SYSTEM 238 Installation Manual
BATTERY
TB1
AC
AC
BELL
C
C
SW/AUX
+
-
+
-
DEVICES
SWITCHED
16.5 VAC
AUDIBLE
AUX
25 - 40 VA
10.5-13.5 VDC
POWER
50 / 60 Hz
Protected by
Fuse F1: 3AG,
2.5 A
Fuse F4
3 AG, 3 A
battery
protection
12 VDC
6.5 AH
sealed lead-acid
POWER SUPPLY INFORMATION
- Only use 12 VDC, 6.5 AH sealed lead-acid battery
- 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
- Install transformer on unswitched power receptacle
- Remove AC and battery power before replacing fuses
- Maximum battery charge current = 350 mA
BLK
RED
Capacity for
emergency standby
at least 4 hours
AUX
KEY+ DATA CLK
Z1
C
+
+
+
-
2.2K
EOL
UNSWITCHED
AUX
POWER
- Protected by
Fuse F2:
3 AG, 0.75 A
KEYPAD
- Shared with
INFORMATION
keypads and
AUX POWER
- Do not exceed
4 keypads or
max AUX POWER
- Protected by Fuse
F3: 3 AG, 0.75 A
CAUTION:
Total power from Bell, Sw/Aux, Aux and
Key+ Terminals NOT to exceed 1.3 A,
combined (also see NOTE: below)
U1
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
WARNING:
Z2
Z3
C
Z4
Z5
C
+
+
-
+
+
-
2.2K
2.2K
2.2K
2.2K
2.2K
EOL
EOL
EOL
EOL
EOL
GENERAL INFORMATION
- Connect ground wire from door hinge to earth ground using
16 AWG, green jacketed, solid-conductor wire
- 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
-
are electrically common
All ratings listed on this page are in compliance
with UL 985, UL 1023, and UL 1635.
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.
J2
DIRECT
CONNECT
DS1
WATCH
DOG
T1
Circuit Damage May Result
From Incorrect Wiring Connections.
Z6
Z7
C
Z8
Tip Ring
T1
+
+
-
+
PHONE
CORD
2.2K
2.2K
- 9.X PCF
EOL
EOL
NOTE:
P/N 5-051-162-00 Rev J
R1
Red = incoming ring
Green = incoming tip
Gray = seized ring
Brown = seized tip
Blue = tamper
Orange = tamper
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