FUJI ELECTRIC INDUSTRY CO., LTD.

Both DI and DO modules of the THT type interface unit have the same structure, providing a smart appearance. The connector sockets and operation indicators are located at the center of the unit with 16 bits of DI and DO terminals arranged on the each side of the unit.
Since the terminal blocks on the right and left sides of the unit can be divided from the main unit, the main unit can be replaced without disconnecting wires.
The TJ-5.5 type test tool can be attached to the terminal block.

Interface unit with built-in DI module

The external terminal block (screw size: M4) incorporates the photo-coupler module. Input voltage can be converted from 110 V DC to 24 V DC when it is connected to the terminal block.
External surge voltage applied to the control panel is insulated via the internal photo-coupler module. Thus, the interface unit can minimize surge voltage, resulting in a noise immunity improvement.

Interface unit with built-in DO module

The external terminal block (screw size: M4) incorporates contact relays, enabling a 110 V DC circuit to be controlled with a signal (24 V DC) from a PLC.
With this structure, a conventionally-required intermediate terminal block can be eliminated, enabling a remarkable reduction in the number of parts mounted in the control panel and the number of wiring steps.

1. Ensuring long-term reliability
   To ensure reliability for a long period, the operating current of the 110 V photo-coupler drive circuit is fixed.
2. Preventing malfunction caused by diffraction by grounding at neutral point
   Operating voltage control value (60 V: No operation, 80 V: Operation) is specified to prevent malfunction.
3. Measures for DI (photo-coupler)module input current
   When input is turned ON, a transient current of several tens of amperes follows, and after cleaning the contact surface, approx. 2 mA current flows through the circuit. This structure results in thermal condition improvement.
4. Conforming to power standard (B-402)
   The THT type interface unit ensures high reliability in voltage fluctuation, insulation performance and noise immunity, in conformity with the power standard.
5. Up-screw type terminal block
   Since each terminal screw is held with a spring, the screws may not be dropped or lost.
   The screw size is M4, which
6. Terminal blocks can be removed from the main unit.
   The terminal blocks on both sides of the interface unit can be individually removed.
   Even if a failure occurs, you can replace the main unit without disconnecting wires.
7. Operation indicator lamp
   24 V DC output operation and power supply ON/OFF status are indicated with LEDs.
8. Separation of external wiring and in-panel wiring modules
   An external wiring terminals block is located in one side, and an in-panel wiring terminals block is located on the other side.
9. Connector for 24 V DC wiring
   PLC I/O wiring connector is provided.
10. 7000 V impulse withstand voltage
    The THT type is protected against high surge voltage (lightning impulse) between the input circuit and ground (including the output circuit).
11. Dedicated sequence checker
    The test jig (TJ-5.5CH) can be attached to the interface unit. Through quick connections, withstand voltage tests and sequence tests can be conducted.
    This method can remarkably reduces the number of in-factory test steps, contributing to a work efficiency improvement.