Modules RY1 and RY2
Modules RY1 (non-latching) and RY2 (latching) are NAI’s latest generation Relay Modules. They provide multi-channel, signal switching capabilities up to 220 VDC / 250 VAC @ 2 A maximum (cumulative maximum switching power 60 W / 62.5 VA per channel). These modules are used in our multifunction embedded boards and SBCs, and also for testing and non-critical embedded applications.
These two mechanical relay-interface modules feature four individual single-pole, user SPDT Form C (changeover/break-before-make type) relays (channels). Each channel has a common input terminal (C), a normally closed output terminal (N/C), and a normally open (N/O) output terminal. The channel either energizes or de-energizes the relays (close or open) so that the signal provided on (C) may be switched/directed to either the (N/C) or (N/O) terminals.
The second set of pole contacts is used for the Background Built-In-Test (BIT) status. Interrupts can be enabled/configured for each channel to indicate if a BIT fault (state of secondary set of contacts does not match command) occurs. Internal de-bounce circuits for each channel provide the required time delay to eliminate false signals resulting from contact bounce commonly experienced with mechanical relays and switches.
RY1 Relay Non-Latching Module
The relays on this module remain de-energized or in the "reset" position until commanded to the "set" position. The contacts remain in the "set" position until commanded to the "reset" position. A board-level reset is issued if power is removed from the board or the module.
RY2 Relay Latching Module
The relays on this module use magnetic latching to assure that once a relay channel is "set" or "reset," the channel will remain at the last commanded position, even if power is removed from the board or the module.