User Manual

2. Wiring Precautions

Caution

• Do not leave wire remnants in the instrument, as they could cause a fire or malfunction.

• Use the solderless terminal with an insulation sleeve in which the M3 screw fits when wiring the

instrument.

• The terminal block of this instrument is designed to be wired from the left side. The lead wire must be

inserted from the left side of the terminal, and fastened with the terminal screw.

• Tighten the terminal screw using the specified torque. If excessive force is applied to the screw when

tightening, the terminal screw or case may be damaged.

• When using a terminal cover for the BCS2, pass terminal wires numbered 7 to 12 into the holes of the

terminal cover.

• This instrument does not have a built-in power switch, circuit breaker or fuse.

It is necessary to install a built-in power switch, circuit breaker or fuse near the controller.

(Recommended fuse: Time-lag fuse, rated voltage 250 V AC, rated current 2 A)

• For a 24 V AC/DC power source, do not confuse polarity when using direct current (DC).

• Do not apply a commercial power source to the sensor which is connected to the input terminal nor

allow the power source to come into contact with the sensor.

• Use a thermocouple and compensating lead wire according to the sensor input specifications of this

controller.

• Use the 3-wire RTD according to the sensor input specifications of this controller.

• For DC voltage input, (+) side input terminal number of 0 to 5 V DC, 1 to 5 V DC, 0 to 10 V DC differs

from that of 0 to 1 V DC.

Model

Terminal Number

BCS2

: (+) side of 0 to 5 V DC, 1 to 5 V DC, 0 to 10 V DC

: (+) side of 0 to 1 V DC

BCR2, BCD2

: (+) side of 0 to 5 V DC, 1 to 5 V DC, 0 to 10 V DC

: (+) side of 0 to 1 V DC

• When using a relay contact output type, externally use a relay according to the capacity of the load to

protect the built-in relay contact.

• When wiring, keep input wires (thermocouple, RTD, etc.) away from AC sources or load wires.

3. Operation and Maintenance Precautions

Caution

• It is recommended that AT be performed on the trial run.

• Do not touch live terminals. This may cause electric shock or problems in operation.

• Turn the power supply to the instrument OFF when retightening the terminal or cleaning.

Working on or touching the terminal with the power switched ON may result in severe injury or death

due to electric shock.

• Use a soft, dry cloth when cleaning the instrument.

(Alcohol based substances may tarnish or deface the unit.)

• As the display section is vulnerable, do not strike or scratch it with a hard object or put pressure on it.