This board provides 4 electromechanical relays with NO (Normally Open) and NC (Normally Closed) connections.
4 Electromechanical relays with NO and NC positions
RJ45 connectors for Inputs. You only have to use standard networks cable to make all your connections.
Screw-On connections for all terminals.
Status LEDs on all relays connections. No more guessing. You can SEE all your signals.
All TTL +5VDC or +3.3VDC Signals. Interface directly with parallel port interface products and other cards.