The IS2020DRLYH1AA model is described by General Electric as a Relay Output Terminal Board. This specific version is just of many of the DRLY boards and is specifically a DRLYH1A group variation. There is a DRLYH1B group variation that has relay contacts that operate on less power than this DRLY model. One downside of this specific board is that it does not have any hazardous location certifications according to the GEH-6421C Volume II Speedtronic Mark VI Turbine Control System Guide. One important note about the DRLY board to make is that while other boards in the Mark VI system will be DIN-Rail mounted this specific unit must be Wall-Mounted, and can only be used in a Simplex Redundant Application.
When observing the DRLY board one can determine that there are several components, mainly the twelve relay output relay contacts. These form-C relay contacts are used for operating with the VCRC I/O processor board. When connecting the VCRC and IS2020DRLYH1AA boards together it will be done through the thirty-seven-pin cable connector which is identical to the one that is used on the TRLY terminal board.
VMIVME-7591 VMIVME-7698
VMIVME-7592 VMIVME-7740
VMIVME-7695 VMIVME-7750
VMIVME-7697 VMIVME-7751
VMIVME-7697A VMIVME-7765
VMIVME-7750
IS220PVIBH1A
IS420UCSCH2A
5SHY3545L0010 3BHB013088R0001
3BHE009681R0101 GVC750BE101
ICS TRIPLEX T8310
ICS TRIPLEX T8461
ICS TRIPLEX T8151B
ICS TRIPLEX T8403C
ICS TRIPLEX T8311
ICS TRIPLEX T9402
ICS TRIPLEX T9451
IS215VCMIH2BB
IS215VCMIH2CA
ABB PM866K01 3BSE050198R1
ABB 216NG63
ABB 216VC62a
ABB 216EA61b
ABB 216AB61
ABB 216DB61
ABB REG216
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