Zyxel MGS3520-28F [32/338] 2 3 11 10 4 5 6 9 8 7 10

Zyxel MGS3520-50 [32/338] 2 3 11 10 4 5 6 9 8 7 10
Chapter 3 Hardware Overview
MES3500/MGS3520 Series User’s Guide
32
1 Use a connector to connect wires of the correct gauge (18 AWG or larger) to the sensor’s signal
output pins. Check the sensor’s documentation to identify its two signal output pins.
2 Connect these two wires to any one of the following pairs of signal input pins on the Switch’s Signal
connector--(4,5) (6,7) (8,9) (10,11). The pin numbers run from the right side of the connector to
the left.
2a Connect each of the sensor’s two signal output wires to the Signal connector by depressing
the spring clip corresponding to the pin you are connecting to.
2b Insert the wire and release the spring clip.
2c Repeat the process for the sensor’s other signal output wire. A total of four sensors may be
connected to the Signal connector in this way using the remaining signal input pins.
3 Insert the alarm connector into the Signal slot.
Figure 21 Connecting a Sensor to the Signal Slot
4 To connect an output devicel, repeat the previous steps but this time connect to either pins (1,2) or
(2,3) 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.
1 Use wires of the correct gauge to connect either of the signal output pin pairs (1-normal close, 2-
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.
2 When daisy-chaining further Switches ensure that the signal output pins you use are the same as
those you used when connecting to the first switch, as shown in the diagram below.
12311 10 45698710
Door Open
Sensor
Spring
Clip
Signal
Connector
Signal Input Pins
Signal
(Dry contact,
Output
Pins
normal open only)

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