GE IS220PDOAH1A PDOA Discrete Relay Output I/O Pack

Description

Hardware & Electrical Specifications

‑ Model：IS220PDOAH1A ‑ Part Number：IS220PDOAH1A ‑ Module Type：PDOA Discrete Relay Output I/O Pack ‑ Mounting：Installed in Mark VIe I/O pack rack ‑ Power supply：24 VDC backplane power, operating range 22.8‑28.6 VDC, typical power consumption 8.5 W ‑ Output channels：12‑channel relay drive outputs, works with external relays on terminal boards; typical response time approx 6 ms from Ethernet command to contact actuation ‑ Communication interfaces：  • Dual redundant 100 Mbps RJ45 IONet Ethernet ports for controller communication  • DC‑37‑pin connector for connection to discrete output terminal boards ‑ Compatible terminal boards：TRLYH1B, TRLYH1C, SRLY series terminal boards ‑ PCB treatment：Conformal coated for dust‑moisture‑corrosion resistance ‑ On‑board protection：ESD protection, MOV surge suppression, optical isolation 1500 V between field and logic side, built‑in self‑diagnosis for drive circuit, open‑circuit and hardware fault detection ‑ Compatibility note：Cannot run standalone; must match Mark VIe I/O pack rack, main controller and corresponding TRLY/SRLY terminal boards; full signal‑loop simulation test mandatory after replacement.

Environmental Specifications

‑ Operating temperature：‑30 ℃ ~ +65 ℃ ‑ Storage temperature：‑40 ℃ ~ +85 ℃ ‑ Relative humidity：5%‑95% non‑condensing ‑ Installation location：Indoor turbine control cabinet ‑ EMC compliance：IEC 61000‑6‑2 ‑ Certifications：CE, UL Class I Div 2 hazardous location certification

Mechanical Data

‑ Weight：approx 0.5 kg ‑ Dimension：Standard Mark VIe I/O pack module form‑factor ‑ Handling note：ESD‑sensitive PCB; relay drive circuit, anti‑static wrist‑strap mandatory during handling ‑ Terminal tightening torque：0.6‑1.0 N·m

Main Functions

1. Receive discrete on‑off control commands from Mark VIe main controller via redundant IONet bus.
2. Generate drive signals for external relays mounted on matched terminal boards to control solenoid valves, contactors, trip coils, indicator lamps and auxiliary devices.
3. Read relay‑contact feedback status from terminal board and upload real‑time output state to the controller.
4. Continuous self‑diagnosis for each output drive channel, detect open‑circuit, abnormal load and module hardware faults, report fault alarm status.
5. LED status indication:   ‑ Green LED：Module power supply normal / PWR status   ‑ Yellow LED：LINK / TxRx IONet communication activity indicator   ‑ Red LED：ATTN / module FAIL fault alarm

Installation & Wiring Requirements

1. Cut off I/O pack rack power supply before replacement. Hot‑swap is forbidden. Strict anti‑static protection when handling PCB board.
2. Insert module into designated slot of I/O pack rack, lock module latch to ensure reliable backplane contact.
3. Field discrete output wiring strictly follow GE Speedtronic Mark VIe wiring manual; signal cables shall be separated from high‑power cables; connect shielding to dedicated ground terminal.
4. Complete protective grounding according to GE system specification.
5. After replacement: verify I/O pack power‑on status, perform each channel output test and output‑loop commissioning test.
6. Replacement note: For TMR triple‑redundant system application, hardware consistency and firmware‑version matching shall be verified; full signal‑loop simulation test mandatory before unit put‑into‑service.