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User ’s Guide
BD9-C2, BD9-C4 (CN9 SERIES)
Communications option installation guide
SM
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OMEGA
CARE
Extended Warranty
Program
Introduction
The CN9 series controllers can all be ordered or
retrofitted with either an RS232 or RS485 serial
communications interface board. If the controller has the
communications interface fitted then skip to the section
titled Installation/Cabling.
Feature RS232 RS485
Type of transmission lines Unbalanced Differential
Maximum number of drivers 1 128
Maximum number of receivers 1 128
Maximum cable length 15m 1200m
Maximum data rate 19.2Kb/sec 19.2Kb/sec
Maximum CMV +/- 25V +12 to -7V
Table lists the features of both RS232 and RS485 standards.
Cable: To ensure data integrity over long transmission
distances, it is recommended that good quality RS485 cable
is used.
Recommended: RS485: Belden 9841, RS232: Belden 9501
2
FITTING A COMMUNICATIONS INTERFACE BOARD
The RS232 and RS485 interface boards are interchangeable
and are fitted in exactly the same way, please read the fitting
and safety instructions before proceeding.
Caution: Live circuits can hold charge for short
periods after isolation from the voltage supply.
Electrostatic precautions should be observed
when handling the controller outside the sleeve.
After isolating the controller from it’s supply, the controller
front bezel and circuit board assembly can be unplugged
from the sleeve. Grasp the bezel firmly by the recesses on
each side and pull. A screwdriver can be used as a lever if
required.
To fit the RS232 or RS485 interface you will require the
following parts, which are supplied with the interface.
Nylon Nut
Brass Nut
Nylon Bolt
Nylon Spacer
Insert the Nylon Bolt into the 3mm diameter hole
at the bottom left hand corner of the controllers
printed circuit board
Place spacer over Nylon bolt thread.
Screw the Nylon Nut onto the bolt.
Do not overtighten as this will damage the screw
thread.
Plug the 5-way female connector on the Comms
Board into the 5-way male connector on the
Controller board ensuring that connectors are all in
alignment. At the same time ensure the hole in the
Comms board fits over the screw thread.
Screw the Brass Nut onto the Comms board.
Do not overtighten but ensure it’s tight enough to
stop the board from moving.
Cut the top of the screw thread so that it is level
with the top of the Brass Half Nut.
3
Now you are ready to refit the Controller into
its case. To do this carefully slide the PCB into
the case aligning it with the connector arms
at the rear, and then press the bezel
assembly firmly into the sleeve until the latch
clicks in order to compress the gasket and
seal to NEMA4/IP66.
Diagram 1