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Interface modules
Interface modules
Aventek offers interface modules. Relay cards are basically used to switch high voltage/current equipments like contactors motors etc. by means of low current controls. This isolates direct contact of control circuit with high voltage or high current. Relay card is used between output driver and switching device. Many times it is not feasible to connect switching outputs directly to instruments/controllers, relay card is used to interface between these two. One of the features of the relay card is LED indication to indicate status of control output. In case of short circuit at field, ie, valves, motors, etc, there is a fuse protection in the relay card in which fuse can be easily replaced and protects the instrument/controller. Relay card can be used where direct interlocks are required, eg, high voltage/current outputs switching by proximity switch. To make control circuit compact relay card is very useful, which reduces larger space taken by panel mount relays, wires for connections in control panel. Using detachable connectors and insulated mounting chassis, handling of these relay cards is very safe and easy. Mounting of these relay cards is made very easy by using DIN rail mount chassis. Consumption of current in these relay cards is very low which helps in using small power supplies avoiding large and bulky power supplies. To avoid screwed connections, FRC and D type connector type relay cards are also available. As per availability of voltage in control panels there is a wide range of input voltage in solid state relay card. Even if no voltage is available in control circuit, relay cards are available in different versions of power supplies. Power distribution cards are also available, which can be used instead of bulky bus bars. In case of solenoids where voltage fluctuation and noise instead takes place during switching, RC snubber cards are also available.