Interlogix Simon XT Tabletop Installation Manual - Manual (Page 29)

Chapter 3:
Simon XT TableTop Control Panel Installation Manual 23
Note: The total current available from HW1&2 DC Out is 250 mA at up to 120°F
(49°C).
With Hardwired Siren Supervision turned on, sirens connected to HW1 I/O are
supervised and require a 4.7 kohm resistor in the circuit. If this terminal is not
used, turn Hardwired Siren Supervision off.
LD105 hardwired interior siren
You must always wire interior sirens with a resistor in the circuit. For circuit
supervision which allows the panel to detect if the siren wire is cut (open), you
must turn on Hardwired Siren Supervision. (See Table 21 on page 42).
Note: Do not install the resistor at the panel terminals. This does not provide
supervision of the wire.
Connect the LD105 hardwired interior siren (13-374) to the panel using a 4.7
kohm resistor (included with the siren) as shown in Figure 4. The resistor must
be connected across the siren wires as close to the siren as possible.
Figure 4: Hardwired interior siren with supervision
Hardwired contacts
To set up HW1 I/O and/or HW2 In for hardwired contacts, make the required
connections as described below, then proceed to Programming overview on
page 26 to add (learn) them into panel memory.
You can connect hardwired reed switches (normally closed loop only) to HW1
I/O, if not being used for a hardwired siren, and/or HW2 In.
Connect only normally closed (NC) reed switches to HW1 I/O and/or HW2 In.
Other types of hardwired detectors should not be used.
The total resistance of the wire loop must not exceed 3 ohms. This allows you to
use up to 200 ft. (61 m) of two-conductor, 22-gauge stranded wire.