Overview
The Honeywell 30731808‑503 Regulator Card is a precision power‑regulation module designed for industrial control systems. It reliably receives raw 24 VDC from a backplane and delivers stable +5 V and +12 V DC outputs to downstream electronics. Moreover, its design includes built-in protections and diagnostic points, which simplify maintenance and help ensure long‑term system stability. Therefore, this card forms a backbone for robust and consistent performance in Honeywell’s legacy or modern automation architectures.
Specification
| Parameter | Specification |
|---|---|
| Part Number | 30731808‑503 |
| Module Type | Voltage Regulator Card for Industrial Control |
| Function | Converts 24 VDC input from backplane to regulated +5 VDC and +12 VDC outputs |
| Input Voltage | 24 VDC nominal (operating range: 22–28 VDC) |
| Output Voltages | +5 VDC ±2%, +12 VDC ±2% |
| Output Current | +5 VDC: up to 3 A, +12 VDC: up to 0.5 A |
| Voltage Regulation | Line Regulation: ±1%; Load Regulation: ±2% |
| Ripple & Noise | <50 mV peak-to-peak (+5 VDC), <100 mV peak-to-peak (+12 VDC) |
| Protection | Overcurrent protection via removable fuses, short-circuit protection, thermal shutdown |
| Diagnostic Features | Test sockets for calibration and fault detection |
| Form Factor | Slide-in module compatible with Honeywell TDC‑2000 and similar chassis |
| Operating Temperature | 0°C to +70°C |
| Storage Temperature | -40°C to +85°C |
| Humidity Range | 5%–95% RH, non-condensing |
| Weight | ~1.05 kg |
| Cooling Method | Natural convection; slot-mounted for chassis airflow |
| Environmental Compliance | RoHS compliant, suitable for industrial ambient conditions |
| Reliability Features | Industrial-grade components, surge suppression, high MTBF for continuous operation |
| Warranty | Typically 12 months from distributor |
| Applications | DCS / PLC backplane voltage regulation, legacy system maintenance, redundant power systems |
FAQ
Q1: What input voltage does the card require?
A1: It requires 24 VDC from the system backplane.
Q2: What regulated outputs does it provide?
A2: The card delivers +5 V DC and +12 V DC to chassis modules.
Q3: Does it have any protection for power faults?
A3: Yes — it includes two removable fuses to guard against overcurrent.
Q4: Can I test for faults on this card?
A4: Yes — built‑in test sockets allow you to detect errors and perform calibration.
Q5: Is it easy to install or replace?
A5: Absolutely. Its slide-in module design lets you install or replace it without complex rewiring.
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