Connecting relays - OPT100

OPT100 Installation Guide

Document code
Document type
User guide
  • Relay cable with 0.14 … 4‑mm2 (26 … 12 AWG) conductors and 7 … 12‑mm (0.28 ... 0.47 in) external diameter for connecting external devices to the relays. Verify that the required current carrying capacity matches the specification of the cable.
  • Screwdriver with 3-mm-wide (0.12‑in) slotted head
  • Adjustable wrench

Maximum switching current of the relays:

  • 6 A (at 250 V  AC)
  • 2 A (at 24 V DC)
  • 0.2 A (at 250 V DC)

If the diameter of your relay cable is not compatible with the cable gland marked Relay out, you can use either of the two cable glands marked Spare (diameter 5 ... 10 mm (0.2 … 0.39 in)). If the Relay out cable gland is left unused, remember to plug it so that the cabinet remains tight.

Operation of relay outputs is available from software version 1.4.0 onwards.

  1. Open the cable gland marked Relay out on the power supply unit. Remove the plug and store it for later use.
  2. Prepare the cable for connection:
    1. Measure how much cable you need to reach from the cable gland to terminal block X3.
    2. Remove the outer sheath and cable braid from the part of the cable that will be left inside the power supply unit.
    3. Strip the ends of the individual wires to expose the conductors for 1 cm (0.4 in).
    4. Remove some more of the outer sheath to expose more cable braid. This part of the braid should be connected to the cable gland.
  3. Insert the relay cable through the outer nut and the inner seal, and start inserting the cable through the cable gland. Stop when you reach the section of the cable where the metal braid is exposed.
  4. Arrange the cable braid so that it makes contact with the cable gland when it is closed. Push the inner seal in place and tighten the outer nut.
  5. Inside the power supply unit, connect the wires to terminal block X3. Wire the connection as normally open (NO) or normally closed (NC) according to the table below.
    Verify the wiring colors of your cable before making any connections.
    Table 1. Terminal block X3 wiring
    Signal Terminal
    Relay 1 NC 1
    Relay 1 common 2
    Relay 1 NO 3
    Relay 2 NC 4
    Relay 2 common 5
    Relay 2 NO 6
    Relay 3 NC 7
    Relay 3 common 8
    Relay 3 NO 9
    Figure 1. Terminal block X3 example wiring for normally open (NO) connection