User manual

Chapter 2: Installing your TVS Phason
18
Connecting an alarm system
You can connect an alarm system to your TVS's alarm terminal. An alarm system can be a siren,
alarm panel, or auto-dialer. Read your system’s installation guide for installation instructions and
information about the type of system: normally open or normally closed. Below are the descriptions for
the alarm terminal.
 COM: common connection
 N/O: normally open; closes during alarm conditions
 N/C: normally closed; opens during alarm conditions
For the alarm system to sound (or dial out) during an alarm condition, you must enable the alarms.
For more information, read Programming alarm settings on page 35.
The ratings of the alarm system must not exceed the ratings of the relay.
Alarm relay ratings: 0.4 A at 125 VAC; 2 A at 30 VDC, resistive load
0.2 A at 125 VAC; 1 A at 30 VDC, inductive load
To connect an alarm system

If you are connecting the alarm system to a network of controls and your system uses a normally
open connection (closes on alarm), connect the system as shown in the normally open diagram.
Join all the COM connections together and all the N/O connections together. Your TVS alarm
relays must be in parallel with each other so any TVS can trigger the alarm system when an alarm
condition occurs.
 If you are connecting the alarm system to a network of controls and your system uses a normally
closed connection (opens on alarm), connect the system as shown in the normally closed diagram.
Join the alarm relays in a continuous loop. Your TVS alarm relays must be in series with each
other so any TVS can trigger the alarm system when an alarm condition occurs.
Normally open system (closed on alarm) Normally closed system (open on alarm)
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ALARM
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ALARM
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ALARM
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ALARM