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Phone: +86 16626708626Description
Product Core Brief
- Model: 1KHL178025R0102P (COM02)
- Brand: ABB
- Series: Distributed Control Systems
- Core Function: Communication interface board
- Product Type: Network communication PCA
- Key Specs: Multi-protocol serial, backplane mount
- Condition: New Surplus
Key Technical Specifications
- Type: COM02 communication module
- Interfaces: RS-232/422/485 serial ports
- Protocols: Modbus RTU, ABB SNP, Profibus DP
- Power: 5 VDC backplane, <2 W consumption
- Temperature: 0°C to 60°C operation
- Isolation: 1.5 kV channel-to-bus
- Baud rates: 300 bps to 115.2 kbps
- Connectors: 9-pin D-sub, terminal blocks
- Dimensions: 100 x 150 mm PCB approx.
- Weight: 0.15 kg
Product Introduction
ABB 1KHL178025R0102P COM02 is a communication interface board for ABB DCS backplanes, handling serial protocols between controllers and field devices or HMIs. Mounts as daughter card or slot module in AC31/800xA racks.
Supports Modbus master/slave plus ABB native for remote I/O drops. Field installs link PLCs to SCADA over RS-485 up to 1200 m. Powers from backplane—no external supply. Set baud/DIP before bus scan; verify termination for Profibus.
Troubleshooting Quick Reference
| Symptom | Possible Cause | Relevance to this Part | Quick Check Method | Recommendation |
|---|---|---|---|---|
| No TX/RX LEDs on serial | Backplane +5 V dropout or fuse | ✅ High | Measure 5 VDC at power pins; continuity to host | Reseat connector; check host slot power <2 W total |
| Modbus timeout from master | Baud/parity mismatch or echo | ✅ High | HyperTerminal loopback pins 2-3; 9600 8N1 std | Match slave settings; disable echo in config |
| Profibus FDL errors rack-wide | Terminator missing or stub >3 m | ✅ Medium | 220 Ω across A/B lines at ends; segment scope | Add active terminator; max 32 drops per segment |
| Data garble on RS422 | Common mode >7 V or shield ground loop | ✅ High | Voltmeter A-B idle >0.2 V; ground differential | Single-end shield; isolator if >500 m run |
| Host no module detect | Address conflict DIP or EEPROM corrupt | ❌ Low | Readback ID register via bus tool | Clear EEPROM via programmer; document DIP photo |
Capture protocol analyzer trace before reset. Comms boards fail from spikes 75%—add surge protection. Photo LEDs/DIP for support.
- 1KHL178025R0102P COM02
Frequently Asked Questions (FAQ)
Protocols supported—Modbus RTU only?
No, Modbus RTU/ASCII plus ABB CS31, Profibus DP-V0 slave. Config via DIP or COM200 software. Max 247 addresses.
Max cable distance per port?
RS485: 1200 m at 9600 bps. Profibus: 100 m/12 Mbps segment. Use repeaters beyond; twist shielded pairs.
Hot-plug into live backplane?
No—arcs damage traces. Power down rack, insert, verify latch. ESD strap required.
Power draw from host slot?
<2 W typical at 5 VDC. Leaves headroom in 5-slot racks. No external PSU needed.
❗ Common config error?
❗ Echo enabled on half-duplex RS485—collides TX/RX. Disable via switch 3 OFF. Lost half-shift chasing ghosts.
Condition and test details?
New Surplus: OEM stock, full Modbus loop + Profibus scan test on bench rack. All ports verified; no bent pins. Reports available.
Warranty, stock status?
1-year comms failure. In stock, ships post protocol burn-in. Same-day dispatch.
