Connecting voltage cables and thermocouples

Connecting wires to a screw-type terminal block

WARNING

For screw-type terminal blocks, use specially designed screws to secure connections.

Use of other screws could result in electric shock or equipment damage.

Applicable modules: U8550, U8553, LR8530, LR8533

You will need: a Phillip’s head screwdriver (No. 2) and an input cable or thermocouple

 

Recommended wire diameter

Single-wire

Diameter of 0.2 mm to 1.29 mm (AWG 32 to 16)

Stranded wire

0.03 mm2 to 1.38 mm2 (AWG 32 to 16)

Standard stripping length

10 mm

1 Open the terminal block cover.

2 Loosen the terminal block screw. Insert the tip of the cable as shown in the figure and tighten the screw.

Tighten the terminal block screws to 0.4 N·m (recommended; 0.8 N·m at a maximum).
Cable insulation colors vary by country and manufacturer. Check before connecting.

 

3 Connect the cable to the measurement target.

4 Close the terminal block cover.

When measuring an instrumentation device (inputting a 4-20 mA current), connect a 250 Ω shunt resistor as shown in the figure. For more information about measuring instrumentation devices, see “Measuring voltage” in the Instruction Manual.

 

Connecting wires to a push-button terminal block

Applicable modules: U8551, U8552, U8554, LR8531, LR8532, LR8534

You will need: a flat-head screwdriver (with a tip width of 2.6 mm) and an input cable or thermocouple

 

Recommended wire diameter

Single-wire

Diameter of 0.32 mm to 1.29 mm (AWG 26 to 16)

Stranded wire

0.2 mm2 to 0.52 mm2 (AWG 24 to 20)

Standard stripping length

9 mm

1 Open the terminal block cover.

2 While pressing down the terminal button with the flat-head screwdriver, insert the front end of a wire into the terminal opening.

Cable insulation colors vary by country and manufacturer. Check before connecting.
For more information about Strain Unit input terminals, see Setting the DIP switches for input connections.

 

Plug-in modules

Wireless modules

3 Remove the flat-head screwdriver from the button.

The cable will be locked in place. Pull gently on the cable and verify that it does not come out.

4 Connect the cable to the measurement target.

5 Close the terminal block cover.