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Phone: +86 16626708626Description
Product Core Brief
- Model: 07AC91 (GJR5252300R0101)
- Brand: ABB
- Series: Advant Controller AC31 / CS31
- Core Function: 16-channel analog I/O remote module
- Product Type: Configurable input/output module
- Key Specs: 8 AI + 8 AO at 12 bits, 24 V DC supply
- Condition: New Surplus
Key Technical Specifications
- Channels: 16 total (8 in + 8 out at 12 bits; 16 at 8 bits)
- Input ranges: ±10 V (>100 kΩ) or 0-20 mA (~330 Ω)
- Output ranges: ±10 V or 0-20 mA (0-500 Ω load)
- Supply voltage: 24 V DC (20-28 V range), 0.2 A max
- Power dissipation: 5 W max
- Accuracy: Typ. 0.5%, max 1% (non-linearity)
- Temperature: 0°C to 55°C operation
- Isolation: Channel-to-channel, channel-to-bus
- Bus: CS31 system bus, up to 8 words in/out
- Terminals: Screw-type, max 2.5 mm² (shielded cable ≤100 m)
- Dimensions: 120 x 140 x 85 mm, 450
Product Introduction
ABB 07AC91 GJR5252300R0101 is a remote analog I/O module for CS31 system bus in Advant AC31 controllers. Configures as 8 inputs + 8 outputs at 12-bit (±10 V / 0-20 mA) or 16 channels at 8-bit via DIP switches.
Mounts on DIN rail for distributed setups, handles factory I/O without local processor. Pairs with 07AI91 inputs or 07DC91 RTDs in process plants. Field techs set mode before bus scan—verify polarity on current loops to avoid shorts.
Troubleshooting Quick Reference
| Symptom | Possible Cause | Relevance to this Part | Quick Check Method | Recommendation |
|---|---|---|---|---|
| No module LEDs, bus scan fail | 24 VDC dropout or bus terminator | ✅ High | Measure 24 V >22 V at supply pins; CS31 continuity | Check bus ends 120 Ω; power cycle head station |
| Outputs stuck at 0/20 mA | Enable input low or overload >500 Ω | ✅ High | Toggle binary enable 13-30 V; measure load <400 Ω | Clear short; verify DIP for current mode |
| Input reads drift >1% | Cable >100 m unshielded or ground loop | ✅ Medium | Resistance end-to-end <1 Ω; AGND to M <1 V | Single-end shield ground; twist pairs 0.5 mm² min |
| Channel 5+ dead in 8-bit mode | Pair config mismatch DIP 1-2 | ✅ High | Readback words packed 2-per; LEDs per channel | Flip to 12-bit test; document switches before change |
| Overheat >55°C under load | Blocked convection or 5 W draw | ❌ Low | IR gun on heatsink; fan air 50 CFM | 15 mm clearance sides; vertical mount terminals up |
Log CS31 diagnostics from head unit before reseat. Modules rarely fail—90% wiring or config. Photo DIP settings for support.
- 07AC91
- 07AC91
Frequently Asked Questions (FAQ)
12-bit vs 8-bit mode—when to use?
12-bit for precision loops (±10 V best <0.5% error). 8-bit packs 16 channels when speed trumps resolution. Set DIP before power—changes need bus rescan.
Max cable run from head station?
100 m shielded two-core >0.5 mm² on CS31 bus. Longer needs repeater. Twist analog pairs; ground shield one end only.
Hot-swappable on live bus?
Yes if power off locally—bus tolerates. Live insert risks spark on CS31 pins. Ground yourself first.
Current loop protection level?
Reverse polarity protected; open-wire detect alarms. Max 30 V compliance on outputs. Add 250 Ω external shunt for 1-5 V reads.
❗ Rookie config killer?
❗ DIP switches half-set—module dark, bus faults rack-wide. Document old positions, flip all or none. Stranded me 4 hours once.
Condition and incoming QC?
New Surplus: OEM pack, full 0-20 mA loop calibration on all 16 channels. No bent pins; bus handshake verified. Test reports ready.
Warranty, stock status?
1-year on functional faults. In stock, ships post 24-hour burn-in. Same-day if before noon
