Advantech ULI-234TCL Quick Start Manual

4
Loopback Test
• Use terminal emulation software such as
Hyper Terminal
• Set up for 9600 baud. Turn off local echo
• On ULI-234TCL, Jumper Data A (-) Out to
Data A (-) In
• On ULI-234TCL, Jumper Data B(+) Out to
Data B(+) In
• Type characters. Same characters should be
returned and LED's should flash
5
Troubleshooting
Timing Issues?
(Usually applies when using RS-485 2-wire)
Model BB-485OP uses RC time constant. This means that, when
you are setting the DIP switches for the "baud rate", you are setting a
turnaround time, not a "baud rate".
Sometimes, the turnaround time on an RS-485 2-wire device does
not match the turnaround time that is set on the BB-485OP converter,
even though they are both set for the same baud rate. Refer to the
chart in Step 3 to match the turnaround time of your RS-485 2-wire
device. If you do not know the turnaround time of your device, you can
do the following:
• Keep your device at its current baud rate, but change the
"baud rate" on the BB-485OP. Set it for one or two steps
above or below the baud rate of your device until you get
communication.
Note: Do Not use the shield drain wire as the Signal Ground between
RS-422/485 devices. RS-422/485 systems may communicate
successfully without the Signal Ground when nodes are located
close together and circuit grounds for all nodes are at the same
potential – e.g., a controlled lab environment. However, this practice
is not recommended. If a Signal Ground is not used when nodes
are separated by distance, and there is the possibility of lightning
and/or other electrical noise, the common mode voltage can rise to
levels that could compromise communications, or even damage the
transceivers in the system nodes.
Documenatation Number: 710-10767-00_r3_485OP_5023qsg
Installation Information
Underwriters Laboratories Conditions of
Acceptability – When installed in the end-use
equipment, consideration should be given to the
following:
1. The wiring terminals are suitable for factory
wiring only.
2. This device is to be mounted in a suitable
enclosure in the end-product.
3. This device is suitable for operation at a
maximum surrounding air temperature as
described in the documentation.
4. These devices are intended for use in a pollution
degree 2 environment.
• Input Voltage: 10 – 14 VDC
• Input Power: 1.0 Watt
• Wire Range: 22 – 14 AWG
• Tightening Torque: 0.5 Nm
• Temperature rating of field installed conductors is
105 °C minimum, sized for 60 °C ampacity.
• Use copper wire only maximum surrounding
ambient air temperature 55 °C.
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QUICK START
GUIDE
ULI-234TCL
Model: BB-485OP
RS-422/485 Optically Isolated Repeater
Before you begin, be
sure you have the following:
+ BB-485OP Repeater
+ 12 VDC Wall Power Supply
with Stripped & Tinned Leads
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