the Signal Slot
Door Open
Sensor
Signal
Connector
To connect an output devicel, repeat the previous steps but this time connect to either pins (1,2) or (2,3)
4
on the Signal 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 that is a different model, check your switch's documentation
for the correct pin assignments.
Use wires of the correct gauge to connect either of the signal output pin pairs (1-normal close, 2-
1
common) or (2-common, 3-normal open) on the Signal connector to the input signal pin pairs of an
Signal connector on another Zyxel Switch.
When daisy-chaining further Switches ensure that the signal output pins you use are the same as those
2
you used when connecting to the first switch, as shown in the diagram below.
Chapter 3 Hardware Overview
11 10
10
9
8
7
Signal Input Pins
(Dry contact,
normal open only)
MES3500-24S/MGS3520 Series User's Guide
32
Spring
Clip
6
5
4
3
2
1
Signal
Output
Pins
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Table of Contents
Troubleshooting
