Description
- Model: GE IC660TBD024K
- Brand: GE Intelligent Platforms (now Emerson/GE)
- Series: Series 90-30 PLC Power Supplies
- Core Function: Redundant 24 V DC power supply module for PLC racks
- Type: Redundant Power Supply Unit (PSU)
- Key Specs: 24 V DC output 2 × supply inputs Redundancy logic
GE IC660TBD024K
Key Technical Specifications
- Input Voltage: Dual 24 V DC supply inputs
- Output Voltage: 24 V DC regulated bus
- Output Current: Up to rated load (per GE spec)
- Redundancy: OR’ing logic for power source failover
- Compatibility: Works with GE Series 90-30 chassis
- Mounting Style: DIN rail / rack slide
- Isolation: Input to output isolation per spec
- Operating Temperature: 0 °C to +60 °C typical
- Status Indicators: LED for OK / fault
- Protection: Short-circuit and overload protection
Application Scenarios & Engineering Pain Points
In distributed control systems and discrete PLC installations, stable power is not optional — it’s foundational. A glitch in the DC bus can cascade into CPU resets, I/O faults, and spurious trip conditions on critical equipment. I’ve seen a single power supply dropout create hours of troubleshooting because the ladder logic never latched into fault diagnostics properly.
The IC660TBD024K is not just another power supply; it’s a redundant supply module designed so you can feed a PLC rack from two independent 24 V DC sources. If one source drops, the module seamlessly continues the bus without causing a logic reset or rack brown-out.
Typical Applications
- Process Control Plants – Chemical / Petrochemical
Keeps Series 90-30 PLC racks alive during utility hiccups and power feed maintenance. - Manufacturing Lines – Automotive / OEM
Protects throughput from random resets during peak loads or UPS switchover. - Water & Wastewater Treatment SCADA Sites
Ensures remote PLCs maintain communications and control during brown-outs. - Mining / Heavy Industry
Withstands noisy plant power with a redundant feed to prevent step changes in control loops.
Case Example: Automotive Paint Line Outage Risk
Background:
A large automotive assembly facility suffered repeated line halts during peak shift changes. Each time, the PLC rack would reset briefly, enough to drop outputs and stop conveyors.
Problem:
The root cause wasn’t the CPU or I/O — it was power feed noise during UPS transitions. The original non-redundant supply would sag just long enough to reset the logic.
Solution:
Installed IC660TBD024K with dual 24 V DC sources. Bench tested with load bank and verified seamless transfer at 18 ms without PLC reset.
Result:
- Zero unplanned stops after installation
- Control network remained online through all UPS transfers
- Maintenance team added two more as strategic spares
Compatible Replacement Models
⚠️ Software/Hardware Compatible (Parameter Check Needed)
- Phoenix Contact QUINT ORING Module
- Provides redundancy at 24 V DC bus
- Requires external PSU pair
- Wall-mount versus DIN rail; check bus connections
- Siemens SITOP PSU8600 with Redundancy Module
- Similar redundancy logic
- Different backplane – requires adapters
Note:
There is no true drop-in replacement that uses the exact connectors and mounting of the Series 90-30 without some wiring adaptation. When Series 90-30 racks are still in service, the original IC660TBD024K remains the best match.
Troubleshooting Quick Reference
| Symptom | Likely Cause | Module Relevance | Quick Check | Recommendation |
|---|---|---|---|---|
| PLC resets randomly | Inadequate DC supply | ✅ High | Measure DC bus during sag | Consider redundancy module |
| LED not lit | No 24 V DC feed | ❌ Low | Check supply fuses and cables | Restore DC source |
| System holds with one source down | Normal function | ⚠️ Medium | Remove one supply | Redundancy working as intended |
| Rack bus undervoltage | Load too high | ⚠️ Medium | Check total current draw | Reduce load or add PSU capacity |
Field Insight
In my experience, power issues cause up to 40 % of PLC “mystery resets” — especially in older installations where PSUs were sized at bare minimum. A redundant supply like the IC660TBD024K doesn’t fix a grossly undersized bus, but it does prevent single-point failures on the DC feed.
