Key Technical Specifications
| Parameter | Value |
|---|---|
| Input Signal | 4-20mA (Programmable) |
| Output Signal | 4-20mA (Programmable) |
| Power Supply | 10-42 VDC |
| Configuration | PC Software (SIY Config Tool) |
| Isolation | Input/Output/Power (3-Way) |
| Accuracy | ±0.1% of Span (Typical) |
| Response Time | <10ms (Programmable Filter) |
| Mounting | DIN Rail (35mm) |
| Operating Temp | -40°C to +85°C |
| EMC Compliance | IEC 61000-4 Series |
Product Introduction
Moore SIY/PRG/4-20MA/10-42DC provides three-way galvanic isolation for 4-20mA process signals while accepting a wide 10-42VDC power range. This unit breaks ground loops and conditions signals for DCS/PLC inputs without requiring external power supplies.Field technicians value the “PRG” flexibility; one SKU replaces dozens of fixed-range isolators. Just remember to download the configuration file before swapping a failed unit, as the new device ships in factory-default 4-20mA pass-through mode.
Installation & Configuration Guide
Preparation (10 min)
- Download Moore SIY Configuration Software (latest version).
- Verify 10-42VDC power source is clean (ripple <5%).
- Prepare USB-to-RS485 config cable (if not using front-port).
Removal (5–10 min)
- De-energize 10-42VDC supply first.
- Disconnect signal wires; label immediately.
- Release DIN rail clip; slide unit up.
Installation (10 min)
- Snap SIY/PRG onto 35mm DIN rail; ensure positive lock.
- Terminate signal wires to specified torque (0.4-0.5 Nm).
- Connect config cable if programming on-site.
Power-On & Test (10 min)
- Apply 10-42VDC; verify green PWR LED illuminates.
- Launch config software; read device parameters.
- Inject 4mA, 12mA, 20mA; verify output within ±0.1%.
- (If the LED blinks red, check for reversed polarity — I’ve seen this fry the input protection diode in seconds.)
Troubleshooting Quick Reference
| Symptom | Probable Cause | Corrective Action |
|---|---|---|
| No Output | Power <10VDC | Measure supply under load; check wiring. |
| Output Stuck High | Open Loop Detection | Verify sensor wiring; disable open-loop detect in SW. |
| Erratic Output | Ground Loop | Confirm 3-way isolation; check shield termination. |
| Config Fail | Wrong COM Port | Verify RS485 address; try different USB cable. |
| Over-Temp LED | Ambient >85°C | Improve cabinet ventilation; add fan. |
Dimensions, Mounting & Wiring Notes
- Form Factor: Slim DIN module, approx. 12.5mm × 90mm × 58mm.
- Mounting: Standard 35mm DIN rail; no tools required for snap-on.
- Wiring: Use 18-24 AWG stranded wire; ferrules recommended.
- Terminal Note: Do not over-torque; strip length 7-8mm max to prevent shorting.
- Spacing: Maintain 10mm clearance between units for heat dissipation.
FAQ
Can I configure this without a PC?
No. The “PRG” suffix means PC-only configuration. There are no DIP switches or pushbuttons on the SIY/PRG/4-20MA/10-42DC.I lost the config file; can I clone from a working unit?
Yes. Use the “Read Device” function in SIY Config Tool, save as .siy file, then “Write Device” to the replacement. Always keep a backup folder by loop number.Is 10-42VDC really wide enough for 24V nominal systems?
Yes. The internal switch-mode supply handles 10-42VDC without derating. I’ve run these on 18V battery backups during outages with zero signal dropout.What’s the difference between SIY and SIX series?
SIX is fixed-range (non-programmable). SIY/PRG offers full software configurability but requires the config tool for any parameter change.Does this support HART passthrough?
No. For HART, use HIM or HIX series. The SIY/PRG/4-20MA/10-42DC is analog-only; HART signals will be filtered out.Why does my unit get warm at 42VDC?
Normal. Linear regulation at high input voltage dissipates heat. If >60°C, reduce input voltage or improve airflow.Can I return it if software won’t connect?
Returns accepted if unit passes bench test. 90% of “connection failures” are bad USB-RS485 adapters; try a known-good cable first.
