Xl-4, XL-4B, and XL-5 Hookup and Installation Instructions
Version 4
4–4
Intercom Considerations
If an intercom system is used, the multiplex polling loop wires must be as far from the
intercom wiring as possible (minimum 6"). If this spacing cannot be achieved, shielded wire
must be used. If this is not done, interference on the intercom system might occur. Also note
that the maximum total wire length supported is cut in half when shielded wire is used.
Supervision
The control panel will poll points that exist on the polling loop. If the point is not found, a
supervision error exists. This could occur if a point has not responded or if a portion (or all) of
the polling loop has been removed. Supervision problems will be handled based on the
programming characteristics of the specific point and the arming status of the panel. For
example if the point is defined as a 24-hour alarm, an alarm condition will be generated
based on the programming of that zone. If the zone is a non-24 hour zone then an alarm will
be generated only if the system is armed.
Tamper
The two point multiplex adapter modules contain a built in tamper switch. If the cover on the
individual module is removed then an alarm condition will be generated based on the
programming characteristics of the left loop of that device. For example, if the left loop is
defined as a 24-hour device then an alarm condition will be generated; if a non 24-hour alarm
(controlled device) then the reaction will depend on the arming status.
Power Considerations
The maximum allowable current draw for the polling loop is 75mA (75mA per loop output on
the 7126). In order to confirm that you are not exceeding the current limitations of each
multiplex bus, complete the following worksheet based on the types of devices connected to
each bus:
MULTIPLEX LOOP POWER WORKSHEET
Mux Loop
LP1
LP2 (7126 ONLY)
Multiplex Device
Maximum Current
# Devices
Current
# Devices
Current
2 Point
✴
[XL-4702]
Multiplex Adapter
1mA Low Setting
2mA High Setting
8 Point
✴
[XL-4708]
Multiplex Adapter
16mA
✴
Burglary Applications Only
TOTAL
NOTE: Maximum current of 75mA for LP1 and 75mA for LP2
The following listing provides the current requirements for the multiplex peripheral devices:
MODEL
NAME
CURRENT
XL-4701
Single Point Multiplex Interface
1mA
XL-4702
2 Point Multiplex Adapter Module
1mA
XL-4708
8 Point Multiplex Adapter Module
1mA
XL-4722
Dual Element Passive
1mA
XL-4750SDT Smoke Detector
1mA
ZR-745MSL
Recessed Contact with RPM
1mA
ZR-750MOH Multiplex Overhead Door Cantact
1mA
ZR-795MR
Recessed Multiplex Contact
1mA