Electrical Design
‑81‑
Figure 3‑18 Anti‑interference processing of relay output terminals
Note
● If relay output terminals are connected to 220 V dangerous voltage, pay attention
to distinguishing them from the surrounding safety extra‑low voltage circuit
terminals to ensure correct connection. The requirements for reinforced insulation
must be taken into consideration during wiring.
● The external 220 V power supply connected to the relay must be used in an
environment with overvoltage class II (OVC II).
3.2.4 Control Circuit Wiring Requirements
Note
Wire the control circuit in accordance with EN 60204‑1.
Cable Selection Requirements for the Control Circuit
To avoid the influence of strong external interference noise on the control circuit, it is
recommended that the shielded cable with shielding layer be used as the signal
cable. The shielding layer must be connected to the equipment in 360° with signal
shielding brackets at both ends of the shielding layer. Separate shielded cables
should be used for different analog signals, and shielded twisted pair (STP) cables are
recommended for digital signal cables.
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