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1771-SPI Allen-Bradley
Original price
$0.00
-
Original price
$479.96
Original price
$479.96
$0.00
-
$479.96
Current price
$479.96
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Product Details
Specifications provided for reference. Verify critical details against official manufacturer documentation before installation.
Product Overview
The 1771-SPI is an Allen-Bradley Bulletin 1771 SPI Protocol Interface Module for PLC-5 and 1771 I/O chassis systems. It provides asynchronous, half-duplex RS-485 SPI communication between the PLC and SPI-protocol peripheral devices. The module acts as a master, supporting logical device addressing and block-transfer data exchange. Typical applications include integration of SPI-protocol temperature or process controllers into industrial injection-molding or auxiliary equipment control systems. 1771-SPI facilitates data exchange such as setpoints, actual process values, and alarms.
Best Suited For
- Interface between PLC-5 and SPI-protocol auxiliary devices
- Injection-molding machine temperature or chiller controller integration
- SPI communication in block-transfer (BTW/BTR) control applications
- Master-mode SPI data exchange for process variables
Communication interface
RS-485, 2-wire, multi-drop
Protocol speed
1200 to 9600 bit/s
I/O addressing
128+ logical device addresses
Backplane load
1.3 A
Operating temperature
0 to 60 °C (32 to 140 °F)
Technical Specifications
I/O & Electrical
Backplane current load
1.3 A
Communication & Power
Communication interface
RS-485, 2-wire, multi-drop
Protocol speed
1200 to 9600 bit/s
Protocol format
Asynchronous, half-duplex
Data format
IEEE floating-point, block-transfer
Physical & Environmental
Operating temperature
0 to 60 °C (32 to 140 °F)
Storage temperature
-40 to 85 °C (-40 to 185 °F)
Relative humidity
5 to 95 % (without condensation)
