Description

IS220PDIOH1B Discrete Input / Output I/O Pack

Technical Specifications

• Product Model: IS220PDIOH1B
• Brand: GE Vernova (Mark VIe Speedtronic series)
• Warranty: One Year
• Input Voltage: 18‑32 VDC IONet I/O pack power; nominal 28 VDC supply; max 5 W consumption
• Operating Temperature: ‑40 °C ~ +70 °C cabinet‑mount; ATEX Zone2 / Class I Div2 certification
• Storage Temperature: ‑40 °C ~ +85 °C
• Response Time: Local I/O processing; typical 10 ms channel refresh; local onboard micro‑processor
• Protection Class: IP20, cabinet‑mount I/O pack; not for direct field installation
• Accuracy Class: Discrete contact‑signal acquisition & relay switching; no analog measurement
• Output Frequency: Static discrete control; pulse‑output supported via control logic
• Rated Current Range: 24‑channel digital contact inputs; 12‑channel Form‑C electromechanical relay outputs; relay contact rating 5 A @120 VAC / 3 A @125 VDC
• Communication Interface: Dual 10/100 Mbps Ethernet IONet ports; front‑panel status LED indicators (Link/Act, Power, Attn); mates with TDBS / TDBT series external termination boards
• Supported Protocols: GE IONet; communicates to UCS main controller e.g. IS420UCSCH1B; supports simplex, dual‑redundant and TMR system architectures
• Overload Capacity: On‑board watchdog; channel‑diagnostic monitoring; no built‑in field‑side fuses; external fuses required on termination board
• Dimensions: 292 mm × 130 mm × 27 mm; weight approx 0.2 kgxrdge.com

Product Overview

The IS220‑PDIOH1B is a distributed discrete‑I/O pack for GE Mark VIe turbine‑generator control systems. It integrates 24‑point digital contact inputs and 12‑point Form‑C relay outputs within one IONet‑connected remote pack. It collects status signals from field limit switches, interlock contacts and push‑buttons, and drives external auxiliary relays, alarm annunciators and solenoid loads. The embedded local processor handles signal filtering, channel diagnostics and time‑stamping before transmitting data over redundant IONet Ethernet to the UCS host controller.

This I/O pack addresses distributed‑control challenges: high‑density mixed discrete‑I/O for turbine sequence and safety‑interlock loops, dual‑Ethernet network redundancy, and drop‑in spare‑part compatibility for legacy Mark VIe retrofit projects. Turbomachinery‑control engineers, power‑plant maintenance technicians and system‑retrofit integrators benefit most. It pairs with TDBS‑/TDBT‑series termination boards, and applies for gas‑turbine, steam‑turbine and combined‑cycle power‑generation unit sequence‑control, interlock‑monitoring and alarm‑actuation functions. (Word count:177)

Key Application Notes

• Mark VIe IONet I/O pack; must connect to UCS‑series main controller (e.g. IS420UCSCH1B); cannot run standalone
• Requires matching external termination board such as IS200TDBSH2A / IS200TDBTH2A for field‑wiring termination
• Dual Ethernet ports support redundant IONet network path to eliminate single‑communication‑point failure
• Not hot‑swap capable: power must be removed before pack replacement
• No intrinsic‑safety rating; for safe‑area / Zone 2 cabinet‑installation only; cannot connect to Zone 0/1 field instruments
• Relay contacts require external surge‑suppression for inductive loads; external fuses shall be fitted on field‑wiring side
• Conformal‑coated hardware variant available for high‑humidity and high‑contaminant cabinet environments
• Successor part for older IS220PDIOH1A; widely used spare for power‑plant turbine‑control maintenance and retrofit projects