The MOD-RY4 is a modular unit with 4 x 250VAC 5A Non-Latching Relay ports.
Front of the module has four detachable screw terminal blocks.
Each port features two common pins allowing you to easily loop input voltages across multiple ports for simplified wiring.
Pinout - Top Row
Pinout - Bottom Row
The rear of every module contains a module port, used to connect the module into the modular controller base unit (DIN-MOD4, etc). The pinout for this port is not published.