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Product Core Brief
- Model: ABB 07KT94 (GJR5252100R3261)
- Brand: ABB
- Series: Advant Controller 31 (AC 31)
- Core Function: Programmable logic controller basic unit
- Product Type: PLC central controller module
- Key Specs: Motorola 68030 32-bit CPU; 1 MB program memory; 24 V DC power
- Condition: New Original / New Surplus
- 07KT94 GJR5252100R3261
3. Key Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | GJR5252100R3261 |
| ABB Catalog ID | 07KT94 |
| Product Type | Advant Controller Basic Unit (PLC) |
| Control Series | Advant Controller 31 (AC 31) |
| Processor | Motorola 68030 32-bit |
| Program Memory | 1 MB |
| Data Memory | 128 kB |
| I/O Capacity | Up to 256 I/O points |
| Communication | Ethernet, RS-232C |
| Power Supply | 24 V DC |
| Dimensions | ~40 × 22.5 × 136 mm |
| Weight | ~0.6 kg |
| Mounting | Panel / rack installation |
| Typical Use | PLC logic and communications |
This module is used in industrial automation systems as the core PLC control unit for logic, I/O coordination, and communications.
4. Product Introduction
The ABB 07KT94 (GJR5252100R3261) is a basic controller unit designed for the ABB Advant Controller 31 (AC 31) industrial automation platform, functioning as a programmable logic controller (PLC) central module in process and discrete control systems. It runs on a 32-bit Motorola 68030 CPU with 1 MB of program memory and 128 kB of data memory, and connects to I/O, field devices, and engineering tools via Ethernet and RS-232C communications.
Powered by 24 V DC, the 07KT94 supports up to 256 programmable I/O points and handles complex control algorithms, timing, and communications tasks typical in Advant OCS or DCS installations. Verified OEM condition stock is essential for maintaining uptime in brownfield and legacy Advant Controller 31 systems.
5. Troubleshooting Quick Reference
| Symptom | Possible Cause | Relevance to this Part | Quick Check Method | Recommendation |
|---|---|---|---|---|
| No LEDs or power activity | 24 V DC supply missing or reversed | ✅ High | Measure 24 V DC at module terminals with meter | Confirm supply polarity and fuse; rectify supply before suspecting the controller |
| PLC not responding to HMI/SCADA | Comm settings mismatch (Ethernet/RS-232) | ⚠️ Medium | Check IP/port and serial settings in engineering software | Align communication parameters; reboot after change |
| I/O counts not updating | Addressing/configuration issue | ⚠️ Medium | Probe field I/O lines and logic program config | Verify I/O module addresses and program assignments |
| Module goes into fault state | Memory or CPU fault | ⚠️ Medium | Observe module fault LEDs and alarm codes | Reflash firmware or replace module with tested spare |
| Network link active but no logic execute | Program not running | ❌ Low | Read run/stop status from engineering station | Ensure program is loaded and in RUN mode |
Tip: On legacy Advant systems, many perceived controller faults stem from power supply glitches or communication parameter mismatches before the CPU itself. Always measure rails and confirm network settings first.
6. Frequently Asked Questions (FAQ)
Q1: What system is this module used in?
A: It’s part of the ABB Advant Controller 31 (AC 31) series, serving as the PLC central controller unit in industrial automation and process control systems.
Q2: What CPU does this controller use?
A: The 07KT94 is built around a 32-bit Motorola 68030 processor, suitable for handling advanced logic and data tasks in legacy DCS/PLC loops.
Q3: How much memory does it have?
A: It includes 1 MB of program memory and 128 kB of data memory, allowing storage and execution of substantial control logic relative to typical Advant configurations.
Q4: What communications interfaces are supported?
A: The module supports Ethernet and RS-232C ports, enabling linkage with HMIs, engineering stations, and field communication networks.
Q5: What power input does this module require?
A: It operates on 24 V DC, consistent with common plant control power rails for Advant Controller systems.
Q6: Why is this priced below OEM list?
A: This part is legacy/discontinued, so current listings are New Surplus or Refurbished Tested stock, not current factory production. Pricing reflects secondary market conditions and inventory age.
