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Page 49
The DB25 control cable splice allows for much more convenient connection of control cable to the SteppIR
controller. By utilizing this connector splice, there is no need to cut the DB25 connector off and re-solder
when running cable through conduit. In addition, now you can purchase custom cable lengths to within 1
foot of your desired length, eliminating potential for excess cable. To install the DB25 control cable splice,
follow these instructions:
1.
Locate the parts needed for installation shown in
figure 5.20
.
2. Strip the grey jacket and aluminum shielding off of the control cable as shown in
figure 5.21
, approxi-
mately 2.75” from end of control cable, being careful not to damage the individual wires. Strip the plas-
tic insulation off of each of the control cable wires, approximately 0.25” in length should be bare wire.
It helps to twist each of the stranded wires, to aid in the placing of the wire into the terminal headers.
Tinning the wires also works well.
3. Connect each wire to the appropriate terminal as shown in
figure 5.22
. Consult
figure 5.27
on the next
page for the correct wiring sequence. Insert the two stainless steel screws into the circuit board. Slide
the two plastic spacers onto the screws.
4. Insert the first half of the strain relief clamp onto the two screws (half-round cutout facing upward) on
the two screws as shown in
figure 5.23
. Be careful not to pull the wires out of the terminal headers as
you push the strain relief clamp downward.
5. Insert the second half of the strain relief clamp onto the two screws (half-round cutout facing downward
as shown in
figure 5.24
. Position the control cable in between the two halves of the strain relief clamp,
be sure that the jacketing of the cable is in between the clamps. Using the nuts, tighten down until the
cable is nice and snug, but do not over-tighten.
6. Plug the DB25 splice into the back of the controller and tighten the jack screws to secure the DB25 to
the controller housing, as shown in
figure 5.25
.
7. While it is not required, you may optionally use silicone wrap to cover the wiring, as shown in
figure
5.26
.
CHAPTER FIVE
SECTION 5.2
WIRING THE CONNECTOR JUNCTION BOX (continued)
CONNECTING CONTROL CABLE TO dSUB FIELD SPLICE
2.75”
FIG. 5.20
FIG. 5.22
FIG. 5.21
FIG. 5.23
FIG. 5.25
FIG. 5.24
FIG. 5.26
