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3 overview of the analog inputs, 4 handling the shield contact – SMA SC 400HE Installation User Manual

Page 85

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SMA Solar Technology AG

External Connections

Installation Guide

SCxxxHE-IEN104432

85

6.7.3 Overview of the Analog Inputs

If you use sensors other than those listed here, contact the SMA Serviceline.

6.7.4 Handling the Shield Contact

The external signal and bus cables must be shielded. The shield must contact the shield bus, provided
for this purpose, along a large surface area.
The contact is made with the shield clamps included in the delivery.

Assignment of the analog inputs on the Sunny Central Control
When connecting the analog inputs and for the digital signals, it is obligatory to follow the
circuit diagram included with delivery.
The connection is made at the connection terminals. Here, the connections for
four‑conductor and two-conductor sensors should be noted and any required measuring
converters should be made available.

Analog inputs

Ain

Name

Meaning

Customer

Ain1

ExtSolP

External default nominal value for active power

Customer

Ain3

ExtSollrr

External radiation sensor

Customer

Ain4

ExtGlolrr

Pyranometer (measurement of global solar
irradiation)

Customer

Ain5

ExtAlarm

External alarm input, e.g. for monitoring the
functioning of the medium-voltage transformer

Customer

Ain6

ExtSolQ

External default nominal value for reactive power

Customer

Ain8

TmpExt C External temperature sensor / PT 100From

production version "C", this PT 100 is installed as
standard at the factory.

NOTICE!
The shield clamps could become damaged through improper handling

• The shield clamps must only be hand-tightened. Never use a screwdriver.
• Tightening the clamps with the use of a screwdriver can damage the insulation of the

individual insulated conductors in the cable.

The correct handling of the shield clamps is shown in
the figure on the right.

This manual is related to the following products: