technology of “burn proof” and zero crossing conduction. It can replace the relay contact switch. Compared to
the relay contact output module, W1 and W2 have longer life and lower interference. They can largely lower the
interference spark of the equipment, and greatly improve the stability and reliability of the system. Since the
driver element is TRIAC, it is suitable for controlling 100-240VAC (not for DC power) with current up to 80A. For
the current larger than 80A, an intermediate relay is needed.
Relay Switch Module : the relay modules are widely used in industrial control. However, they are the only
modules with life time limit and volume limit and have much electromagnetic interference. It is important to
choose a suitable relay module. To control equipments with 220VAC supply, such as contactor and
electromagnetic valve, W1 module is recommended. To control DC or AC below 100V, users can only use relay
module. L2 module is small, and both its normal open and normal close terminals have the function of varistor
spark absorption, but the capacity is small. It is suitable for alarm output. L1 and L5 have big volume and big
capacity. In the 48mm dimension instrument (for example, D2, E, F and E5), only one of L1 or L5 can be
installed. L5 has dual output, can be used to support two loops of alarm, for example, AL1+AL2. If you don’t
like mechanical switch, you can choose G5 (dual SSR voltage driver) and connect with external SSR instead.
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