SAI533-H03/A4S00

The Yokogawa SAI533-H03/A4S00 is an 8-channel analog output module for 4 to 20 mA current signals. It provides module-isolated outputs for transmitting analog control signals to field devices. The HART communication option supports communication over the analog output loop, while the /A4S00 configuration specifies a pressure clamp terminal block for external signal connections.

Output Configuration and Signal Characteristics

The SAI533-H supports eight current output channels with a rated range of 4 to 20 mA. Its specified output range extends from 1.25 to 23 mA, allowing operation beyond the nominal signal range. The maximum range over which guaranteed precision is specified is also 1.25 to 23 mA.

The allowable load resistance is 230 to 600 ohms within the rated output range. This resistance requirement should be checked against the total loop resistance, including field wiring and connected instrument inputs, when selecting the output circuit.

HART Communication

The -H suffix identifies the HART communication version. HART communication allows compatible field instruments to exchange digital information over the same wiring used for the 4 to 20 mA analog signal. Compatibility with the field instrument and the complete loop configuration should be verified before commissioning.

Isolation and System Interface

The module provides isolation between output channels and the system as specified for this model. Its signal-to-system withstand voltage is 1.5 kV AC for one minute. This specification describes an electrical withstand test, rather than a continuous operating voltage rating.

The module has separate 5 V and 24 V system current consumption ratings. These values are relevant when checking the available capacity of the system power supply.

Technical Specifications

Parameter	Specification
Model	SAI533-H03/A4S00
Brand	Yokogawa
Product Type	Analog Output Module
Number of Output Channels	8 channels, module isolation
Rated Output Range	4 to 20 mA
Output Range	1.25 to 23 mA
Maximum Range of Guaranteed Precision	1.25 to 23 mA
Allowable Load Resistance	230 to 600 ohms at rated output range
Accuracy	+/-48 uA
Data Update Frequency	40 ms
Temperature Drift	+/-16 uA/10 deg C
Withstand Voltage	1.5 kV AC between output signal and system for 1 minute
Maximum Current Consumption	5 V system: 320 mA; 24 V system: 300 mA
External Connection	Pressure clamp terminal block
Terminal Block Model	STA4S-00
HART Communication	Supported
ISA Standard	G3
Operating Temperature	-20 to 70 deg C
Weight	0.26 kg

Terminal Connection and Ordering Configuration

The /A4S00 option specifies the STA4S-00 analog pressure clamp terminal block. This provides the field wiring connection for the module's eight current output channels.

The selected configuration is relevant when checking replacement requirements. A module supplied with a signal cable interface adapter uses a different connection arrangement and has a different specified weight.

Partial Stroke Test Support

The SAI533 supports Partial Stroke Test (PST) through its HART communication capability. With a compatible HART valve positioner equipped with a PST function, the ProSafe-RS Plant Resource Manager (PRM) client can initiate the test. This function depends on the connected positioner and the applicable system configuration; it is not a standalone mechanical test function of the output module.

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Frequently Asked Questions

Q: Does the SAI533-H03/A4S00 support HART communication?

A: Yes. The -H designation identifies the HART communication version. It supports digital communication with compatible field instruments while maintaining the 4 to 20 mA analog output.

Q: Which terminal block is specified for this model?

A: The /A4S00 option specifies the STA4S-00 pressure clamp terminal block for analog signals. It should be checked when matching the module to an existing field wiring arrangement.

Q: Can this module support Partial Stroke Testing?

A: Yes. PST is supported through HART communication with compatible valve positioners that have a PST function. The PRM client can conduct the test through the ProSafe-RS system.

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