Description

YOKOGAWA SDV144-S13

1. Basic Information

Model: SDV144-S13

Manufacturer: YOKOGAWA

Type: 16-channel Isolated Digital Input Module (DI)

Compatible Systems: CENTUM VP / VX DCS, ProSafe-RS SIS

Function: Acquire field dry contact / voltage-free switch signals (limit switches, pressure switches, temperature switches, etc.) and convert them into internal digital signals for control logic and interlock applications.

2. Core Technical Specifications

1) Channels & Signals

Channels: 16 independent inputs with module-level isolation

Input Type: Voltage-free dry contact

ON state: ≤1 kΩ

OFF state: ≥100 kΩ

Input Current: 6 mA ±20% (24 V DC external power supply)

Response Time: ≤40 ms

2) Electrical Parameters

External Power Supply: 24 V DC ±20%, Capacity ≥200 mA

Backplane Power Consumption: 5 V DC ≤290 mA; 24 V DC ≤140 mA

Withstand Voltage: 2 kV AC for 1 minute (between input and system circuit)

Maximum Transient Withstand Voltage: 30 V DC

3) Environmental & Physical Parameters

Operating Temperature: -20℃ ~ +60℃

Storage Temperature: -40℃ ~ +85℃

Humidity: 5%–95% RH (Non-condensing)

Protection Class: IP20 (Front Panel)

Dimensions (W×H×D): Approx. 25 × 127 × 102 mm

Weight: Approx. 0.36 kg

3. Main Features

High-density 16-channel acquisition: 16 digital input channels integrated in one module to save cabinet space and I/O slots.

Universal dry contact compatibility: Directly connect to passive switches without additional relays, suitable for most field switch devices.

Electrical isolation and anti-interference: Module-level isolation suppresses ground loop and EMI, ensuring stable signals and low malfunction rate.

Fast response & diagnosis: Millisecond-level acquisition; supports wire break and fault diagnosis for easy maintenance.

Redundancy support: Can be configured as redundant I/O in pairs for safety interlock and ESD circuits.

4. Typical Applications

Petrochemical Industry: Acquisition of interlock switches, valve positions and pump/motor status.

Power Industry: Monitoring of auxiliary equipment status, limit switches and safety switches for boilers and turbines.

Metallurgical Industry: Collection of limit signals and fault contacts for blast furnaces and rolling mill equipment.

Water Treatment: Monitoring of pumps, valves, level switches and equipment operating status.

5. Notes

This module is only compatible with CENTUM VP/VX and ProSafe-RS systems. It cannot be used with other series of PLC/DCS, and mismatched devices will fail to be recognized and communicate.

Use 24 V DC ±20% external power supply strictly. Reversed polarity will damage the input circuit.

Install or remove the module only when power is cut off. Hot swapping may cause backplane bus failure, module burnout or false interlock actions.

Use shielded twisted pair cables for wiring, and keep cables away from power cables and inverters to prevent signal fluctuation caused by electromagnetic interference.

Do not connect high voltage or active signals to dry contacts, otherwise permanent damage to channels will occur.

For redundant configuration, use modules with the same model and firmware version. Version mismatch will lead to synchronization errors and interlock disturbance.

Keep the operating temperature within -20℃ ~ +60℃. Long-term over-temperature operation will accelerate component aging and reduce isolation withstand voltage and reliability.

Clean gold fingers and terminals regularly. Dust and oxidation will cause poor contact and intermittent signal loss.