The RPM range of power relays has relays from 1 to 4 poles with 15A contact rating. There is a good selection of relays sockets and accessories to choose from. This 2 pole relay has two CO contacts. Each contact has a common point and one normally ope and one normally closed contact. Contacts have UL operational current ratings of 15 A at 277 Vac and 15 A at 28 VDC. This relay is designed to be pluged into a relay socket. All wiring is connect to the relay socket terminals. Relay has a 24 VAC 50/60 Hz coil. This relay has a bipolar LED to indicate the relay status. Relay is UL Listed when a RPZ relay socket is used. Relay is also CSA certified. Transient protection modules and hold down clips are available for this relay. Relay is UL Listed when a RPZ relay socket is used. Relay is also CSA certified. The Harmony electromechanical relay features flexible add-on accessories like protection module, timing module, maintaining clamp and marking legend. The Harmony electromechanical relay includes interface, miniature and power relays from 1 CO to 4 CO contacts, up to 30A.