FMS-1655M
LIT-12013119
9
Mounting/Wiring
Installation
Remote sensor mounting
procedure
1. Cut an opening in the wall of the
isolation room to receive the supplied
single-gang “old work” low voltage
mounting bracket (Figure 1) for the
remote sensor module. Nominal
dimensions for the cutout are 3.65” H x
2.15” W. Drill a 7/16” hole through the
opposite wall for the flow tube.
2. Install the single-gang low voltage
mounting bracket in the cutout. Route
a length of supplied flow tube through
the mounting bracket and through the
7/16” hole in the opposite wall.
Separate the backplate from the
touchscreen display enclosure by
turning the set screw at the bottom of
the display enclosure fully clockwise
to release the backplate. Pull the
backplate bottom out slightly to
clear the bottom edge of the display
enclosure and slide the backplate down
away from the tabs at the top of the
enclosure. Disconnect either end of the
gray harness between the backplate
and display module by pushing down
on the locking tab, and then sliding the
connector out. Disconnect the interface
cable from the display module by
removing the terminal block from the
4 pin connector CN3 on the display
module PC board.
3. Confirm that the 4-conductor
interface cable between the remote
sensor module and the touchscreen
display module has its red and black
conductors securely attached to the
+V and GND terminals, respectively.
Route the end of the interface cable
with the 3 and 4 pin connector down
the wall to the anticipated location of
the touchscreen display module.
4. Using a suitable length of 2 conductor
20 AWG cable, connect the output of
the universal isolated power supply
module to the power input at the
remote sensor module. The output
of this power supply module is non-
polarized, so the two red wire may be
wired to power input terminals in either
orientation. Refer to page 12-13 for
power wiring details.
5. The FMS-1655M Monitor has a
factory-calibrated analog output and is
available as voltage at the Vo terminal.
The designated output (Vo) can be
used to control a damper actuator to
maintain a user set pressure setpoint
when the FMS-1655M Monitor is used
in a controller application.
6. Attach the pluggable connector to the
mating header on the remote sensor
module. Attach the end of the flow tube
to the barbed fitting at back of sensor,
and then secure the remote sensor
module to the mounting bracket with
two supplied 6-32 x ¾” screws.
7. Install the louvered cover plate onto
the installed sensor module using
two supplied machine screws. On the
opposite side of the wall (corridor side),
attach the end of the flow tube to the
barbed fitting of the flow tube mounting
plate.
8. Press the mounting plate into place,
allowing the excess tube length to
go into the wall space. Secure the
mounting plate with the supplied
screws and wall anchors.
9. Install a louvered cover plate
onto the mounting plate using two
supplied machine screws.
Fig 1. Single-gang, low-voltage mounting
bracket.
