Digital guide
You are here:
GE IS220PDIAH1B
Technical Specifications: 24 optically isolated discrete input channels for dry contacts / 24–32 VDC sourcing; 1500 V AC optical isolation (channel-to-channel and field-to-logic); fixed 4 ms hardware debounce filtering; dual 10/100 Mbps RJ-45 IONet Ethernet ports for redundant deterministic communication; 24–28.6 VDC power input, 6.0 W max consumption; –30…+65 °C operating, –40…+85 °C storage; Class I Div 2 Groups A–D, ATEX Zone 2 Group IIC hazardous location rating; DC-37 pin D-sub field connector; compatible terminal boards IS200TDBSH2A, IS200STCIH1A/2A/8A, IS200TBCIH2C; per-channel open-circuit detection; module status LEDs; ~0.8 kg.
Detailed content
-
Functional Features: 1500 V AC optical isolation and 4 ms filtering eliminate intermittent faults from ground loops, VFD-induced noise, and electrical transients; dual IONet ports provide fault-tolerant redundant communication — uninterrupted data flow during cable or switch faults, critical for turbine ESD and safety systems; field-mountable on turbine skids without costly purge/pressurization; supports simplex, dual, and TMR configurations for high-availability signal integrity; internally sourced 32 VDC wetting voltage for reliable contact sensing.
-
Application Scenarios: Acquiring critical interlock signals from pressure switches, limit switches, and safety interlocks on gas and steam turbines and compressors; field-level discrete input collection near field devices to minimize long home-run cable runs; turbine protection and emergency shutdown (ESD) systems where signal loss causes costly trips.
-
Architectural Role: Sits at the Purdue Model Level 1/2 interface; bridges field contact sensors to the Mark VIe UCV controller over IONet; input-only pack — never mix with PDIO (combined I/O) or PDOA (output-only) modules.
-
Installation & Usage Notes: Use only approved TDBS/STCI/TBCI terminal boards — mismatched connectors cause permanent damage; mount the terminal board first, then plug the PDIA pack onto it via DC-37 connector ensuring no right-angle stress; connect dual IONet to redundant network switches or controllers; verify 24–28.6 VDC power with undervoltage lockout at 27.4 VDC; confirm hazardous-area installation compliance for Class I Div 2 / ATEX Zone 2; after installation, verify per-channel open-circuit diagnostics and comms health LEDs before placing in service.
