The relays are mechanically linked, conforming to EN61810-1 and EN50205. The devices can be mounted on 35-mm DIN-rail or surface mounted with two screws, with a full range of four and six-pole contact configurations. The FGR-M1 can serve as the machine primary control element (MPCE) in applications of 6 A or less. For applications with heavier current, the relays should be wired in series between the heavy-current-carrying MPCE and a safety-monitoring relays, light curtain, or safety-rated redundant output controller.