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-
NEXT
DEVICE
PREVIOUS
DEVICE
ANALOG LOOP
ANALOG LOOP
S+ S- R+ R- I+ I-
I+ I-
Power
Supply
+
-
Power to
next
device
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