GDS-68XP Operation & Maintenance Manual, Revision 3.5
Page 16
POWER
&
SIGNAL
CONNECTIONS
To
access
the
power
and
signal
wiring,
remove
the
cover
from
the
explosion
proof
enclosure.
Connect
a
source
of
+24VDC,
±
10%
power
to
wiring
terminals
J1
‐
1
(+24V)
and
J1
‐
3
(GND).
The
4
‐
20mA
(source)
output
is
available
at
J1
‐
2
(See
Fig.
5
‐
2).
ON
‐
DEMAND
SEQUENCE
INPUT
If
the
“on
‐
demand’
sequencer
mode
is
selected
the
GDS
‐
68XP
will
enter
a
hold
mode
until
an
external
contact
closure
between
J6
‐
1
and
J6
‐
2
occurs.
This
causes
the
GDS
‐
68XP
to
perform
a
single
sample
sequence.
Upon
completion,
the
DONE
output
will
be
pulled
low
to
signal
the
remote
controller
that
the
sequence
is
complete.
Figure 5-2: GDS-68XP Power and Signal Wiring
ETHERNET
CONNECTION
The
GASMAX
CX
gas
monitor
includes
a
standard
RJ
‐
45
Ethernet
connection
on
the
main
I/O
board.
Both
fixed
IP
and
DHCP
‐
based
dynamic
IP
addressing
is
supported.
The
GASMAX
CX
supports
a
full
range
of
MODBUS
/
TCP
accessible
register
(see
Chapter
10)
as
well
as
a
built
‐
in
web
server
with
data
display
and
gas
detector
configuration
page.
J1
–
1:
+24VDC
Power
Input
J1
–
2:
4
‐
20mA
Analog
Out
J1
–
3:
Power
/
Signal
Common
Recommended
DC
Wire
Gauge
<
100
ft
#18
GA
100
to
500
ft
#16
GA
500
to
1000
ft
#14
GA
J6
– 1:
START:
Ground
to
Common
to
initiate
sequence
J6
–
2:
Common
J6
–
3:
DONE:
Open
Collector
Output,
pulled
low
when
sequence
complete
Access
to
optional
Alarm
Relays,
MODBUS
serial
ports
and
Ethernet
is
via
¾”
NPT
fitting
on
right
side
of