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The ORB-100 Output Relay Board adds up to four (4) Form-C KYZ relay outputs
and two (2) digital inputs to the Landis & Gyr S4 family of solid-state
meters. It has been designed to be functionally equivalent to the Landis &
Gyr output relay board (L&G part # 69520-X), but with higher isolation
voltages and added surge protection. The ORB-100 is offered in 1, 2, and
4-channel KYZ output configurations.