Yokogawa SDV144-S33 Digital Input Module

Technical Specifications

Model:SDV144-S33

Brand:Yokogawa

Input channels:16 isolated digital input

Input signal:No-voltage dry contact

On resistance:≤1kΩ;Off resistance:≥100kΩ

Input current:6mA ±20% @24V DC,0Ω input

Contact rating:24V DC ±10%,≥10mA

External power:24V DC,20.4~26.4V DC

Max instantaneous input voltage:30V DC

Response time:≤40ms

Withstand voltage:2kV AC(1min) between field input and system circuit

Power consumption:Max 290mA@5V DC,max140mA@24V DC

Redundancy:Support dual redundant configuration

Operating temperature:-20~+70℃,ISA G3 environmental grade

Relative humidity:5~95% non-condensing

Weight:0.36kg(terminal type),0.41kg(with signal cable adapter)

Certification:CE,UL

System compatibility

Designed for Yokogawa ProSafe-RS safety instrumented system(SIS),installed in safety node unit,cooperates with safety controller SCP401/SCP461,widely used in ESD emergency shutdown,fire & gas detection systems of petrochemical,power,chemical refining plants.

Function

SDV144-S33 is safety digital input module for ProSafe-RS.It collects on/off status signal from field dry contact devices such as limit switches,pressure switches,fire detectors and emergency stop buttons.Module isolation design separates field circuit and safety control circuit.Supports dual redundant setup to guarantee signal acquisition continuity.Each channel carries continuous self-diagnosis to detect circuit fault.Configure safety logic and channel parameters via ProSafe-RS engineering software.

Installation

Install on safety node unit backplane slot,connect field dry contact wiring via pressure clamp terminal or MIL dedicated AKB331 signal cable,set channel diagnosis parameters by ProSafe-RS engineering software.Hot swap supported under redundant configuration.

Interface

‑Field dry contact terminal / MIL cable connector

‑Internal ESB bus backplane connector

‑LED indicators for run,channel status and fault

Circuit feature

Module-wide galvanic isolation,anti-electromagnetic interference,per-channel self-diagnosis,short circuit detection,fast response for safety interlock.

Feature

SDV144-S33 belongs to Yokogawa ProSafe-RS safety I/O series digital input module.Suffix -S33 is standard ISA G3 version.Common faults:terminal poor contact,signal cable interference,channel circuit damage.Confirm firmware version before replacement.

Diagnostic

Open circuit,short circuit,channel fault or module hardware fault triggers alarm and upload diagnostic information to safety station.

Built‑in function

Collect discrete dry contact status for safety interlock and emergency shutdown system,used for SIS safety spare replacement.

Product Brief

SDV144-S33 is Yokogawa ProSafe-RS 16 channel isolated dry contact digital input module,ISA G3 grade,≤40ms response time.Check safety node unit and SIS firmware compatibility before ordering.ESD anti-static protection required during installation.