SDV144-S53/B4S00

The Yokogawa SDV144-S53/B4S00 is a 16-channel digital input module designed to receive no-voltage contact signals from field devices. It provides module-level isolation and operates with a 24 V DC external input supply. This configuration includes an STB4S-00 pressure clamp terminal block without a surge absorber and supports ISA Standard G3 environmental conditions.

Functional Description

The SDV144 receives discrete contact signals from external devices, such as limit switches and relay contacts, and transfers their ON/OFF status to the control system. Its 16 input channels allow multiple field contact states to be monitored through one module.

The input circuit distinguishes contact states by resistance: ON is recognized at 1 kOhm maximum, while OFF is recognized at 100 kOhm minimum. The specified input current is 6 mA +/-20% with a 24 V DC external supply and a 0 Ohm input resistance.

Terminal Block Configuration

The /B4S00 option specifies a pressure clamp terminal block for digital input connections. Its associated terminal block model is STB4S-00, supplied without a surge absorber. This is a single terminal-block configuration, not the dual-redundant STB4D arrangement.

The pressure clamp connection provides the field wiring interface for the module. When checking a replacement, verify the complete suffix and terminal-block option rather than identifying the unit by the SDV144 base model alone.

Input Signal Characteristics

The module accepts no-voltage contact signals rather than treating the input as a general-purpose analog voltage channel. The 24 V DC external supply provides the input circuit operating voltage, while the contact resistance determines the interpreted state.

The maximum input response time is 40 ms. This specification should be considered when checking signal timing requirements for discrete status monitoring and interlock inputs.

Technical Specifications

Parameter	Specification
Model	SDV144
Full Model	SDV144-S53/B4S00
Brand	Yokogawa
Product Type	Digital Input Module
System	ProSafe-RS
Number of Inputs	16 channels
Input Signal	No-voltage contact
ON Input Resistance	1 kOhm maximum
OFF Input Resistance	100 kOhm minimum
Input Current	6 mA +/-20%
Contact Rating	24 V DC +/-5%, 10 mA or greater
External Power Supply	24 V DC +/-5%
External Supply Current Capacity	200 mA
Maximum Instantaneous Input Voltage	30.0 V DC
Input Response Time	40 ms maximum
Isolation	Module isolation
Withstand Voltage	2 kV AC for 1 minute
Current Consumption	290 mA maximum at 5 V DC; 140 mA maximum at 24 V DC
Terminal Block	STB4S-00 pressure clamp terminal
Surge Absorber	Not included
Operating Temperature	-20 to 70 deg C
Environmental Standard	ISA Standard G3
Dimensions	130 x 32.8 x 107.5 mm
Weight	0.36 kg

Specifications are based on Yokogawa General Specifications GS 32Q06K40-31E. The contact rating and external supply tolerance shown above are specific to the S3 style code.

Electrical Isolation and Wiring Considerations

The module provides a specified withstand voltage of 2 kV AC between the input signal circuits and the system for one minute, with the 16 input lines collectively connected. This rating applies under the stated floating field power supply condition. If the field supply is grounded, the system functional ground becomes connected to the field ground, and the same isolation condition does not apply.

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The external 24 V DC supply must meet the specified current capacity of 200 mA. When planning the field wiring, the contact rating, input current and resistance thresholds should be checked against the connected field devices.

Model and Ordering Configuration

The complete ordering number identifies the module type, connection arrangement and environmental specification.

Code	Description
SDV144	16-channel digital input module with module isolation
-S	Standard type
5	Pressure clamp terminal block or MIL cable, without explosion protection
3	ISA Standard G3 environmental specification, -20 to 70 deg C
/B4S00	Pressure clamp terminal block without surge absorber
STB4S-00	Associated terminal block model

The /B4S00 configuration is different from /B4S10, which includes a surge absorber, and /B4D00, which specifies a dual-redundant pressure clamp terminal block. These options should not be treated as interchangeable when ordering replacement hardware.

Frequently Asked Questions

Q: What type of field signals does the SDV144-S53/B4S00 accept?

A: It accepts 16 channels of no-voltage contact signals. The input recognizes ON at 1 kOhm maximum and OFF at 100 kOhm minimum.

Q: Does the SDV144-S53/B4S00 include a surge absorber?

A: No. The /B4S00 option specifies the STB4S-00 pressure clamp terminal block without a surge absorber. The /B4S10 configuration is the corresponding option with a surge absorber.

Q: Is the SDV144-S53/B4S00 suitable for ISA Standard G3 conditions?

A: Yes. Its 3 suffix specifies ISA Standard G3 and an operating temperature range of -20 to 70 deg C. This environmental configuration should be retained when selecting a replacement.

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