Remote Range Control And External Measuring Range Indication; Figure 7 Figure - M&C PMA Series Instruction Manual

13.3.8

REMOTE RANGE CONTROL AND EXTERNAL MEASURING RANGE INDICATION

The 25-pole D-sub-connector X1 (see figure 8) allows the connection for the remote range control. For release
of this remote range control the measuring range selection switch at the front panel of the PMA30 (see figure
2, no. 6) has to be turned into position "Ext.".
The connections are potential separated.
In case of multiple range triggering the priority of measuring range choice is determined as:
Priority high
X1:
If no measuring range via X1 is triggered and the measuring range selection switch at the front panel of the
PMA30 is in position „Ext.", the 1 % measuring range is selected.
The external measuring range indication happens for the active measuring range via potential free contacts
also at X1.
Measuring range
X1:
Figure 8 shows a circuit for indication of the measuring range indication with LED's.
Figure 8
The used voltage supply at pin 13, pin 24 and pin 25 is potential separated.
The max. load current is 25 mA.
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1 %, 3 %, 10 %,
Pin 8 Pin 9 Pin 10
1 %, 3 %, 10 %,
Pin 5 Pin 4 Pin 3
External
selection switch
Status contact 2
Pin assignment of D-sub-connector X1
30 %, 100 %
Pin 11 Pin 12
30 %, 100 %
Pin 2 Pin 1
PMA30 | 1.01.03
Priority low
Jointly: Pin 13
Jointly: Pin 6
21