Allen-Bradley ASB Series E 1771-ASB Remote I/O Adapter Module User Manual

Below you will find brief information for Remote I/O Adapter Module ASB Series E 1771-ASB. The Remote I/O Adapter Module acts as an interface between remote I/O modules and programmable controllers. It transmits data up to 10,000 cable-feet (at 57.6K baud) and provides faster backplane scanning and data transmission up 2500 cable-feet at 230.4K baud. It can emulate series B adapters, providing system response similar to the 1771-ASB series B. This allows use of 1771-S4A and -S4B scanners which require slower response for proper operation. This module supports three methods of I/O addressing; 1/2-slot, 1-slot and 2-slot.

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Remote I/O Adapter Module ASB Series E 1771-ASB User Manual | Manualzz

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Key features

  • Transmits data up to 10,000 cable-feet
  • Provides faster backplane scanning
  • Supports 32-point I/O modules
  • Supports three I/O addressing methods
  • Backplane retries when noise detected
  • Enhanced diagnostic indicators
  • Emulates series B adapters

Frequently asked questions

The remote I/O adapter module requires a backplane current of 1.0A at 5V dc.

The remote I/O adapter module must be installed in the leftmost slot of the I/O chassis.

The maximum I/O chassis distance depends on the baud rate selected. At 57.6K Baud, the maximum distance is 10,000 feet. At 115.2K Baud, the maximum distance is 5,000 feet. At 230.4K Baud, the maximum distance is 2,500 feet.

For PLC-2 family processors, you must set the primary/complementary switches on both the S1 and S2 switch assemblies. Additionally, you need to set the last chassis switch on the backplane switch assembly.

For PLC-3 family processors, you must set the first I/O group number and I/O rack number switches on the S1 switch assembly. You also need to set the baud rate, scan, and link response switches on the S2 switch assembly.
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