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IS420YDIAS1B

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General Electric IS420YDIAS1B is a Mark VIeS safety discrete contact input I/O pack that processes 24 field contacts with 1 ms sequence-of-events reporting.
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Technical specifications for IS420YDIAS1B

  • Manufacturer:
    General Electric
  • Part Number:
    IS420YDIAS1B
  • Product Family:
    GE Mark VIe Distributed I/O
  • Product Type:
    Mark VIeS Discrete Contact Input I/O Pack
  • Stock:
    1
  • Simplex Terminal Boards:
    STCI S2A and S4A
  • Redundant Terminal Boards:
    TBCI S2C and S3C
  • Functional Acronym:
    YDIA
  • Input Quantity:
    24 discrete contact inputs
  • Sequence of Events:
    1 ms resolution
  • Ethernet Ports:
    Two RJ45 connectors
  • Field Connector:
    DC-37 terminal-board connector
  • Control Power:
    24/28 VDC
  • Maximum Power:
    6.8 W per I/O pack
  • Operating Temperature:
    -40 to +70 °C
  • Storage Temperature:
    -40 to +85 °C
  • Safety Standard:
    IEC 61508
  • Tariff Code:
    8537101190
  • Country of origin:
    USA
  • Place of shipment:
    Xiamen,Fujian,China
By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.

More Information

Overview Manuals Board Options Input Processing Fault Isolation Safety & Limits

Features:

  • IS420YDIAS1B processes 24 discrete contact inputs for the Mark VIeS safety architecture.
  • Input changes are recorded with 1 ms sequence-of-events resolution.
  • Two RJ45 ports, a three-pin power connector, and a DC-37 field connector form the pack interface.
IS420YDIAS1B uses STCI S2A and S4A terminal boards for simplex installations.

TBCI S2C and S3C terminal boards let IS420YDIAS1B support simplex, dual, or TMR arrangements.

All IS420YDIAS1B packs connected to one T-type board must use the same S1 hardware form.

The General Electric IS420YDIAS1B Mark VIeS Discrete Contact Input I/O Pack may be available for purchase and technical support from Apter Power.
General Electric IS420YDIAS1B Mark VIeS Discrete Contact Input I/O Pack Manuals,Datasheets,Link Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.

Compatible Terminal-Board Options

  • STCI S2A/S4A: STCI variants are assigned to single-pack installations.
  • TBCI S2C/S3C: TBCI variants permit one-, two-, or three-pack redundancy layouts.
  • Field connector: Terminal-board signals enter the pack through its DC-37 interface.
  • Form matching: Every pack fitted to one T-type board must use the same S1 hardware form.

Discrete Contact Input Processing

  • Input scan: Field contact states enter the safety controller through 24 acquisition paths.
  • Event timing: State changes are available with 1 ms sequence-of-events resolution.
  • Network transfer: Two RJ45 ports connect the processed input data to IONet.
  • Status display: Front indicators show power, attention, network, and channel conditions.

Input and Hardware Diagnostics

  • Startup tests: Power-up checks verify pack hardware before normal acquisition.
  • Wetting monitor: Loss of field wetting voltage produces a diagnostic.
  • Input response: Background tests identify channels that do not respond as expected.
  • Board identity: The controller rejects a terminal-board identity that does not match the configured I/O hardware.

Safety Configuration and Environment

  • Safety platform: The pack belongs to the IEC 61508 Mark VIeS architecture.
  • Control power: Each pack operates from 24/28 V dc and consumes up to 6.8 W.
  • Operating range: Normal acquisition is supported across -40 to +70 °C.
  • Storage range: Unpowered storage is permitted from -40 to +85 °C.
Description
General Electric IS420YDIAS1B is a Mark VIeS safety discrete contact input I/O pack. It acquires 24 field contact states through a compatible terminal board and transfers the processed values, alarms, and sequence-of-events records to the safety control network.

The hardware interface on IS420YDIAS1B includes two RJ45 Ethernet ports, a three-pin control-power connector, and a DC-37 connector for the terminal board. The pack operates from 24/28 V dc control power and draws no more than 6.8 W, while front-panel indicators report power, attention, Ethernet, and input status.

Each channel handled by IS420YDIAS1B supports 1 ms sequence-of-events timing. Power-up self-tests, wetting-voltage monitoring, background checks for nonresponding inputs, and terminal-board identity verification distinguish field-circuit problems from pack, network, or configuration faults.

Terminal-board selection is part of the configuration boundary for IS420YDIAS1B. STCI S2A and S4A assemblies support simplex operation, while TBCI S2C and S3C assemblies support simplex, dual, or TMR arrangements; S1A and S1B YDIA hardware forms must not be mixed on the same T-type terminal board.
Alternative Names
IS420YDIAS1-B IS420YDIA-S1B IS420 YDIA S1B IS42OYDIAS1B IS420YDIASIB IS420YDIAS-1B IS420-YDIA-S1B IS420YDIAS18
Technical notes
General Electric IS420YDIAS1B supports STCI S2A/S4A terminal boards for simplex use and TBCI S2C/S3C boards for simplex, dual, or TMR arrangements.
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FAQS

The following is a list of questions commonly asked by our customers. Please contact us if you have a question about our process that is not answered below.
How is the terminal board selected for an IS420YDIAS1B redundancy layout?
Pair IS420YDIAS1B with STCI S2A or S4A for simplex service, or use TBCI S2C or S3C for simplex, dual, or TMR arrangements.
Why must S1A and S1B YDIA packs not be mixed around IS420YDIAS1B?
Every pack on one T-type terminal board must share the same S1 hardware form, making an S1A or S1B mixture with IS420YDIAS1B unsupported.
Which IS420YDIAS1B connectors carry network, power, and field signals?
Two RJ45 ports provide Ethernet, the three-pin connector supplies 24/28 V dc, and the DC-37 interface carries terminal-board signals for IS420YDIAS1B.
A wetting-voltage diagnostic appears on IS420YDIAS1B; what field condition should be checked?
Check the terminal-board wetting supply, because IS420YDIAS1B monitors that field voltage and reports its loss or invalid state.
What timing information does IS420YDIAS1B preserve when a contact changes state?
State transitions on the 24 inputs are available from IS420YDIAS1B with 1 ms sequence-of-events resolution.
Under what condition can IS420YDIAS1B reject an attached terminal board?
Rejection occurs when the STCI or TBCI identity, DC-37 connection, or configured redundancy does not agree with the IS420YDIAS1B hardware definition.