Chapter 3 Hardware Overview
MES-3528 User’s Guide
38
•The ALARM slot can send an external alarm on to another device such as an
alarm bell.
• By daisy-chaining the alarm sensor cables from one Switch to another ZyXEL
switch which supports this feature, the external alarm alert (but not the system
alarm) is received on each Switch.
• The Switch can be configured to send an SNMP trap to the SNMP server. See
Section 33.3 on page 286 for more information on using SNMP.
• The Switch can be configured to create an error log of the alarm. See Section
35.1 on page 309 for more information on using the system log.
3.1.5.1 Connect a Sensor to the ALARM Slot
This section shows you how to connect up to four sensors to the ALARM slot and
to let a bell signal the alarm, as shown in the diagram below.
Figure 14 Connecting Sensors to the ALARM connector
Follow these steps to connect an external sensor device to the Switch.
1 Use a connector to connect wires of the correct gauge to the sensor’s power
output pins. See Chapter 41 on page 335 for the wire specifications. Check the
sensor’s documentation to identify its two power output pins.
2 Connect these two wires to any one of the following pairs of power input pins on
the Switch’s ALARM 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 power output wires to the ALARM
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 power output wire. A total of four
sensors may be connected to the ALARM connector in this way using the
remaining power input pins.
Alarm
bell
Forced
Smoke
Movement
Flooding
ALARM Slot
Entry
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