Connection To The Multifunction Relay; Digital Output (Mfr); Pin Assignment Mfr; Connect Signal Source To Mfr - SMA Sunny Tripower X 12 Operating Manual

SMA Solar Technology AG
6.8

Connection to the Multifunction Relay

6.8.1

Digital output (MFR)

The multifunction relay (MFR) is a digital output that can be specifically configured to the system.
In a system with multiple inverters, you must carry out the connection to the multifunction relay of the
System Manager.
6.8.2

Pin assignment MFR

Digital input
1 2 3
6.8.3

Connect signal source to MFR

Requirements:
☐ The technical requirements of the multifunction relay must be met (see Section 14, page 101).
Procedure:
1. Disconnect the inverter from all voltage sources (see Section 9, page 75).
2. Unscrew the swivel nut from the cable gland.
3. Remove the four-hole cable support sleeve from the cable gland.
4. Remove the plug from one of the enclosure openings and cut into the enclosure opening with a
utility knife.
5. Insert the cable into the enclosure opening.
6. Press the four-hole cable support sleeve with the cable into the cable gland and guide the
cable to slot MFR. Ensure that the unused enclosure openings of the four-hole cable support
sleeve are sealed with sealing plugs.
7. Strip 6 mm of the cable insulation at maximum.
8. Connect the cable to the 3-pole terminal block
according to the operating mode. Ensure that the
conductors are plugged completely into the terminal
points up to their insulation.
Operating manual
Pin
1
2
3
STPxx-50-BE-en-11
6 Electrical Connection
Assignment
NO
CO
NC
49