Hello friends,
Please help me for Open Relay Output.
My device is a Digital Meter Relay ( Manual: http://www.tsuruga.co.jp/foreign/products/452a/ ), I need to open output of relay to switch on the Output for control other device.
But I can not the Open Collector output because I can not understand this data.

 

There are 5 open collector outputs (AL1, AL2, AL3, AL4 and GO) The collector of each of the 5 transistors is connected to one of these 5 output terminals.
All 5 NPN transistors will have their emitters connected to a common terminal. This terminal will go to the negative of the supply for the loads that you are driving with these transistors. (For example we will use the example of a relay coil.) Each load (Relay coil) will have one side connected to the positive of your supply. The other side of the load will connect to one of the 5 output terminals. Your power supply for the loads must be less than 30 volts (IT MUST BE DC) The load must draw a current of less than 30 mA. When the output for the output is active the transitor behaves like a switch contact between the common negative and the output terminal. It does not behave quite the same as a normal switch or relay contact as it can have up to a 1.6 volts voltage drop, (Rather than almost zero for a normal contact.) If you are using inductive loads such as relay coils you should put a diode in parallel with each relay coil to limit the back EMF. It is possible that the unit already has these diodes built in. If so there will be an extra teminal to connect the positive of your supply to. On the link you posted there is a button to link to the user manual, YOU NEED TO READ THIS.

Les.