SAI533-H53/A4D00

The Yokogawa SAI533-H53/A4D00 is an 8-channel analog output module that generates 4-20 mA DC signals for field devices. It provides module-level isolation and HART communication for supported field instrument diagnostics and configuration. The /A4D00 option specifies a dual-redundant pressure clamp terminal block, model STA4D-00, for analog signal connections. The module's suffix codes also specify its connection arrangement, environmental classification, and operating temperature range.

Key Functions

• Analog current output: Provides eight 4-20 mA output channels for transmitting control signals to compatible field devices.
• HART communication: Supports digital communication with compatible HART instruments over the analog signal loop, allowing access to supported device information.
• Module isolation: Provides isolation between the module's output circuitry and the system, as specified for this product family.
• Dual-redundant terminal configuration: The /A4D00 option identifies the dual-redundant pressure clamp terminal block. The complete redundant configuration requires an additional module with the same specifications but without the terminal-block option code.

Technical Specifications

Parameter	Specification
Model	SAI533-H53/A4D00
Brand	Yokogawa
Product Type	Analog Output Module (Current Output)
Output Channels	8
Rated Output Range	4-20 mA
Output Range	1.25-23 mA
Allowable Load Resistance	230-600 ohm at rated output range
Rated Accuracy	+/- 48 uA
Data Update Frequency	40 ms
Temperature Drift	+/- 16 uA per 10 deg C
Module Isolation	Yes
HART Communication	Supported
Withstand Voltage	1.5 kV AC between output signal and system for 1 minute
Maximum Current Consumption	320 mA at 5 V DC; 300 mA at 24 V DC
Terminal Block	Dual-redundant pressure clamp terminal block
Terminal Block Model	STA4D-00
Operating Temperature	-20 to 70 deg C
Environmental Classification	ISA Standard G3
Weight	0.26 kg

Specifications are based on Yokogawa's SAI533 module documentation. The listed weight applies to the pressure clamp terminal block or MIL cable configuration; the separately listed signal cable interface adapter configuration weighs approximately 0.33 kg.

Model and Suffix Identification

Code	Specification
SAI533	Analog output module, 4-20 mA, 8 channels, module isolation
-H	HART communication
5	For pressure clamp terminal block or MIL cable, without explosion protection
3	ISA Standard G3 and operating temperature of -20 to 70 deg C
/A4D00	Dual-redundant pressure clamp terminal block for analog signals
STA4D-00	Terminal block model associated with option /A4D00

The 5 suffix identifies a connection arrangement without explosion protection. Do not treat this configuration as suitable for hazardous locations requiring explosion-protected equipment unless the complete installation design and applicable approvals establish suitability.

HART Communication and Redundant Configuration

The HART-enabled SAI533 supports digital communication with compatible field instruments while retaining the 4-20 mA analog output. Yokogawa documents HART-based instrument management through Plant Resource Manager (PRM) in ProSafe-RS, including partial stroke testing for supported valve positioners equipped with the required PST function. Actual availability depends on the connected instrument and system configuration.

The /A4D00 terminal-block option is intended for use in a dual-redundant arrangement. According to Yokogawa's ordering guidance, this arrangement requires an additional SAI533 module with matching specifications but without the /A4D00 option code. The terminal-block option alone does not establish that a complete redundant system is installed or configured.

Frequently Asked Questions

Q: Is the SAI533-H53/A4D00 an analog input or analog output module?

A: It is an analog output module. It provides eight isolated 4-20 mA current output channels; it is not an analog input module.

Q: Does the SAI533-H53/A4D00 support HART communication?

A: Yes. The -H suffix identifies the HART communication function. HART device management and functions such as partial stroke testing require compatible field instruments and the appropriate ProSafe-RS and PRM configuration.

Q: Can the SAI533-H53/A4D00 be used in a dual-redundant configuration?

A: Yes. The /A4D00 option identifies the dual-redundant pressure clamp terminal block. Yokogawa specifies an additional module with matching specifications but without the terminal-block option code for the redundant arrangement.

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