9
COMM.
No contact switch module:
W1 and W2 are new types of no contact switch module which apply the advanced
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 be largely lower
the interference spark of the equipment, and greatly improve the stability and reliability of the system.
Protection elements are series wound to the output terminals, so it can control continuous current up to 0.2A with
maximum allowed instantaneous current 2A. Since the driver element is TRIAC, it is suitable for controlling
100-240VAC (not for DC power) with contactor which current below 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 100~220VAC supply, such as contactor and
electromagnetic valve, W1 module is recommended. To control DC or AC above 50VAC, users can only use
relay module. L2 module is small, and both its normal open and normal close terminals have the function of
spark absorption, but the capacity is small. It is suitable for alarm output. L1 and L5 have bigger volume and
capacity. In the 48mm dimension instrument (for example, D4, E, F and E5), only one of L1or 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.
