Expanding galvanic isolator installation in CAB100A - CAB100

CAB100 Installation Guide

Document code
English (United States)
Document type
User guide
  • The galvanic isolators you plan to install
  • Small flat head screwdriver

For item codes, see Spare parts and accessories.

Vaisala recommends that you use the cable lead-throughs on top of the cabinet to lead the external wiring for the galvanic isolators into the cabinet.
The galvanic isolator cable contains wiring for 4 isolators. If the number of isolators inside CAB100A totals less than 4 after installation, leave the extra wires unconnected and the wire end caps in place.

Follow the steps below to add new galvanic isolators to an existing set of devices in CAB100A. A maximum of 4 isolators can be housed inside CAB100A.

Refer to CAB100A layout diagrams when planning the installation.

  1. Switch off mains power.
  2. De-energize the existing isolators.

    Disconnect the isolator power wires from the fuse terminal blocks located at the right-hand end of the power block.

  3. Take note of the wiring instructions printed on the side of the isolator. The information will be relevant when connecting wires in the intrinsically safe screw terminals of the isolator in 6.
  4. Mount the isolator on the DIN rail.
    CAUTION A safety distance of minimum 100 mm (3.94 in) must remain between the DL4000 data logger and the leftmost isolator.
    1. Make sure that the intrinsically safe blue screw terminals face up towards the top of the cabinet.
    2. Rest the locking mechanism at the back of the isolator on the DIN rail and push down firmly. This will click the device into place.
  5. To connect the new isolator, use the existing wires in the isolator cable.
    1. Discard the black wire end caps.
    2. Observing polarity, connect the isolator wires to push-in terminals 1 and 2, and the power wires to terminals 7 and 9 at the bottom of the isolator.