Mechanical construction
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– E650 Series 4 – ZMD400AT/CT, ZFD400AT/CT – User Manual
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The top row of terminals (level 1) consists of spring-loaded terminals and
comprises
Extension board terminals on the left
Depending on the version, up to 4 control inputs or 6 output contacts, 3
digital inputs and 2 relays outputs or a combination of these with maxi-
mum 6 inputs and outputs, or voltage connections for a separate supply.
Communication unit terminals on the right
The centre row of terminals (level 0) likewise consists of spring-loaded
terminals and comprises:
Voltage outputs U1, U2, U3 and N, tapped from the relevant phase
input
3 fixed control inputs with a common return line G (electrically isolated)
2 output contacts for transferring fixed valency pulses or control signals
(electrically isolated)
The lower row of terminals comprises the phase connections with input and
output of the circuit for each phase with the voltage connection in between
and neutral conductor.
Figure 30. Terminal layout ZMD400xT according to DIN
Apart from the common terminal layout according to DIN the ZMD400
meters are also available optionally with symmetrical terminal layout.
Figure 31. Symmetrical terminal layout ZMD400xT
Terminal layout
(example ZMD400xT)
