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SMC sierra monitor corporation Sentry Instruction Manual - Version 6
INSTALLATION
Page: 18
Install conduit as required. Provide for splice boxes where
multiple modules will be wired to a single run. Pull 3
(typical: white, black, green) conductors of the correct
gauge wire from the controller to each splice box and from
the respective splice box to each planned module location.
See Figure 3-5 for proper wire termination in the splice
box. Twisted wire secured with wire nuts is not an
acceptable splice.
NOTE
Installation and wiring must be in accordance with the
National Electrical Code
In installations where redundancy of module locations is a
requirement do not install multiple modules on one cabling
run as any damage to the primary wiring will disable all the
modules.
NOTE
Temperature rating of cable wire insulation must be
above 75
o
C (85
o
C or greater rating wiring is
recommended). If cable runs through higher temperature
environments, it should be specified for that environment.
3.4 SENSOR MODULE INSTALLATION
Note: Remove spring from the electromechanical
sensor (5100-04 through 5100-23) prior to installation.
See technical note provided with sensor module.
1. Remove the electronics from the module housing
by:
• Unscrew the two captive panel screws in the
top plate.
• Lift the electronics out of the housing.
• Unplug the sensor harness from the bottom
electronics board.
2. Install the module housing onto the end of the
supply conduit and/or bolt into position as
required.
Note
If housing grounding is required for the installation a
grounding lug is located under the two printed circuit
assemblies in the housing. Install the ground wire under
the green lug. Figure 3-5
3. Connect the three wires which run from the
controller to the three position terminal strip on the
bottom of the electronics assembly. See Table 3-3
for terminal markings and normal wiring color
code conventions. Figure 3-7 shows the correct
wiring connections and the operation of the
connector mechanism.
Controller
Marking
Function Module
Marking
Color
1 +VDC P White
2 Signal S Black
3 DC Return G Green
Table 3-3
Sensor Module Wiring
4. Reconnect the sensor harness to the sensor
connector on the bottom of the electronic
assembly. Figure 3-7.
5. Twist the assembly 180
o
to take up the service
loop on both the incoming wire and the sensor
harness. With the sensor facing down the wording
on the cover plate will be correctly oriented.
6. Carefully fit the electronics over the two posts in
the housing and tighten the captive panel screws.
Module Switch Positions
# 1 2 3
1 ON ON ON
2 OFF ON ON
3 ON OFF ON
4 OFF OFF ON
5 ON ON OFF
6 OFF ON OFF
7 ON OFF OFF
8 OFF OFF OFF
Table 3-4
Sensor Module Binary Switch Positions
7. Set the dip switch Figure 3-8 on each module to
indicate the module number (Table 3-4). Each of
the modules connected to one controller must have
a different address. (Note: Switch position 4 is not
used.)