Danfoss ECL Comfort 296 Service Manual - Page 10

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Service guide

8.0 Annexure B

There are many prebuilt connection options available on the market

on "surge protector base parts", which lead to the unwanted ground

looping and hence low quality / loss of communication network

(section 5 point 5).

These parts look alike in part numbering system and in component

outlook. So care must be taken to select the right parts. Refer the

below for example:

Possibilities for grounding the base element:

• PT 1x2-BE - signal ground (pin 9/10) is shorted to PE (protective

earth) (3/4)

• PT 1x2+F-BE - spark gap between signal ground (pin 9/10) to

PE (protective earth) (3/4)

ECL 296 / ECL 310 Modbus

PT 1x2-BE

PT 1X2 +F-BE

VI.LV.H1.02