Wiring the gd-k77d to a controller – RKI Instruments GD-K77D4X-XX User Manual
Page 8
5 • Model GD-K77D4X-XX Sample Draw Transmitter
sample area. Be sure to keep the length to a minimum. Consult RKI Instruments, Inc.
for lengths of more than 20 feet.
CAUTION:
Avoid loops or slumps in the incoming sample line. To reduce response time, keep the
incoming sample line as short as possible.
3.
Install 1/4’’ O.D. x 1/8” I.D. Teflon PTFE sample tubing to the gas out fitting. Route
the opposite end of the tubing to an open area where the sample can safely disperse or
to an exhaust duct.
Wiring the GD-K77D to a Controller
WARNING: Always verify that power to the GD-K77D4X-XX and to the controller are
off and that the controller’s and GD-K77D’s power switches are in the off
position before making wiring connections or adjustments.
1.
Turn off power to the controller.
2.
Place the controller’s and GD-K77D’s power switches in the OFF position.
3.
Use the conduit hubs at the bottom of the GD-K77D4X-XX for routing power and
signal cables into the enclosure. Route any relay wiring through one conduit hub, and
a 3-conductor shielded cable, or three wires in conduit, for controller connections
through the other conduit hub to minimize crosstalk.
Figure 4:
External Wiring
4.
If shielded cable is used for controller wiring, connect the cable shield’s drain wire to
a chassis ground at the controller, but do not connect it at the GD-K77D4X-XX.
8
NO
ALM2
ALM1
NO
TR
NO
5
7
6
12
11
10
9
3
1
2
ALARM
DEVICE
ALARM
DEVICE
Not
Used
+ 24 VDC
- (DC Ground)
Cable Shield
ALARM
DEVICE
GD-K77D Terminal Strip
4
4 - 20 mA In (FB)
Controller