Nastec HMA 218, Руководство по эксплуатации

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Communication with HMA Ready device
The communication between the HMA and the HMA ready device that is intended to be powered is made via serial port
RS485 COMBO.
It is enough to use a three wire cable with a minimum section of 0.5 mm2 connected to the terminals S1 +, S1-,G.
4.1 Protections
The protections required upstream HMA depend on the type of installation, and local regulations.
Safety protections on both AC and DC side must be used.
For DC side we recommend to use 1000 VDC circuit breaker and, if possible, 1000 VDC surge protection.
For AC side we recommend to use overload protection with the characteristic curve of type C and type B circuit breaker,
sensitive to both AC and DC current.
4.2 Electromagnetic compliance
To ensure electromagnetic compatibility (EMC) of the system, it is necessary to apply the following measures:

Always connect the device to ground

Use shielded signal cables by placing the screen at one end.

Use motor cable as short as possible (<1 m / <3 ft). For longer lengths, it is recommended to use shielded cables
connecting the screen at both ends.

Separate signal, motor, and power supply cables.