5V / 12V / 24V 8 Channel Relay Module red Interface Board Optocoupler High/Low Level Triger for Ardu

1. 8 effective way are high, that high relay.
2. each relay has normally open and normally closed contacts.
3. 8 Road are optically isolated, safe, reliable, high anti-interference.
4. can be selected with a jumper relay and TTL common ground common ground or not.
5. with power indicator light. 8 Each has a status indicator.
6. with the relay coil to absorb diode protection.
7. the circuit board size 140mm X 55mm mounting hole size 133mm X 40mm

1. Relay 5V
2. 8 ways are high, namely high relay.
3. Each relay has normally open and normally closed contact.
4. 8 ways, optically isolated, safe, reliable, high noise immunity.
5. Can be selected by jumper relay and TTL or ground.
6. With a power indicator. 8-way road has a status indicator.
7. With the relay coil to absorb the diode protection.

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