ET200S, output voltage is always at 16 V

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Split from about SIEMENS PLC.

For 2-wire wiring, you should short the following pins:
for Channel 1:
QV+ and S+ (Pin1 and 2), Mana and S- (Pin3 and 4), and measure QV+ and Mana, you will get the right voltage.
for Channel 0:
Short Pin5 and 6, Pin 7 and 8, same as above. 

FOR  -10 to +10 VOLT

high limit: +27648 (+10 V)

low limit:  -27648 (-10 V)

output tag address should be Example: ( QW274:p )