Introduction1IntroductionThank you very much for purchasing our Digital Indicator F377A.For good performance, and proper and safe use of the F377A, be sure to read this operation manual andproperly understand the contents of it before use. Also, carefully keep this operation manual so that it canbe referred to at any time.Cautions and Requests for Use● Do not disassemble the main body for modifications or repair.● Be sure to use crimp contacts for connection to terminal blocks, and do not to connect bare wires asthey are.● Be sure to ground the protective ground terminal.- The main F.G. is indicated by , it must be grounded with the protected earth.● Be sure to disconnect the power cable when performing the following.- Attachment / detachment of connectors of options.- Wiring / connection of cables to terminal blocks.- Connection of the ground line.● For sensor(s), external input / output, and option, use shielded cables.● Carefully check wiring, etc. before applying power.● Take an interval of more than 5 seconds when repeating ON/OFF.● Use F377A with correct supply voltage.● Take adequate shielding measures when using at the following locations.- Near a power line.- Where a strong electric field or magnetic field is formed.- Where static electricity, relay noise or the like is generated.● Do not install in the following environments.- The places where is exposed to direct sunlight.- The places where is the temperature and/or humidity exceeds the range in the specifications.- The places where is containing corrosive gas or flammable gas.- The places where is with large quantities of dust, salt or iron powder.- The places where is the product may be splashed with water, oil or chemicals.- The places where is the main body is directly affected by vibration or shock.