WhatsApp: +86 16626708626
Email: 
Phone: +86 16626708626Description
Product Core Brief
- Model: 07KT94-S H3 (GJR5252100R2201)
- Brand: ABB
- Series: Advant Controller AC31-S / CS31
- Core Function: Safety programmable logic controller
- Product Type: Safety-rated central processing unit
- Key Specs: 240 KB program, 24 VDC, 24 DI/16 DO/8 DC
- Condition: New Surplus
Key Technical Specifications
- Program memory: 240 KB flash
- Digital inputs: 24 at 24 VDC
- Digital outputs: 16 transistor 0.5 A at 24 VDC
- Digital configurable: 8 channels DI/DO/DC
- Analog inputs: 8 channels
- Analog outputs: 4 channels
- Serial interfaces: 2 x RS232
- Power supply: 24 VDC ±20%
- Operating temperature: -20°C to +60°C
- Bus interface: CS31 system bus
- Dimensions: 230 x 140 mm, 1.3 kg
- Safety rating: SIL3 capablenew.
- 07KT94-S
Product Introduction
ABB 07KT94-S H3 GJR5252100R2201 is a safety-rated central processing unit for AC31-S controllers on CS31 bus systems. Runs certified safety logic with 240 KB flash for emergency shutdowns and process interlocks in hazardous areas.
Handles mixed I/O including 24 fast inputs for E-stop chains and pulse outputs for drives. H3 firmware adds SIL3 diagnostics over base KT94. Installs as head station—needs 24 VDC and programming via COM200 software. Verify bus termination before scan.new.
Troubleshooting Quick Reference
| Symptom | Possible Cause | Relevance to this Part | Quick Check Method | Recommendation |
|---|---|---|---|---|
| No CPU RUN LED, bus dark | 24 VDC <20 V or CS31 open | ✅ High | Measure supply pins 22-26 VDC; bus continuity <1 Ω | Check head-end terminator 120 Ω; cycle power |
| Safety outputs all off | Interlock fail-safe trip | ✅ High | Read diagnostic words via COM200; clear latches | Reset E-stop chain; verify dual-channel feedback |
| Slow scan >50 ms | Program >240 KB or loop overload | ✅ Medium | COM200 task monitor: CPU load >90% | Split logic to remote drops; archive old code first |
| RS232 programmer no link | Baud mismatch or cable pinout | ✅ Low | 9600 8N1 default; loopback pins 2-3 echo | Null modem DB9; power cycle in STOP mode |
| Analog drift on AI3-5 | Reference drift or shield fault | ❌ Low | 1-5 VDC step cal; common mode <100 mV | Single-point ground shields; twist pairs 0.5 mm² |
Dump safety fault buffer (%MW100+) before clear. Safety CPUs lock from wiring 85%—check inputs first. Send logs with bus photo.
Frequently Asked Questions (FAQ)
SIL3 certified for safety chains?
Yes, TÜV-approved for SIL3 emergency stops. Dual-processor core with cross-check—program via certified COM200 blocks only.
H3 firmware vs base—what’s different?
Adds extended diagnostics, pulse train outputs for VFDs, and Modbus slave over RS232. Read sticker; flash via serial if upgrade needed.
Max CS31 drops from this head?
32 stations total, 100 m bus runs. Needs repeaters beyond—I’ve chained 28 with 4 AI modules no sweat.
Battery backup or retain?
Volatile RAM only—rewrites flash on STOP. Critical timers need remote CS31 clocks for holdover.
❗ Biggest gotcha on swap?
❗ Forgetting 120 Ω terminators on both bus ends. Comms timeout kills scan. Test continuity before power-up—stranded me overnight once.
Condition and test procedure?
New Surplus: OEM excess, full I/O exercise + safety trip test on bench CS31 rack. Cross-checked both CPUs; no bent pins. Reports available.
Warranty, shipping time?
1-year DOA. Stock ready, ships after 24-hour logic burn-in. Same-day dispatch.
