Honeywell 621-0022-RC Isolated Analog Input Module
Honeywell 621-0022-RC Isolated Analog Input Module
The Honeywell 621-0022-RC, also cataloged as the 621-0022-RC isolated analog input module, serves as a rack-mounted PCB card for differential signal acquisition across Honeywell IPC 620 and ISSC 600 PLC platforms.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 621-0022-RC |
| Brand | Honeywell |
| Origin | IPC 620 / ISSC 600 PLC systems |
| Weight | 1.46 lbs (approx. 0.66–0.8 kg) |
| Dimensions | 4.5" × 1.5" × 10.0" (11.4 cm × 3.8 cm × 25.4 cm) |
| Operating Temp | -40 deg C to +70 deg C |
| Power Consumption | 200 mA at 5 VDC |
| Module Type | Isolated Analog Input Module |
| Channel Count | 8 isolated differential channels |
| Standard Input Range | 0–10 VDC (configurable ±10 V, 1–5 V, 0–5 V, 0–20 mA, 4–20 mA) |
| Input Impedance | 50 kΩ |
| Accuracy | ±0.5% of reading (±0.1% FS on calibration) |
| Resolution | 12-bit resolution |
| Conversion Time | ~50 µs per channel |
| Channel Isolation | 500 VDC channel-to-channel |
Channel-to-Channel Isolation
The module provides 500 VDC isolation between channels, preventing electrical noise propagation and ground loop interference. This isolation ensures deterministic acquisition of analog signals across multiple input ranges, maintaining integrity in distributed PLC environments.
Frequently Asked Questions
Q: Can the 621-0022-RC handle mixed signal ranges simultaneously? A: Yes, channels can be configured independently for voltage or current ranges, but each channel operates in one mode at a time.
Q: What is the conversion latency per channel? A: Approximately 50 µs per channel, based on 12-bit resolution ADC conversion.
Q: Is hot-swap supported for this module? A: No, insertion or removal under power is not recommended due to backplane current stability requirements.
Field Installation Guidelines
- Install module into IPC 620 rack slots; ensure full connector engagement.
- Maintain grounding continuity for shielding layers to minimize EMI.
- Route analog input wiring separately from high-voltage conductors to reduce cross-talk.
- Verify isolation integrity during commissioning; perform channel-to-channel validation.
- Observe environmental limits of -40 deg C to +70 deg C and humidity control to prevent condensation.
Honeywell 621-0022-RC Isolated Analog Input Module
