Overview
The 1785-KE module is a communication interface that connects an intelligent RS-232-C (asynchronous) device to an Allen-Bradley Data Highway Plus network. It offers flexibility in communication protocols, allowing users to select between full duplex (unpolled) or half duplex (polled) modes for its asynchronous link.
Specifications
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Communication Rates
- Data Highway Plus: 57,600 bits per second
- RS-232-C Port: Switch selectable from 110 to 19,200 bits per second
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Functions
- Interfaces a programmable RS-232-C compatible device with an Allen-Bradley Data Highway Plus network
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Location
- 1771 I/O Rack
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Communicating Ports
- Data Highway Plus: 3-screw terminal block
- 1784-T50 Terminal: 9-pin male EIA D-shell connector
- Asynchronous (RS-232-C): 15-pin female EIA D-shell connector
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Cabling
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Asynchronous RS-232-C:
- Data Terminal Interface Cable (cat. no. 1770-CG or equivalent)
- Modem Interface Cable (cat. no. 1770-CP or equivalent)
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Data Highway Plus:
- User-supplied Data Highway Plus dropline cable (Belden 9463)
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Asynchronous RS-232-C:
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Power Requirements
- 1.2A @ 5VDC
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Ambient Temperature Rating
- Operational: 32°F to 140°F (0°C to 60°C)
- Storage: -40°F to 185°F (-40°C to 85°C)
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Ambient Humidity Rating
- 5% to 95% non-condensing
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