SNM
SUPERVISED NOTIFICATION MODULE
Figure 1: Connecting 2-Wire and 4-Wire Notification Circuits
J2 Jumper Header
Bell Silence Switch
J2 Jumper Header
Bell Silence Switch
Trouble and Ground
Fault LED's
Trouble and Ground
Fault LED's
Aux. Power
Aux. Power
Ground
Panel Common
Alarm In
Alarm In
+ Bell Power In
+ Bell Power In
- Bell Power In
Style Y
- Bell Power In
+ Bell Out A
- Bell Out B
Not Used
Style Z
+ Bell Out A
- Bell Out A
+ Bell Out B
Trouble and Ground
10k Ohm EOL Resistor
- Bell Out B
N/C Trouble Contacts
N/C Trouble Contacts
N/C Trouble Contacts
N/C Trouble Contacts
For both 2-wire and 4-wire appliances, connect a jumper between terminals 3 and 4 and
between 2 and 5 when powering the notification appliance circuit from the control panel.
Description
The SNM provides Style Y or Z supervision for ground faults, opens,
and shorts on notification appliance circuits connected to fire alarm
control panels. The SNM is suitable for use with 2 or 4-wire circuits, and
provides one Trouble and one Ground Fault LED and a set of Normally
Closed trouble contacts to indicate off normal conditions. The SNM also
provides a Bell Silence switch for use during testing or service.
You can connect a maximum 5 Amp, 12 or 24 VDC UL listed
auxiliary power supply to the module to support alarm power
requirements beyond the panel's alarm output capacity.
Installing the SNM Module
You can install the SNM module in any of the panel enclosure's
3-hole mounting locations using the plastic standoffs provided. To
install the module into the enclosure, follow the steps below:
1. Mount the plastic standoffs to the enclosure using the three included Phillips head screws.
2. Insert the screws from the outside of the enclosure through the holes and into the plastic standoff which mounts on the inside of the enclosure and tighten.
3. After the standoffs have been secured onto the enclosure, snap the module onto the standoffs.
Wiring
Refer to Figure 1 to properly connect 2-wire and 4-wire notification
circuits to the Supervised Notification Module.
Specifications
Operating Voltage
Terminal 1: 9.6 to 14.2 VDC
Operating Current
Terminal 1: 26mA Idle and 85mA Alarm
Terminal 3: 33mA max
Maximum Alarm Current
Terminal 4: 5 Amps at up to 30 VDC when using appropriate UL listed power supply.
Bell Silence Switch NORMAL: For normal operation.
BELL SILENCE: For testing or service use.
Trouble LED
Lights during an open, short, or short-
to-ground on the indicating circuit.
Ground Fault LED
Lights during a short-to-ground on the indicating circuit.
J2 Jumper
ON: For no alarm output with a ground fault condition (Style W and X).
OFF: For uninterrupted alarm output with a ground fault condition (Style Y and Z).
Circuit Styles
One 2-wire Style W or Y indicat-
ing circuit, or One 4-wire Style X or Z indicating circuit.
Potter Electric Signal Co., LLC • St. Louis, MO • Cust Service: 866-240-1870 • Tech Support:866-956-1211• Canada 888-882-1833 • www.pottersignal.com
PRINTED IN USA
MKT. #8900111 - REV A
5/03
PAGE 1 OF 2
SNM
SUPERVISED NOTIFICATION MODULE
Installing The J2 Jumper
Installing the J2 jumper provides for Style W (2-wire) and Style X
(4-wire) circuits. The J2 jumper also disables the alarm bell output in
the event of a ground fault on either side of the notification circuit.
Do not install the J2 jumper for Style Y or Z circuits.
Wiring Multiple Notification Circuit Modules
Refer to the wiring diagram below to properly wire multiple
Notification Circuit Modules.
Figure 2: Connecting Multiple Modules
J11
462N Network Interface Card
J12
J3
J4
Tamper
Header
DD, MPX
Selection
Headers
To additional 866
Notification Circuit
Modules. All
modules must be
installed in an
approved enclosure
connected to the
panel by conduit.
Normal/Silence Switch
865
Module
1 AUX PWR
2 GND
3 Alarm In
4 Bell PWR In +
5 Bell PWR In 6 Bell Out A +
7 Bell Out A 8 Bell Out B +
9 Bell Out B 10 Bell Trouble
11 Bell Trouble
J2 Output Header
J10
J16
Panel
Reset
AC
AC
+B
1
2
3
-B BELL GND RED YEL GRN BLK SMK GND Z1 GND Z2
4
5
6
7
8
9
10
11
12
13
SNM
Module
14
15
Z3 GND Z4
Z5 GND Z6
16
19
17
18
20
21
Z7 GND Z8
22
23
24
Z9+ Z9- Z10+ Z10-
25
26
27
28
Install the jumper on the J2 header to
disable Bell Output during ground fault
conditions.
10K EOL
+
The 865 Module is suitable for Style Y
notification circuits, as shown in this
diagram, and for Style Z notification
circuits.
The
-
Power
Supply
Module and Power
Supply Trouble Zone
To additional 866
Notification Circuit
Modules.
Normal/Silence Switch
865
Module
1 AUX PWR
2 GND
3 Alarm In
4 Bell PWR In +
5 Bell PWR In 6 Bell Out A +
7 Bell Out A 8 Bell Out B +
9 Bell Out B 10 Bell Trouble
11 Bell Trouble
SNM
Module
Module and Power
Supply Trouble Zone
PRINTED IN USA
10K EOL
+
-
Power
Supply
MKT. #8900111 - REV A
5/03
PAGE 2 OF 2