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3. Key Technical Specifications
| Parameter | Value |
|---|---|
| Catalog Number | 2364-SPM03A |
| Manufacturer | Reliance Electric (Rockwell Automation) |
| Input Voltage | 3-phase 200–240 VAC ±10%, 50/60 Hz |
| Output Power | 0.75 HP (0.55 kW) |
| Output Current | Approx. 2.8 A |
| Control Method | V/Hz (Volts per Hertz) |
| Enclosure | NEMA 1 / IP20 open chassis |
| Operator Interface | Built-in 3-button keypad + 3-digit LED |
| Mounting | Panel mount with heatsink |
| Communication | Standalone (optional RS-485 on some variants) |
| Protection | Overcurrent, overvoltage, motor overload |
| Status | Discontinued legacy product |
4. Product Introduction
The Reliance 2364-SPM03A is a compact, single-board AC variable frequency drive from the SPM (Small Programmable Motor) family. It provides basic open-loop V/Hz speed control for 0.75 HP induction motors on 200–240 V three-phase power.
Designed for light-duty industrial applications, the drive features a simple onboard keypad and LED display for parameter setup and status indication. Start/stop and speed reference are handled through discrete terminals or a potentiometer. Although the SPM series has long been discontinued, many units remain in service due to their straightforward design and durability. New-surplus or fully tested refurbished units are the typical sources for replacements.
5. Troubleshooting Quick Reference
| Symptom | Possible Cause | Relevance to this Part | Quick Check Method | Recommendation |
|---|---|---|---|---|
| No display / no power | Incoming power missing or open fuse | ❌ Low | Measure 200–240 V AC at input terminals | Verify line power and fuses first |
| Drive trips on overcurrent (OC) | Motor overload, short, or wrong parameters | ✅ High | Check motor current draw and parameter settings | Verify motor nameplate data and reduce acceleration |
| Motor will not start | Enable signal missing or wiring error | ✅ High | Confirm start/stop terminal wiring and logic | Check control wiring and parameter for run command |
| Unstable or no speed control | Speed reference signal problem | ✅ Medium | Measure 0–10 V reference or potentiometer | Verify analog input wiring and scaling |
| Overvoltage trip | Dec bus high or deceleration too fast | ✅ Medium | Check incoming voltage and deceleration time | Lengthen decel time or add braking resistor if needed |
| Drive runs but motor overheats | Incorrect V/Hz curve or overload | ✅ High | Confirm motor parameters and current limit | Match V/Hz pattern to motor and check load |
If the drive still fails after these checks, record the exact fault code shown on the LED display, measure input/output voltages, and contact technical support with photos of the wiring and nameplate.
2364-SPM03A
2364-SPM03A
6. Frequently Asked Questions (FAQ)
Q: Is the 2364-SPM03A still in production?
A: No. It is a discontinued Reliance Electric SPM-series drive. New-surplus and refurbished units are the available sources.
Q: What is the horsepower and voltage rating?
A: 0.75 HP (0.55 kW) on 200–240 V three-phase AC input.
Q: Does it require a PLC to operate?
A: No. It is a standalone drive. Basic start/stop and speed control can be performed with discrete signals and a potentiometer or 0–10 V reference.
Q: What is the control method?
A: Open-loop V/Hz (Volts per Hertz). It is not a vector or closed-loop servo drive.
Q: Can I replace it with a modern Allen-Bradley drive?
A: Yes. Common migration paths include PowerFlex 4 or PowerFlex 525 series drives of equivalent horsepower and voltage. Confirm mounting and wiring differences before substituting.
Q: Does it have communication options?
A: The base unit is standalone. Some SPM variants supported optional RS-485 modules; confirm the exact hardware on your unit.
Q: Why is a surplus unit priced lower than original list?
A: These are genuine legacy drives that are no longer manufactured. Pricing reflects current surplus-market availability and the fact that manufacturer support has ended.
