Configured for high-speed network integration in industrial automation environments, the Yokogawa IP91A-A, also cataloged as the IP91-A Communication Module, provides direct physical/electrical execution to manage data transfers between distributed control architectures and external nodes. The hardware operates as a centralized bus interface component within Yokogawa Centum XL and micro XL platforms, executing multi-protocol serialization to route discrete and analog process variables without software-induced bottlenecks.
| Parameter | Specification |
|---|---|
| Model | IP91A-A |
| Brand | Yokogawa |
| Origin | USA |
| Weight | 0.9 kg |
| Dimensions | 25.4 cm x 5.1 cm x 38.1 cm |
| Operating Temp | -20 to 70 deg C |
| Power Consumption | Less than or equal to 15 W |
| Protocols Supported | Ethernet/IP, Modbus/TCP, Profinet, OPC-UA, MQTT, CANopen, Profibus, RS-232/RS-485 |
| Data Transfer Rate | Up to 1 Gbps |
| Interface Type | RJ45 Ethernet, Physical Serial Ports |
| Power Supply | 8-36 V DC (Typical 24 V DC) |
| Communication Standards | IEEE 802.3, IEC 61158 |
| Enclosure Rating | IP67 |
The module establishes a deterministic communication link utilizing concurrent fieldbus and industrial Ethernet topologies. To protect internal digital system logic from transient variations on long-distance copper links, the hardware integrates channel-to-channel isolation networks that block external voltage differentials. The communication processor systematically scans connected segments, executing protocol translations across Modbus/TCP, Profinet, and legacy RS-232/RS-485 interfaces natively. This native processing path guarantees stable frame validation and ensures that data exchange between the central processing unit backplane and remote field devices maintains synchronized timing loops under peak traffic conditions.
Q: How does the module handle backplane current consumption when multiple communication ports operate at a full 1 Gbps data transfer rate?
A: The hardware incorporates independent internal switching regulators to distribute thermal dissipation. Under maximum data throughput utilizing all available physical links, power consumption stabilizes below 15 W, drawing current from the primary 24 V DC supply rails without exceeding backplane electrical load allowances.
Q: What actions occur during a sudden loss of network communication on an active RS-485 serial segment?
A: The module executes built-in diagnostic checks to detect termination faults or line breaks. Upon verifying a loss of signal, it sets a hardware error flag on the Centum XL system bus, forcing the specific channel data inputs to a fail-safe state while maintaining active processing on adjacent Ethernet segments.
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