Black Box IC109A-R2, IC109C Installation, RS-485 driver to be enabled via the RS-232 control lead

CHAPTER 3: Installation

7.Since all the remote PLC stations must be inactive until addressed, the RS-485 driver of each remote RS-232↔485/422 Converter must not be constantly enabled (W9 of each remote RS-232↔485/422 Converter must be set to a position other than ON). The remote PLCs are fairly far from the industrial controller in our example, so it would be wise to set the CTS Delay (jumper W9) for 10 msec. This allows the line to stabilize after a remote PLC becomes active but before it starts to transmit.

8.Set jumper W9 on the RS-232↔485/422 Converter connected to the industrial controller to the ON position. This allows the industrial controller to transmit to the remote PLCs without having to wait for any delay period.

9.Set jumper W15 of each remote RS-232↔485/422 Converter and the master RS-232↔485/422 Converter to the A-B position. This allows the

RS-485 driver to be enabled via the RS-232 control lead.

10.Jumpers W16 and W17 are not used in this application and may be set in any position without affecting the operation of the unit.

11.This completes the configuration procedure. The system can now be activated.

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