Table of Contents
Advertisement
Instruction Manual Rev B
RS/485 Communications and connection
Port 2, 6-pin R J25 connector. Pin 1 (+), Pin 6 (-). RS-485 cabling may be up to 2000 feet in length. Belden P/N 3106A
cable is recommended. Note: Cable drawing and pin out at the end of drawing section.
If not specified in the original order default is as follows. NOTE: The following communication parameters cannot be
changed in the field contact the factory.
Baud Rate 9600
Data Bits 8
Parity None
Flow Ctrl None
Timeout 0.2 seconds.
RS485: Pin out
Use RS485 to create a multi-drop network containing up to 32 devices.
Note: port #1is set to RS485
Note that the ports are not isolated.
If controller is used with a non-
isolated
external
potential voltage that exceeds +/-
10V. To avoid damaging the system,
all non-isolating device ports should
relate to the same ground signal.
Use shielded, twisted pair cables.
Minimize the stub (drop) length leading from each device to the bus.
Ideally, the main cable should be run in and out of the network device.
Do not cross positive (A) and negative (B) signals. Positive terminals must be wired to positive and negative
terminals to negative.
device,
avoid
27
Advertisement
Table of Contents
