Digital guide
You are here:
YOKOGAWA PSCDM024DCBAN
Product Introduction:
The PSCDM024DCBAN is a 24 V DC loop-powered power supply module from Yokogawa’s PSCDM series, designed specifically to provide regulated 24 V DC power to 2-wire transmitters in the FLXA product family. It converts AC mains power to a stable DC output suitable for powering field instruments in hazardous and non-hazardous areas.
Detailed content
Measurement Principle:
The unit accepts 100–240 V AC mains input, rectifies and filters the AC through an internal switching power supply, and delivers a regulated 24 V DC output to the 2-wire transmitter loop. The current drawn by the transmitter (4–20 mA) flows through the same pair of wires that carry the signal, enabling loop-powered (2-wire) operation.
Technical Specifications:
| Parameter | Specification |
|---|---|
| Model | PSCDM024DCBAN |
| Output Voltage | 24 V DC (regulated) |
| Output Current | Up to 40 mA (max loop drive capability) |
| Input Voltage | 100–240 V AC, 50/60 Hz (universal) |
| Input Power Consumption | ≤ 10 VA (typical) |
| Output Ripple | ≤ 50 mV p-p |
| Voltage Regulation | ±1% (line and load) |
| Efficiency | ≥ 75% |
| Operating Temperature | -20°C to +60°C (-4°F to +140°F) |
| Protection Class | NEMA 4X / IP66 |
| Mounting | DIN Rail (35 mm) or Panel Mount |
| Hazardous Area Approval | ATEX Zone 2, IECEx, FM Class I Div 2 |
| Approvals | CE, UL, CSA, TÜV |
Structural Features:
- DIN rail or panel-mount enclosure
- Screw-terminal connections for AC input and DC output
- LED power indicator (green = normal operation)
- Compact single-channel design
- Universal AC input — no range selection required
Performance Parameters:
| Parameter | Value |
|---|---|
| Short Circuit Protection | Yes — automatic recovery |
| Overload Protection | Yes — current limiting at 45 mA |
| Overvoltage Protection | Yes — crowbar circuit |
| Thermal Protection | Yes — auto shutdown at +80°C |
| Isolation | 1500 V AC (input to output) |
| MTBF | ≥ 100,000 hours (at 25°C) |
| Warm-up Time | < 2 seconds |
Key Advantages:
- Universal AC input (100–240 V) — no regional configuration needed
- Designed specifically for 2-wire FLXA transmitters — guaranteed loop drive compatibility
- High efficiency switching power supply — minimal heat generation
- Comprehensive protection — short circuit, overload, overvoltage, thermal
- Hazardous area certified for Zone 2 / Div 2 installations
- Compact form factor — saves panel space
Applicable Industries:
- Oil and Gas (Hazardous Areas)
- Chemical Processing
- Refineries and Petrochemical Plants
- Water and Wastewater
- Pharmaceutical Manufacturing
- Mining Operations
Installation Requirements:
- Mount on 35 mm DIN rail or panel with adequate ventilation
- Connect AC mains to L/N terminals — observe correct polarity
- Connect DC output (+) to transmitter positive, (−) to transmitter negative
- Ensure the total loop resistance (wire + transmitter) does not exceed 750 Ω
- Verify grounding of the DIN rail and enclosure per local electrical codes
- Maintain minimum 10 mm clearance for heat dissipation
Usage Precautions:
- Do not connect DC output to AC mains — this will destroy the unit instantly
- Do not exceed 40 mA total loop current
- Verify output voltage is 24 V DC before connecting transmitter
- Do not operate in temperatures above +60°C
- Ensure proper fuse protection on the AC input side per local regulations
- Do not disassemble — no user-serviceable parts inside
