Communication to Controller

PRO22R1-Reader Interface

Installation

The Interface communicates to a controller via a half duplex multi-drop RS-485 interface. The total cable length is limited to 4,000 feet (1,200 meters). Shielded cable of 24AWG with charac- teristic impedance of 120 ohm and <13pf/ft capacitance is speci- fied for the RS-485 interface. The last devices on both end of the cable should have the termination installed (set jumper J4 on).

Represents that the shield must be grounded on one end.

Each Interface must be configured to have a unique address and correct baud rate. The address and baud rate are selected by installing the specified jumpers. Use 38400 as the standard Baud rate setting. See the following diagram.

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