Description
1. At-A-Glance Executive Brief
- Model: COM0023 (2RCA007120D / 2RCA007128A0001C)
- Brand: ABB
- Part Type: Communication and Control Module (COM ANSI)
- Lifecycle Status: Active / Legacy Support Tier
- Core Protocol: RS-232, RS-485, and RJ45 Ethernet
- System Compatibility: IEC Capacitor Bank Protection and Control Systems
2. Technical Introduction
Managing reliable serial and network telemetry across high-voltage capacitor bank protection schemes requires specialized communication hardware that can withstand heavy electrical sub-station noise.
Substation automation systems often fail when field interface cards lack the proper port isolation or protocol conversion capabilities needed to bridge legacy serial devices with modern control networks.
The ABB COM0023 module solves this problem by supplying dedicated ANSI communication interfaces—including RJ45 Ethernet and multi-channel RS-232/RS-485 serial ports—directly within the protection I/O rack. It handles data aggregation and protocol translation for protection relays, ensuring deterministic command execution and real-time telemetry streaming across the substation network architecture.
3. Core Technical Specifications
| Parameter | Value |
| Product ID / Catalog Code | 2RCA007120D / 2RCA007128A0001C |
| Communication Ports | RJ45 Ethernet, RS-232, Dual RS-485 |
| Target Application | IEC Capacitor Bank Protection & Control |
| Mounting Type | Subrack / Modular rack insertion |
| Operating Temperature | -25°C to 55°C (-13°F to 131°F) |
| Relative Humidity | Up to 95% non-condensing |
| Enclosure Protection | IP20 module housing |
| Gross Weight | 0.3 kg (0.66 lbs) |
4. Field Engineer’s Tech Notes
- RS-485 Bias Resistor Tuning: When wiring long-distance serial communication loops to the RS-485 terminals, verify that external line biasing and terminating resistors are correctly configured to prevent floating bus states and packet drops during transient electromagnetic interference events.
- Shield Grounding Protocols: Terminate all communication cable shields at the designated cabinet grounding stud rather than the module backplane pins to eliminate ground loops induced by high-voltage switching in adjacent breaker compartments.
5. Adaptive QA & Testing Protocol
Bench verification involves testing the RJ45 Ethernet port for packet integrity and line speed negotiation using a network traffic analyzer. The RS-232 and dual RS-485 serial channels undergo loopback testing at maximum baud rates to verify transceiver health and command response handling. Full functional test reports and digital diagnostic logs are available upon request prior to dispatch.
6. Buyer’s FAQ
- What warranty terms apply to this communication module? All units include a standard 12-month operational warranty covering manufacturing defects and hardware performance.
- Is this part supplied as New Surplus or refurbished? We stock both factory-sealed New Surplus (NSFP) and fully bench-tested refurbished variants depending on your project lead time constraints.
- How fast can an emergency replacement unit ship out? Expedited same-day global air shipping is available for all in-stock inventory to minimize outage time during critical sub-station maintenance.
