
GASMAX CX Operation & Maintenance Manual, Revision 1.0
Page 19
LOCAL
GDS
‐
IR
INFRARED
SENSOR
When
the
GASMAX
CX
is
configured
to
include
a
GDS
‐
IR
Infrared
Combustible
or
CO2
sensor,
the
IO/Power
Supply
board
is
factory
modified
to
make
Channel
2
compatible
with
the
sensor’s
4
‐
20mA
input
signal.
An
integrated
“zero
set”
pushbutton
and
magnetic
zero
switch
is
included
inside
the
GASMAX
CX
enclosure
and
is
used
to
periodically
set
the
zero
point
for
the
GDS
‐
IR.
Figure 4-10: Local GDS-IR Infrared Sensor
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
GASMAX
CX
with
LOCAL
GDS
‐
IR
SENSOR
GDS
‐
IR
INTERFACE
BOARD
MOUNTED
INSIDE
GASMAX
CX
ENCLOSURE
USE
MAGNETIC
WAND
TO
ACTIVATE
SET
ZERO
SWITCH
MOUNTED
ON
GDS
‐
IR
INTERFACE
BOARD
INSIDE
GASMAX
CX
ENCLOSURE