Induction loop controller, 1 channel, 2 relays

With the T20, it is possible to detect when a vehicle passes over the loop, allowing a control signal to be sent to the barrier to open it. It is ideal for locations where vehicle access needs to be regulated, but identification-based access control is not required.

Features:

The device has two independent relay outputs with different operating modes:

- Relay 1 (absence detection – adjustable): when the vehicle leaves the loop, the relay is activated for 500 ms.
- Relay 2 (presence detection – non-adjustable): the relay remains continuously activated as long as the vehicle is detected on the loop.

The device performs automatic tuning on power-up, but the operating frequency and sensitivity can also be adjusted manually. It is DIN-rail mountable and is equipped with an MT740 socket.

Operating frequency band adjustment:

If two loops are installed next to each other, the DIP4 switch on the two controllers must be set to different positions to eliminate interference. The DIP switches are located on the PCB inside the device, accessible by carefully removing the device cover.