ASD533-S00/SD3S0

The Yokogawa ASD533-S00/SD3S0 is an 8-channel isolated digital output module with a built-in barrier. It provides discrete output signals for field-side interfaces, with an output response time of 10 ms and status output functionality. The specified /SD3S0 ordering option identifies a pressure-clamp terminal block configuration for digital output, model ATSD3S-0.

Functional Description

The ASD533 is designed for digital output applications requiring electrical isolation between the control system and field-side circuits. Its built-in barrier provides an isolated interface for connecting field devices under the specified electrical and intrinsic-safety conditions.

The module provides eight isolated output channels. Its output characteristics are specified as 12 V at 40 mA and 26 V at 0 mA, describing the output voltage under the corresponding load conditions rather than a fixed 24 V output rating.

Output Characteristics

The module provides a 10 ms output response time and a status output function. The specified withstand voltage is 1500 V AC. These characteristics are relevant when checking field-device requirements, output response expectations and electrical isolation conditions.

The manufacturer's documentation also specifies a maximum current consumption of 150 mA from 5 V DC and 500 mA from 24 V DC.

Technical Specifications

Parameter	Specification
Model	ASD533-S00/SD3S0
Brand	Yokogawa
Product Type	Digital Output Module with Built-In Barrier
Base Model	ASD533
Number of Output Channels	8, isolated
Output Signal	12 V at 40 mA; 26 V at 0 mA
Output Response Time	10 ms
Function	Status output
Withstand Voltage	1500 V AC
Maximum Current Consumption	150 mA (5 V DC); 500 mA (24 V DC)
Barrier Type	Isolated interface
External Connection	Pressure-clamp terminal block
Terminal Block Model	ATSD3S-0
Operating Temperature	-20 to 70 deg C
Weight	0.3 kg

Ordering Configuration

The complete ordering designation contains the module model, suffix codes and terminal block option:

Code	Description
ASD533	Digital Output Module with Built-In Barrier, 8-channel, isolated
-S	Standard type
0	Always 0
0	Always 0
/SD3S0	Pressure-clamp terminal block for digital output, ATSD3S-0

The /SD3S0 option identifies the single pressure-clamp terminal block configuration. Yokogawa also lists /SD3D0 for the dual-redundant pressure-clamp terminal block ATSD3D-0. These are distinct terminal connection configurations and should not be treated as interchangeable ordering codes without checking the installed hardware.

Field Application Considerations

The built-in barrier is intended for field interfaces requiring electrical isolation. When checking an existing installation or planning a replacement, verify the terminal block configuration and the electrical requirements of the connected field devices.

Yokogawa specifies that when short circuits occur in two or more field channels, all channels of the module fail to maintain intrinsic-safety protection. This limitation should be considered when reviewing field wiring and fault conditions.

Frequently Asked Questions

Q: How many digital output channels does the ASD533-S00 provide?

A: It provides eight isolated digital output channels. The specified output characteristics are 12 V at 40 mA and 26 V at zero output current.

Q: What does /SD3S0 mean in the complete model number?

A: It identifies the pressure-clamp terminal block option ATSD3S-0. The corresponding dual-redundant terminal block option is /SD3D0, associated with ATSD3D-0.

Q: What should be checked when replacing an existing ASD533 module?

A: Verify the complete ASD533 model designation, terminal block type, field wiring and connected load requirements. Also check the applicable intrinsic-safety conditions before returning the module to service.

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