SDV144-S13/B4D00

The Yokogawa SDV144-S13/B4D00 is a 16-channel digital input module designed to acquire isolated dry-contact signals in a Yokogawa control system. It accepts 24 VDC contact input circuits and transfers discrete ON/OFF status information to the system. This configuration includes a dual-redundant pressure clamp terminal block without surge absorbers, providing a defined field wiring arrangement for digital signal acquisition.

Digital Input Function

The SDV144 receives signals from external voltage-free contacts and converts their electrical states into digital input information for system processing. Its 16-channel architecture allows multiple field contact signals to be monitored through one module.

The module uses module-level isolation between the input circuits and the system side. This isolation separates field input signals from the system electronics and is specified with a 2 kV AC withstand voltage for one minute.

Input Signal Characteristics

The input circuit is designed for 24 VDC external contact distribution. The specified input current is 6 mA +/-20% at 24 VDC, while the ON and OFF resistance thresholds define the electrical conditions used to distinguish contact states.

The maximum instantaneous permissible input voltage is 30 VDC. The specified maximum response time is 40 ms, which should be considered when evaluating digital event acquisition and application response requirements.

Terminal Block Configuration

The /B4D00 option identifies a dual-redundant pressure clamp terminal block without surge absorbers, designated STB4D-00. This is a terminal connection configuration; it does not, by itself, establish that one SDV144 module provides complete system-level I/O redundancy.

For a dual-redundant module arrangement, Yokogawa's ordering instructions specify an additional module with the same specification but without the terminal block option code. The complete module and terminal block arrangement should therefore be checked against the intended redundancy configuration.

Technical Specifications

Parameter	Specification
Model	SDV144-S13/B4D00
Brand	Yokogawa
Product Type	Digital Input Module
Base Model	SDV144
Input Channels	16
Input Signal Type	No-voltage contact (dry contact)
Input Voltage	24 VDC
Contact Rating	24 VDC, 10 mA or greater
Input Current	6 mA +/-20%
ON Resistance	1 kOhm maximum
OFF Resistance	100 kOhm minimum
External Power Supply	24 VDC
External Supply Tolerance	+/-5% for SDV144 style codes S1, S2 and S3
External Supply Current Capacity	200 mA
Maximum Input Voltage	30 VDC instantaneous
Input Response Time	40 ms maximum
Isolation Withstand Voltage	2 kV AC for 1 minute
Current Consumption	290 mA maximum at 5 VDC; 140 mA maximum at 24 VDC
Terminal Block	Dual-redundant pressure clamp terminal block
Surge Absorber	Not included
Terminal Block Model	STB4D-00
Weight	0.36 kg

Input Wiring and Electrical Considerations

The external 24 VDC supply provides the contact input circuit voltage. The specified 200 mA current capacity should be considered when sizing the field supply. The 6 mA input current and resistance thresholds are relevant when checking contact suitability and field wiring conditions.

The 2 kV AC isolation rating applies between the input signals and the system under the manufacturer's specified test conditions. Yokogawa notes that the field power supply grounding arrangement affects this isolation. A floating field supply is recommended for higher noise immunity.

Model Configuration

The complete ordering designation identifies the SDV144 digital input hardware and its associated terminal configuration. The /B4D00 option specifies the STB4D-00 dual-redundant pressure clamp terminal block without surge absorbers.

The -S13 designation is associated with the SDV144 style configuration. The manufacturer's documentation identifies the S3 temperature and ISA Standard G3 option as supporting an operating temperature range of -20 to 70 deg C. The style code and terminal block option should be checked together when matching replacement hardware.

Frequently Asked Questions

Q: What type of field signals can the SDV144-S13/B4D00 receive?

A: It receives 16 isolated no-voltage contact signals. The specified contact input circuit operates with a 24 VDC external supply.

Q: Does the /B4D00 option include surge protection?

A: No. It specifies the dual-redundant pressure clamp terminal block STB4D-00 without surge absorbers. The /B4D10 option is the corresponding terminal block configuration with surge absorbers.

Q: Does the /B4D00 designation mean the module itself is redundant?

A: No. It identifies the dual-redundant terminal block configuration. For a dual-redundant module arrangement, Yokogawa specifies an additional SDV144 module with matching specifications but without the terminal block option code. 

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