
GASMAX CX Operation & Maintenance Manual, Revision 1.0
Page 18
CONNECTING
A
REMOTE
INFRARED
SENSOR
TRANSMITTER
GASMAX
CX
monitors
with
remote
‐
mount
infrared
sensor
transmitter
for
combustibles
or
CO2
are
shipped
in
two
pieces
and
sensor
wiring
must
be
installed
by
the
end
user.
Remote
infrared
sensor
transmitters
connect
to
the
Channel
1
or
Channel
2
4
‐
20mA
analog
input
connections
on
the
Power
I/O
board
as
shown
below.
Remote
infrared
sensor
transmitters
use
industry
standard
4
‐
20mA
signal
levels
and
can
therefore
be
mounted
at
some
distance
from
the
GASMAX
CX.
GDS
Corp
recommends
a
maximum
distance
of
500
ft.
/
150
m
using
shielded
two
‐
wire
cable
sized
appropriately.
Figure 4-9 Remote Infrared Sensor Transmitter
NOTE:
FIELD
WIRING
FOR
REMOTE
INFRARED
SENSOR
TRANSMITTERS
IS
POLARIZED
AND
CORRECT
WIRING
POLARITY
MUST
BE
OBSERVED.
CO
M
42
0
OU
T
2
42
0
OU
T
1
PW
R
R/
P
W
R
C/
4
20
IN
1
A/
C
O
M
42
0
IN
2
CH
1
CH
2
E
‐
NE
T
LOCAL
SENSOR
TO DISPLAY
PW
R
mA
O
U
T
GN
D
PW
GASMAX
CX
GDS
‐
50 REMOTE
SENSOR
TRANSMITTER