RKI Instruments GD-K71D4X - Manual (Page 7)

Model GD-K71D4X Sample Draw Transmitter • 4
3. Connect another length of sample tubing to the other side of the sample filter and
route it to the sampling 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.
4. Attach 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-K71D to a Controller
WARNING: Always verify that power to the GD-K71D4X and to the controller are off
and that the controller’s and GD-K71D4X’s power switches are in the off
position before making wiring connections or adjustments.
1. Turn off power to the controller and the GD-K71D4X.
2. Place the controller’s and GD-K71D4X’s power switches in the OFF position.
3. Use the conduit hubs at the bottom of the GD-K71D4X for routing power and signal
cables into the enclosure. Route any relay wiring through one conduit hub, and
3-conductor shielded cable, or 3 wires in conduit through the other conduit hub to
minimize crosstalk.
Figure 3: Customer 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 connected it at the GD-K71D4X.
12
4 - 20 mA In (S)
- (DC Ground)
Cable Shield
External Power
Source
(-) N
Alarm
Device
(+) H
+ 24 VDC
NO NO
TR
NO
ALM2 ALM1
1 3 4 5 6 7 2
(+) H
GD-K71D Terminal Strip
Not Used
9 10 11 8
External Power
Source
(-) N
External Power
Source
(+) H Controller
Alarm
Device
Alarm
Device
(-) N