Lenze 7812 - 4 Installation Instructions; 5 Conriectirig Instructions; External Set-Value Adjustment; Using Poteritioxrieter

ET46/fa checked: 19.04.89 ~4B 33.0831 GB page: 4
4. Installation instructions
The controller should be fitted vertically with the terminals located
at the bottom. Ensure that there is a free space of
± :LOOin~ at the top and bottain, and 50 mm at the sides in order to
inaintain the flow of air tI~xrough the heat sink and controller. The
maxrmmm ambient temperature must not exceed 40
0C.
In case of an earth circuit fault, the mains choke limits the current
rise and improves the ~nains current factor. The 7800 inverter series
inust only be operated with specif led mains choke and sexni-conductor
fuses (see paint 10./il.).
5. Connectinc~ instructions
5..l External set—value
5..l.1 Usinc~ potentioxneter
(-) +10V
— Corrnect the enclosed
potentiometer 1 kfl linear
(part no..: 304 651) to
terminals 11, 12, 13,
ensuring that the wiper
of the potentiometer is
connected to l2~
5.1.2
— Connect the external master voltage
source to terminals 11 and 12.
Umaster max = 10 V
— For a master voltage
of 0 to—lOV the wire link ~
UmastermaxiOV must be connected as
shown in the figure.
5..l..3 Usinq~ current loop control ~f~B3Ocf12
— Connect the external current source
between terminals 11 and Cl.
‚master = 4 ~- 20mA
- For giving speed control froln
a 0 to 2OmA current signal, ensure
that a 511 fl resistor
(‚-x=~t ;o. 225 ?D2) is c~nm-.ccted
— -~ —.
master