The instruction manual describes the operation and function of the Keyence Visual KV Series PLCs using KV Studio software from programming. Reading this manual will ensure safe use of this KV Series PLC and the greatest performance. The PLC KV-10AR is a part of the Keyence Visual KV Series. This KV-10AR unit is a 10-I/O basic unit that has an AC power type, along with the KV-10AT and KV-10ATP. This Keyence AC powered KV-10AR unit is a relay output type of PLC. The letter "R" in the part number of KV-10AR, means that this Keyence Visual KV Series Unit is a relay output type unit. And the letter "A" in this part number of KV-10AR, tells you that this Keyence unit is an AC power type unit. The part number can tell you a lot about a Keyence Visual KV Series Unit, for example in the part number KV-10AR, the number 10 tells you that the unit has 10 I/O points. Be sure to use this KV-10AR unit with accurate safety precautions and regard the ratings and functions of this Keyence unit. When using the Visual KV Series by Keyence, safety precautions should arise in these following environments, like in combustion devices, railway facilities, amusement machines, nuclear power control, vehicles, safety equipment, medical equipment, and air service facilities. Spark killers need to be connected when using a relay output type of Keyence Visual KV Series Unit for the unit to withstand an accurate voltage against the load of the output terminals in the parallel contacts.