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MX4428 MXP Engineering / Technical Manual Document: LT0273
Device Information and Programming
Page 3-46 24 March 2006 Issue 1.5
3.22.3 SNM800 FIELD WIRING
SNM800 SOUNDER
NOTIFICATION MODULE
L+ L+L- L-
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ANALOG LOOP
A
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Power
Supply
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27k
0.5W
EOL
++ +
-- -
Figure 3.8 SNM800 Field Wiring
It is recommended that the external supply covers only one zone, or the power wiring be
arranged so that an open circuit in the power feed cannot affect more than one zone. A loop
arrangement with supervision and a reverse-feed relay can be used to achieve this - refer to
Product Bulletin PBF0200.
3.22.4 MX4428 PROGRAMMING OPTIONS - SNM800
The mode selects the control source for the SNM800 output, load supervision, and EOL
supervision. By default (mode = 15) the output follows the logical relay, the external supply is
supervised, and the EOL is supervised.
Parameter Description Default
Mode Output Control Monitor
Supply ?
Monitor
EOL ?
8 Cct Alarm No No
9 Cct Alarm No Yes
10 Cct Alarm Yes No
11 Cct Alarm Yes Yes
12 Relay No No
13 Relay No Yes
14 Relay Yes No
Mode
15 Relay Yes Yes
15
P0
P1 Normal to o/c fault threshold 221
P2 Normal to s/c fault threshold 20
P3 Supply fault threshold 200
P4
P5
P6