4 pin relay 4 pin relays use 2 pins 85 86 to control the coil and 2 pins 30 87 which switch power on a single circuit. It must be wired the correct way round for it to operate.
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Very handy little relay wiring diagram. Circuit diagram this relay is polarised and is therefore suitable for alarm bell circuits. The difference between a 4 and 5 pin relay is that a 4 pin relay is used to control a single circuit whereas a 5 pin relay switches power between two circuits. Consultants uk ltd tel. There is also a back emf suppressing diode. Handy little relay 12vdc tk. Microsoft word vhlr3doc.
Microsoft word vhlr3doc. Sample applications very handy little relay 0 lnÿut. Sample applications very handy little relay 0 lnÿut. Rated at 8a at 240vac 8a at 30vdc indicator red led dimensions. There is also a back emf suppressing diode. It must be wired the correct way round for it to operate.
Circuit diagram this relay is polarised and is therefore suitable for alarm bell circuits. 0845 43 00 33 5 fax. 0845 43 00 33 6 email. How to wire a magnetic lock with backup battery exit button and key switch. The very handy little relay is mounted on a printed circuit board that has screwed terminals for easy interconnections complete with led indication. Other handy little relays available are 12 volt dc coil junior 1 inch2 12 volt or transistorised a polarised 24 volt dc coil and a toggled onoff latching relay.
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