DC Accessory Relay

Works well!

I used these relays with the three outputs of the MTC unit. Given that these output operate by closing to round it can be trick to get them to energize some devices with positive voltage. In mu case it was an alarm siren that has two tone... so one ground (-ve) and two +ve inputs. Use the Siren MTC outputs (1, 2 or 3) to ground the relay and energie it and then use the relay contacts to supply power to the device. Perfect! They are well made and function well.