Single Safety Relay: Four pole with force guided contacts according to EN 50205 – 8A Three or Five NO 5A relays Factory installed ARC Suppression optional 7-28Vdc input power, AC options Option for CAN Bus port Antenna Internal or External IP67 environmental rating, GORE-Tex vented IEC60068-2-6 Vib/Shock type tested 900MHz 10mW or 2.4GHz 100mW radio(s) Two way DSSS RF transmission Wireless association (pairing) Six diagnostic LEDs FCC and IC approval(s)