GE IS200SRLYH2A Simplex Relay Output Terminal Board
Description:
IS200SRLYH2A is designed as GE Simplex Relay Output Terminal Board. IS200SRLYH2A is a simplex S-type terminal board accepting a PDOA or YDOA I/O pack and providing 12 form C relay output circuits through 48 customer terminals. The SRLY has the same physical size, customer terminal locations, and I/O pack mounting as other S-type terminal boards. There will be no components higher than an attached I/O pack, permitting double stacking of terminal boards. Each relay on SRLY uses an isolated contact pair as position feedback to the I/O pack.
The SRLY is available in two groups. The SRLY 1A comes with fixed box terminals and omits option board connectors JW1 and JW2. The SRLY 2A uses pluggable type terminals and has connectors JW1 and JW2 supporting option board connection. 

Specifications:
Number of Relay Channels on One SRLY Board: 12
Rated Voltage on Relays:  Nominal 24 V dc, 48 V dc, or 125 V dc
                                        Nominal 120 V ac or 240 Vac
Max Response Time On: 25 ms typical
Max Response Time Off: 25 ms typical
Contact Material: Silver cad-oxide
Contact Life: Electrical operations:100.000
                    Mechanical operations:10.000.000
Fault Detection: Relay position feedback using contact pair separate from load contacts
Dimensions: 15.9 cm high x 17.8 cm wide

Q&A:
1. What's the difference between IS200SRLYH1A and IS200SRLYH2A?
IS200SRLYH1A has fixed Euro style box-type terminal blocks and no ability to accept option boards.
IS200SRLYH2A has pluggable Euro style box-type terminal blocks and two connectors that accept a variety of different option boards.
2. How to install IS200SRLYH2A?
SRLY and a plastic insulator mounts on a sheet metal carrier and is then mounted to a cabinet by screws. If an option board is used, it plugs onto SRLYH2A or SRLYS2A and is held in place by the force of the connectors.