SYSTEM 238 Installation Manual
BLK
RED
BATTERY
DIRECT
CONNECT
U1
J2
DS1
WATCH
DOG
T1
TB1
DEVICES
UNSWITCHED
AUX
POWER
- Protected by
Fuse F2:
3 AG, 0.75 A
- Shared with
keypads and
AUX POWER
KEYPAD
INFORMATION
- Do not exceed
4 keypads or
max AUX POWER
- Protected by Fuse
F3: 3 AG, 0.75 A
WARNINGS:
- For continued protection
against risk of fire, replaces
fuses only with fuses of same
type and rating
- Disconnect AC, battery, and
phone cord BEFORE servicing
2.2K
EOL
2.2K
EOL
2.2K
EOL
2.2K
EOL
2.2K
EOL
2.2K
EOL
2.2K
EOL
2.2K
EOL
Capacity for
emergency standby
at least 4 hours
- Connect ground wire from door hinge to earth ground using
16 AWG, green jacketed, solid-conductor wire
GENERAL INFORMATION
- All outputs are power limited
- If programmed for EOL or Supervised loop, the 2.2K ohm EOL
resistor (Model 9.X, 2.2K) must be at end of circuit
- Loop 8 can be used as standard loop or used for switched 10-
12.5 VDC at 50 mA for 2-wire powered devices. Loop 8 can
support up to 10 BRK Model 2400 2-wire smoke detectors.
- Loop voltages:
Loops 1 - 8
0 - 2.5 VDC = short
2.5 - 8.5 VDC = normal
8.6 - 15 VDC = open
- Install transformer on unswitched power receptacle
- Only use 12 VDC, 6.5 AH sealed lead-acid battery
POWER SUPPLY INFORMATION
- Replace battery every 3 - 5 years with C&K Model 1265
- Standby time with 1 keypad is 16 hours at 250 mA
- Power demand for AUX POWER, keypads, and sounders
not to exceed maximum ratings
Fuse F4
3 AG, 3 A
battery
protection
-
are electrically common
AUDIBLE
10.5-13.5 VDC
Protected by
Fuse F1: 3AG,
2.5 A
16.5 VAC
25 - 40 VA
50 / 60 Hz
SWITCHED
AUX
POWER
P/N 5-051-162-00 Rev J
All ratings listed on this page are in compliance
with UL 985, UL 1023, and UL 1635.
NOTE:
To be in compliance with UL 365 and UL 609,
total power from Sw/Aux, Aux, and Key+
Terminals not to exceed 150 mA combined.
AUX
C
C
AC
AC
+
-
+
-
+
+
-
+
+
-
+
+
-
-
+
+
BELL
SW/AUX
KEY+ DATA CLK
C
Z1
Z2
Z3
C
Z4
Z5
C
Z6
Z7
+
+
C
Z8
Tip
Ring
T1
R1
PHONE
CORD
- 9.X PCF
Red = incoming ring
Green = incoming tip
Gray = seized ring
Brown = seized tip
Blue = tamper
Orange = tamper
WARNING:
Circuit Damage May Result
From Incorrect Wiring Connections.
- Remove AC and battery power before replacing fuses
- Maximum battery charge current = 350 mA
CAUTION:
Total power from Bell, Sw/Aux, Aux and
Key+ Terminals NOT to exceed 1.3 A,
combined (also see NOTE: below)
12 VDC
6.5 AH
sealed lead-acid
