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Frequently inquire Together
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InquiryYokogawa SARM15A-000 Relay Contact Input Module
The Yokogawa SARM15A-000, also cataloged as the SARM15A relay contact input module, serves as a 32-point dry contact interface for distributed control systems, supporting dual-line 24 VDC field power supply and rack-mounted installation.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | SARM15A-000 |
| Brand | Yokogawa |
| Origin | Japan |
| Weight | ~2.2 kg |
| Dimensions | 482.6 mm (W) × 132.5 mm (H), 3U rack height |
| Operating Temp | 0 to 50 deg C |
| Operating Humidity | 10% to 90% RH (non-condensing) |
| Power Consumption | 24 VDC, max 0.32 A (internal circuit) |
| Core Function | 32-point dry contact input |
| Input ON State | ≤150 Ω resistance |
| Input OFF State | ≥200 kΩ resistance |
| External Contact Rating | ≥30 VDC, ≥20 mA (min load: 24 VDC, 13 mA) |
| Field Power Supply | Dual-line, 24 VDC, max 0.3 A per line |
| Insulation Resistance | ≥10 MΩ at 500 VDC |
| Withstanding Voltage | 1.5 kVAC field-to-case; 500 VAC power-to-case; 1.5 kVAC power-to-field |
| Termination Hardware | M4 screw terminals |
| Mounting | 19-inch rack mountable |
| Suffix Code – 0 | Always 0 |
| Suffix Code – 0 | Rack mountable |
| Suffix Code – 0 | Basic type |
Channel-to-Channel Isolation
The module provides 1.5 kVAC isolation between field device terminals and case, ensuring safe separation under industrial operating conditions. Dual-line 24 VDC supply supports independent powering of 16-point groups, reducing risk of cross-channel interference. Dry contact detection thresholds (≤150 Ω ON, ≥200 kΩ OFF) ensure deterministic input state recognition.
Frequently Asked Questions
Q: Can the SARM15A-000 detect low-level leakage currents? A: Yes, OFF-state detection requires ≥200 kΩ resistance, preventing false triggering from leakage paths.
Q: How is redundancy achieved in field power supply? A: Dual-line 24 VDC supply allows independent powering of two 16-point groups, supporting redundancy and load distribution.
Q: What is the recommended installation form factor? A: The module is designed for 19-inch rack mounting, occupying 3U height with M4 screw terminals for field wiring.
Field Installation Guidelines
- Mount the module securely in a 19-inch rack using designated hardware.
- Ensure M4 screw terminals are tightened to specified torque to prevent conductor loosening.
- Segregate dry contact wiring from analog loops and high-voltage lines to reduce interference.
- Maintain clearance for airflow and inspection during maintenance.
- Verify insulation resistance before energizing to ensure ≥10 MΩ compliance.
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