8
4.4.3 Electrical Ratings
PRIMARY DC:
VDC: 18 - 40
Current draw, standby
143 mA max. with annunciator attached
84 mA max. without annunciator
Current draw, alarm
227 mA max. with annunciator attached
154 mA max. without annunciator
AC RATING:
45 mA max.
CHANNEL (ZONE) INPUTS:
0 - 30 VDC input
10 mA max. current draw
MAX. WATCHDOG RESPONSE:
50 seconds
5. Wiring Precautions
To avoid induced noise (transfer of electrical energy from one wire to another), keep input wiring isolated from
high current output and power wiring. Induced noise can interfere with telephone communication, or even
cause false alarms. Avoid pulling one multiconductor cable for the whole panel. Instead, separate the wiring as
follows:
High current input/output: AC monitoring (if monitored directly)
Low current input/output: 24 DC power and channel (zone) wiring
Audio input/output: Telephone wiring
Wires from different groups should not be pulled through the same conduit. If you must run them together, do
so for as short a distance as possible, or use shielded cable. Connect the shield to circuit ground at the panel.
High and low voltages must be routed separately.
High frequency noise, such as that produced by the inductive reactance of a bell, can also be reduced by
running the wire through ferrite shield beads or by wrapping it around a ferrite toroid.
NOTE: All wiring must be within the range of 12-18 American Wire Gauge (AWG). In UL installations, the
5128/29 must be located in the same room as the fire control panel.
