Allen-Bradley |1771-A1B| Remote I/O Adapter Module
Description
The 1771-A1B is a remote I/O adapter module in the Allen-Bradley 1771 series, designed to interface between remote I/O modules and programmable controllers. This module supports various I/O configurations, including 4, 6, 8, 16, or 32 points, and offers three methods of I/O addressing: 1/2-slot, 1-slot, and 2-slot. The 1771-A1B can emulate Series B adapters for compatibility with certain scanners that require slower response times.
Features
- Data Transmission: Supports data transmission up to 10,000 cable-feet at 57.6K baud and up to 2,500 cable-feet at 230.4K baud.
- Communication: Receives/sends data from/to the I/O scanner in serial form and reads/writes data from/to input/output modules in parallel form.
- Configuration Verification: Checks I/O configuration on power-up to verify correct module placement.
- Slot Scanning: Scans all slots in the chassis or all but the last four slots, improving scan time and saving I/O image space.
- Diagnostic Indicators: Enhanced diagnostic indicators for easier troubleshooting.
- Compatibility: Can emulate Series B adapters for use with 1771-S4A and -S4B scanners.
Technical Specifications
-
Transmission Distance:
- Up to 10,000 cable-feet at 57.6K baud
- Up to 2,500 cable-feet at 230.4K baud
-
I/O Support:
- Supports any mix of I/O (4, 6, 8, 16, or 32 points)
- Supports 32-point I/O modules using adjacent slot's unused word
-
Addressing Methods:
- 1/2-slot, 1-slot, and 2-slot addressing
-
Power-Up Check:
- Verifies I/O module placement during startup
-
Scan Time:
- Scans all slots or all but the last four slots for improved performance
-
Diagnostic Features:
- Includes ACTIVE (green), ADAPTER FAULT (red), and I/O RACK FAULT (red) indicators
-
Emulation:
- Can emulate Series B adapters for backward compatibility
-
Thermocouple Compatibility:
- Not compatible with 1771-IX or 1771-IY thermocouple input modules unless using 1771-IXE
Installation and Configuration
-
Configuration Plugs:
- Set in the left position for 32-point I/O modules
- Set in the right position for 1771-IX and 1771-IY modules
-
Switches:
- S1 and S2 switches should be set with a blunt, pointed instrument
- Switches labeled ON and OFF; OPEN corresponds to OFF
Troubleshooting
-
Rack Fault Monitoring:
- Monitor processor rack fault bits and block transfer error bits
- Use diagnostic step array and timer to monitor digital inputs
-
Block Transfer Errors:
- For certain scanners, set link response for unrestricted or Series B emulation
-
Autoconfiguration Issues:
- Check adapter power, wiring, connections, and switch settings
- Create a new I/O status file and reconfigure the scanner channel
-
Adding New Racks:
- The processor must be in Program mode to add or autoconfigure remote I/O devices
Allen-Bradley |1771-A1B| Remote I/O Adapter Module
Current product
Current
Vendor:
Allen-Bradley
Allen-Bradley |1771-A1B| Remote I/O Adapter Module
Regular price
$260.00
Sale price
$260.00
Regular price
$499.00
Options
Descriptions
Description
The 1771-A1B is a remote I/O adapter module in the Allen-Bradley 1771 series, designed to interface between remote I/O modules and programmable controllers. This module supports various I/O configurations, including 4, 6, 8, 16, or 32 points, and offers three methods of I/O addressing: 1/2-slot, 1-slot, and 2-slot. The 1771-A1B can emulate Series B adapters for compatibility with certain scanners that require slower response times.
Features
- Data Transmission: Supports data transmission up to 10,000 cable-feet at 57.6K baud and up to 2,500 cable-feet at 230.4K baud.
- Communication: Receives/sends data from/to the I/O scanner in serial form and reads/writes data from/to input/output modules in parallel form.
- Configuration Verification: Checks I/O configuration on power-up to verify correct module placement.
- Slot Scanning: Scans all slots in the chassis or all but the last four slots, improving scan time and saving I/O image space.
- Diagnostic Indicators: Enhanced diagnostic indicators for easier troubleshooting.
- Compatibility: Can emulate Series B adapters for use with 1771-S4A and -S4B scanners.
Technical Specifications
-
Transmission Distance:
- Up to 10,000 cable-feet at 57.6K baud
- Up to 2,500 cable-feet at 230.4K baud
-
I/O Support:
- Supports any mix of I/O (4, 6, 8, 16, or 32 points)
- Supports 32-point I/O modules using adjacent slot's unused word
-
Addressing Methods:
- 1/2-slot, 1-slot, and 2-slot addressing
-
Power-Up Check:
- Verifies I/O module placement during startup
-
Scan Time:
- Scans all slots or all but the last four slots for improved performance
-
Diagnostic Features:
- Includes ACTIVE (green), ADAPTER FAULT (red), and I/O RACK FAULT (red) indicators
-
Emulation:
- Can emulate Series B adapters for backward compatibility
-
Thermocouple Compatibility:
- Not compatible with 1771-IX or 1771-IY thermocouple input modules unless using 1771-IXE
Installation and Configuration
-
Configuration Plugs:
- Set in the left position for 32-point I/O modules
- Set in the right position for 1771-IX and 1771-IY modules
-
Switches:
- S1 and S2 switches should be set with a blunt, pointed instrument
- Switches labeled ON and OFF; OPEN corresponds to OFF
Troubleshooting
-
Rack Fault Monitoring:
- Monitor processor rack fault bits and block transfer error bits
- Use diagnostic step array and timer to monitor digital inputs
-
Block Transfer Errors:
- For certain scanners, set link response for unrestricted or Series B emulation
-
Autoconfiguration Issues:
- Check adapter power, wiring, connections, and switch settings
- Create a new I/O status file and reconfigure the scanner channel
-
Adding New Racks:
- The processor must be in Program mode to add or autoconfigure remote I/O devices
