Omega Products BD9-C2 Installation Manual

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User ’s Guide
BD9-C2, BD9-C4 (CN9 SERIES)
Communications option installation guide
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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
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