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Yokogawa SAI143-H53/STA4D-00 Analog Input module (Current input)

Brand: Yokogawa
Product Family: ProSafe-RS systems
Model Number: SAI143-H53/STA4D-00
Type: Analog Input module (Current input)
Product Origin: Japan
Payment: T/T, Western Union, Credit Card
Price: USD 120
Dimensions:
Weight:
Warranty: 12 months

  • Product Details
  • Technical Documentation

Overview

The SAI143-H53/STA4D-00 is a current input module designed for ProSafe-RS systems, supporting HART communication. It features 16 isolated channels for 4 to 20 mA input signals and supports dual redundancy. Each channel includes a built-in power supply function for HART devices.

Standard Specifications

Current Input Module

This module receives 4 to 20 mA signals from the field and can be used in a dual-redundant configuration.

ItemSpecifications
ModelSAI143 (*1)
Number of Input Channels16 channels, module isolation (*5)
Rated Input Range4 to 20 mA
Permissible Input Range0 to 25 mA
Input Impedance (Power-ON)250 Ω + Current value
Input Impedance (Power-OFF)500 kΩ minimum
Rated AccuracySAI143-H: ±16 µA (0.05 to 23 mA) (*3) (*4)
Data Update Frequency40 ms
Temperature Drift±16 µA/10 °C
Transmitter Power Supply16.15 V min (at 20 mA), 26.4 V max (at 0 mA), 25 mA current limit
Withstand Voltage1.5 kV AC between input signal and system (*2)
Max. Current Consumption5V: 320 mA, 24V: 550 mA
Weight0.34 kg (Clamp terminal or MIL cable), 0.39 kg (Signal cable adapter)
External ConnectionPressure clamp terminal, MIL cable, Dedicated signal cable
Transmitter Power ON/OFFAvailable (2-wire setting, all channels simultaneously) (*7)
PRM SupportAvailable (SAI143-H)

Notes:
(*1) No Zener barriers allowed; use isolation barriers in intrinsic safety systems.
(*2) 500V AC when using dedicated signal cable.
(*3) ±32 µA (for input range under 0.05 mA, Style Code S3 or later).
(*4) Accuracy for Style Code S3 or later: ±16 µA (0.05–23 mA), for S2 or earlier: ±16 µA (1–23 mA).
(*5) When operating above 60°C, channel availability may be restricted. See “ProSafe-RS Outline of I/O Modules.”
(*6) Max voltage drop in input protection: 0.45V, input impedance varies from 272.5 Ω (20 mA) to 362.5 Ω (4 mA).
(*7) Function resets alarm states in Fire & Gas devices by turning off transmitter power in 2-wire settings. (Supported in R4.03.00 and Style Code S4 or later.)


HART Communication Specifications

The SAI143-H53/STA4D-00 supports HART 5.7 protocol, allowing communication with HART 5, 6, and 7 devices. However, only one HART device can be actively communicated with at a time due to a single HART modem.

FunctionDescription
Communication ModeSerial half-duplex, start-stop synchronization (1 start bit / 8 data bits / odd parity / 1 stop bit)
Applicable StandardHART Protocol Revision 5.7 (*1)
Transmission Speed1200 ±2 bps
ModulationBinary phase-continuous FSK (1 = 1200 Hz ±1%, 0 = 2200 Hz ±1%)
Frame Length5 to 267 bytes
Error DetectionLongitudinal/vertical parity
Response TimeMax. 28 characters (256.7 ms)
No Response Timer33 characters (305 ms) for primary, 41 characters (380 ms) for secondary
Bus Monitor8 characters (75 ms)
Response Window20 ms

Model and Suffix Codes

Model: SAI143-H53/STA4D-00

Description: Analog Input Module (4 to 20 mA, 16 channels, module isolation)

Suffix Codes

  • -H: With HART communication [Release: R1.02.00] (*1)
    (1: For dual-redundant pressure clamp terminal block, do not use STA4D-0 S1.)
  • 5: For pressure clamp terminal block or MIL cable with no explosion protection
  • 3: With ISA Standard G3 and temperature range (-20 to 70 ºC)

Option Codes

  • /A4D00: *With dual-redundant pressure clamp terminal block for analog (3) [Model: STA4D-00](3: For dual-redundant configuration, order an additional module with the same specifications but without option codes.)

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