IP91-A | Yokogawa S9881BM-0 Communication Board

Product Overview

The Yokogawa IP91-A (assembly number AS S9881BM-0) is a communication board module designed for Yokogawa industrial automation control systems. It serves as the primary communication interface between the process control unit and the system network, enabling reliable data exchange and system coordination within Yokogawa DCS architectures.

Key Specifications

• Model Number: IP91*A AS S9881BM-0
• Product Type: Communication Board / Interface Module
• Power Supply: 24 V DC +10% / -10%
• Max Current: Up to 8.0 A
• Overvoltage Protection: 32 V or lower detection level
• Withstand Voltage: 500 V AC (output to ground, 1 minute)
• Mounting: DIN rail or wall mount (4 x M4 screws)
• Weight: 0.9 kg
• Dimensions: 25.4 x 5.1 x 38.1 cm
• Operating Temperature: -20°C to +70°C

Features and Benefits

• Robust 24 V DC power input with overvoltage protection safeguards downstream components
• High current capacity up to 8.0 A supports multiple communication channels
• Flexible mounting options include DIN rail and wall mount configurations
• Compact form factor fits standard industrial control enclosures
• Designed for seamless integration into Yokogawa control system backplanes
• Reliable data transmission ensures continuous system communication integrity

Applications

• Process control unit network interface in Yokogawa DCS
• Communication bridge between field control units and operator stations
• Industrial automation systems requiring Yokogawa proprietary bus communication
• System upgrades and maintenance of legacy Yokogawa control architectures

FAQ

Q: What does the suffix *A indicate on the IP91 module?
A: The suffix letter denotes the hardware revision level. IP91*A is Revision A. Verify compatibility with your specific Yokogawa system version before ordering.

Q: What is the assembly number for IP91-A?
A: The assembly number is AS S9881BM-0, which identifies the specific PCB revision and manufacturing batch.

Q: Can this module be mounted on DIN rail?
A: Yes. The module supports DIN rail mounting (A2BN3D-0) as well as wall mounting with four M4 screws (A2BN3D-1).

Q: What is the maximum current draw?
A: The module supports up to 8.0 A at 24 V DC with +10% / -10% tolerance.

Installation Guide

1. De-energize the system before installing the communication board
2. Select mounting method: DIN rail clip or four M4 screws for wall mount
3. For DIN rail: clip the module onto a 35 mm symmetrical rail
4. For wall mount: mark and drill holes, secure with M4 screws
5. Connect 24 V DC power observing correct polarity
6. Attach communication cables to the module terminals
7. Energize and verify RUN status LED indicates normal operation

Selection Tips

• Select IP91-A for Yokogawa DCS communication interface applications
• Verify the assembly number AS S9881BM-0 matches your system requirements
• Confirm mounting style (DIN rail or wall) before ordering accessories
• Ensure power supply can deliver up to 8.0 A at 24 V DC
• For redundant configurations, order two modules for primary/backup setup