Description
Key Technical Specifications
| Parameter | Specification |
|---|---|
| Product Model | PCD232A101 |
| ABB Type | PC D232 A |
| ABB Product ID | 3BHE022293R0101 |
| Product Name | PEC80-CIO |
| Product Type | Combined Input Output device |
| System Family | UNITROL 6000 |
| Control Platform | AC80 PEC |
| Power Supply | Redundant 24 VDC |
| Supply Voltage Range | 20–28 VDC |
| Maximum Supply Current | 2 A |
| Ethernet | 4 × 10/100 Mbps |
| Panel Interface | RS232 |
| Modbus Interface | RS485 |
| CAN Interface | RS485 CAN open interface |
| Digital Inputs | 12 isolated channels |
| DI Configuration | 2 groups × 6 channels, 24/48 V |
| DI Input Current | Typically 6 mA |
| DI Isolation Test | 500 Vrms |
| Polling Voltage | 24 V |
| Polling Supply Current | 85 mA maximum |
| Relay Outputs | 16 channels |
| Relay Switching Voltage | 250 VAC |
| Relay Switching Current | 10 A |
| Relay Isolation Test | 500 Vrms |
| Analog Inputs | 3 channels |
| AI Voltage Range | −10 to +10 V |
| AI Current Range | −20 to +20 mA |
| AI Burden Resistance | 50 Ω |
| AI Accuracy | <1% FSR |
| AI Bandwidth | 2 kHz |
| Analog Outputs | 3 channels |
| AO Voltage Range | −10 to +10 V |
| AO Maximum Current | 5 mA |
| AO Accuracy | <1% FSR |
| Temperature Inputs | 3 interfaces |
| Temperature Sensors | PT100 / PTC |
| PT100 Measurement | −40 to +240°C |
| PT100 Accuracy | <1.5°C |
| PTC Switching Resistance | 500 Ω |
| Device Address | 0–15 |
| Operating Temperature | −25 to +70°C |
| Relative Humidity | 5–95% at +40°C |
| Vibration Standard | IEC 60255-21 |
| EMC Standard | IEC/EN 61000 |
These specifications come from the PEC80-CIO datasheet. ABB’s UNITROL 6000 spare-parts documentation also explicitly identifies 3BHE022293R0101 as PC D232 A: PEC80-CIO — CIO Combined Input Output.
Product Introduction
The ABB PCD232A101 3BHE022293R0101 is the PC D232 A PEC80-CIO, a combined input/output device designed for UNITROL 6000 systems. It is based on ABB’s AC80 PEC control platform and integrates the PEC80 control, processor, power-supply, and optical-interface functions with application I/O. ABB documentation describes it as a general-purpose interface device providing digital and analog I/O within UNITROL 6000 systems.
This is not simply an I/O expansion card. The device includes four-port Ethernet switching, RS485 Modbus, CAN, an RS232 panel interface, analog I/O, relay outputs, digital inputs, temperature inputs, and an optical interface. Two PC D232 A devices can also be used to provide redundancy of the system interfaces.
PCD232A101
Engineering Pain Point
The main replacement issue with PCD232A101 is confusing the PEC80-CIO with a conventional PLC I/O module. The PC D232 A incorporates the PEC control platform and communicates with other UNITROL 6000 components, so replacing it is an architecture-level task rather than a simple channel-for-channel I/O swap. The original configuration, software, device address, communication links, and redundant arrangement should be recorded before removal.
Typical Applications
- UNITROL 6000 generator excitation systems for integrated control, measurement, and application I/O.
- Generator excitation panels requiring analog and digital signal acquisition and output.
- Excitation-system communication through Ethernet, Modbus, CAN, and the ABB panel interface.
- Redundant UNITROL 6000 architectures using two PC D232 A devices for system-interface redundancy.
Technical Pitfalls to Avoid
- Do not confuse PCD232A101 with PC D230 or PC D231. ABB lists PC D230 as a Communication Control Measurement component and PC D231B as a Converter Control Interface, while PC A is specifically the PEC80-CIO combined I/O device.
- Verify the complete ABB article number. The correct identification is 3BHE022293R0101. The datasheet also gives the ordering code as PC A0101.
- Do not assume the 16 relay outputs are suitable for any 250 VAC / 10 A load. Those are the stated switching ratings; actual load type, inrush, inductive characteristics, and cabinet protection still need to be checked.
- Check the redundant 24 VDC supply arrangement. The specified input is 20–28 VDC and the unit supports redundant supply inputs. Power wiring should match the installed UNITROL architecture.
- Record the device address before replacement. The documented address setting range is 0–15. A replacement with an incorrect address can create communication or system-identification problems even when the hardware is correct.
- Check analog signal type carefully. The three analog inputs accept either −10 to +10 V or −20 to +20 mA, with a specified 50 Ω burden. Do not assume every connected signal is voltage based.
- Temperature inputs are not generic analog channels. The dedicated interfaces are intended for PT100 or PTC sensors, with a documented PT100 range of −40 to +240°C.
- Verify the optical and PEC links during commissioning. The PC A includes an optical module interface and supports communication with the broader PEC/UNITROL architecture. A successful power-up alone does not prove that the system-level communication path is correct.
Related Products
- ABB PC D230 3BHE022291R0101 — UNITROL 6000 Communication Control Measurement component; different function from the PC A .
- ABB PC D231 B 3BHE025541R0101 — Converter Control Interface used in UNITROL 6000; not a direct PCD232A101 replacement.
- ABB PC D235 A 3BHE032025R0101 — FU combined I/O variant with FPGA; the different article number requires configuration verification before substitution.
- ABB PP D113 B01-20-111000 3BHE023784R2030 — AC800PEC controller with FPGA size 10K; this is a separate controller product rather than the combined I/O device.
- ABB PP D113 B01-23-111000 3BHE023784R2330 — AC800PEC controller variant with PROFIBUS; different role and article number.
- ABB PP D113 B01-25-111001 3BHE023784R2530 — AC800PEC controller variant with Modbus TCP.
- ABB PP D113 B01-26-111001 3BHE023784R2630 — AC800PEC controller variant with Modbus RTU.
- ABB PC D530 A102 3BHE041343R0102 — UNITROL 6000 X-power G2 standard controller board; substantially different hardware role.
Procurement Note
For PCD232A101, specify all three identifiers when possible:
→ PC A0101 → 3BHE022293R0101
Also verify the installed UNITROL 6000 configuration, device address, firmware/software compatibility, redundant power arrangement, optical connections, and application I/O wiring before commissioning. ABB’s documentation identifies this exact article as a UNITROL 6000 component, so a generic “ABB controller” description is not adequate for procurement.
