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GE IS2020DRLYH1AA
Product Name: GE Relay Output Terminal Board (DRLY Series)
Product Overview: The IS2020DRLYH1AA is a 12-channel relay output terminal board developed by GE for the Mark VI Speedtronic turbine control system, designed to convert the controller’s 24 VDC logic signals into passive contacts to directly drive AC/DC loads such as fuel shutoff valves, alarms, and ventilation dampers.
Detailed content
Technical Specifications:
- Product Category: Relay Output Terminal Board (DRLY Series)
- System Platform: Speedtronic Mark VI
- Relay Count: 12 C-type (SPDT) relays
- Contact Rating: 5 A / 250 VAC, 5 A / 30 VDC (resistive load)
- Coil Power: 24 VDC (supplied by cabinet backplane)
- Isolation Voltage: 1500 VAC (channel-to-system)
- Connection: 37-pin D-Sub female (interconnected with VCRC I/O board via cable)
- Mounting: Wall mounting (dedicated for simplex applications)
- Operating Temperature: -40°C to +70°C
- Certifications: CE, UL, CSA (general industrial grade)
- Dimensions/Weight: 160 × 110 × 45 mm / approx. 250 g
Functional Features:
- 12 C-type contacts, each independently configurable for NO/NC output
- High-speed interconnection with VCRC processor board via 37-pin D-Sub for hardware-level protection and sequential control
- Onboard LEDs for real-time display of each relay status for quick fault contact location
- All relays can be hot-swapped during unit operation, reducing maintenance time from hours to minutes
- Hardware-level safety isolation at 1500 VAC, capable of withstanding grid surges and excitation backfeed
- C-type contacts feature mechanical holding; state does not drift after power loss, meeting SIL2 “fail-safe” requirements
- High contact rating 5 A/250 VAC allows direct driving of fuel solenoid valves and high-power alarms, eliminating intermediate relays and reducing wiring and fault points by 30%
Application Scenarios: 9E/9F class gas turbines, compressor trains implementing “single-point-no-trip” safety strategy as the ideal hardware foundation.
Installation Requirements:
- Must be wall-mounted and used only in simplex redundant applications (unlike other Mark VI boards that mount on DIN rail)
- Connection to VCRC I/O processor board via 37-pin cable connector (same connector as used on TRLY terminal boards)
Usage Notes:
- Plug-and-play with VCRC processor board via 37-pin D-Sub, no additional configuration required
- DIN rail (35 mm) front-exit wiring design enables online replacement during unit operation
