4 potential-free relays can be controlled per receiver in combination with the multifunctional receiver SHR-12 K4.

On a large factory site, signs with the corresponding gate number are mounted above the individual gates. This gate number also corresponds to the address which must be entered into the handheld transmitter. An SHR-12 K4 is also installed at each gate. If relay 1 is set, the gate will move up. If relay 2 is set, the gate will move down. By configuring the receiver appropriately, relay 1 and relay 2 can be mutually interlocked.

Each door also has a light and a siren, which can also be controlled with the handheld transmitter. For this purpose, light and siren are controlled by relays 3 and 4. The timers for these relays are set in such a way that the relays are set for 10 minutes after the transmitter command is received and then drop out automatically.

The corresponding symbols are set on the handheld transmitter: Arrow up for up, arrow down for down, square for stop, star for siren and light. With the large embossed keys and the protection class IP65, the handheld transmitter can be operated even under rough conditions and with gloves. The shock protection provides additional protection and its grip prevents the handheld transmitter from slipping away from the dashboard.