EHB-100
USER MANUAL
v1.0
1723 W. 4th Street Tempe Arizona 85281
P
: 800.638.6104 |
F
: 480.966.6728 |
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Page 8
Preparing RS232 Cable
What you will need:
• A two-conductor cable with ground terminated with DB9 connectors or not
• Wire strippers
• Screwdriver (flat head)
• 3.5mm captive screw connector with 3 positions (included with plate)
• Heat gun and heat shrink (optional)
• Multimeter (optional)
Depending on your setup, you will need an RS232 cable with terminal block on one end to connect to the unit
and either another terminal block or DB9 on the other side. The focus of this section will be on terminating the ter-
minal block side with the proper pinout because that is what is connected to the unit. The other end of the cable
is dependent on what the unit is connecting too, but all the information in this section will help to get the proper
pinout in any case. As a tip, if connecting to a computer without a serial port, a USB to serial port converter can be
used to communicate with RS232.
If the cable is terminated on both sides, start by cutting off the end that will be used for connecting to the unit.
Then, strip the outer jacket of the cable back by about 1 inch like what is shown in Step 1 below. Once the outer
jacket is removed, you can optionally add heat shrink around the conductors and over the exposed drain wire like
in the picture of step 2. Next, strip the ends of the conductors back about 3/16” in order to make good contact in-
side of the captive screw connector. The final step is to attach the captive screw connector to the end of the cable
matching the conductors on the other side of the cable to what is shown in step 3, use the connectors shown in
the following figure as a reference if using DB9 male or female. Test the conductors with a multimeter to confirm
termination.
