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Installation and uninstallation
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– E650 Series 4 – ZMD400AT/CT, ZFD400AT/CT – User Manual
Figure 55. Meter connections (example ZMD400xT, terminal layout according to DIN)
Artificial star point
With the three-wire circuit the artificial star point (terminal 11) must not be
externally wired.
4.3.2
Connecting the signal inputs and outputs
Maximum current at auxiliary terminals
The circuits connected to the auxiliary terminals must be built in such a way
that the maximum current is never exceeded, as this might damage the
meter.
Maximum current of the voltage outputs: 1 A.
Maximum current of the output contacts: See 4.3.3
”.
Use fuses or protective relays between external and internal circuits to
avoid defects and a possible exchange of the meter.
1.
Shorten the connecting wires of the signal inputs and outputs to the
required length and strip them for approx. 4 mm (wires and strands up
to 2.5 mm² can be connected).
Use ferrules with stranded wires
If stranded wire is used, provide it with ferrules for connection.
2.
Connect the connecting wires of the signal inputs and outputs as
follows to the screwless spring-loaded terminals (the terminals are
numbered as shown on the connection diagram):
– Insert a size 1 screwdriver in the upper opening and insert it turning
slightly upwards (figure 56 A).
– Now place the stripped connecting wire in the lower opening and
hold it there securely (figure 56 B).
– Withdraw the screwdriver. The connecting wire is then firmly fixed
(figure 56 C).
