meteocontrol Power Control Operating Manual page 66

Element
(15)
(16)
(17)
11.1.1.1 Potentials and bridge assignment
The potential terminals in blocks I, II and III can be assigned differently
depending on the wiring. If the IO blocks are to be operated on the same
potential as the PCU, the following wiring must be observed:
•
•
Block I
•
•
Block II
•
•
Block III
Notice
If connected incorrectly, the device may be damaged.
–
•
•
Note:
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Protect
RS232
+ -24V
+24V: Terminals 1 and 14 have the same potential
GND: Terminals 13, 26 and 39 have the same potential
+ 24V: (terminal 1) with +IO1 (terminal 2)
GND: (terminal 13) with -IO1 (terminal 12)
+ 24V: (terminal 14) with +IO2 (terminal 15)
GND: (terminal 26) with -IO2 (terminal 25)
Observe precise clamping.
GND: (terminals 1 or 14) with +IO3 (terminal 28)
GND: (terminal 39) with -IO3 (terminal 38)
If the potentials of RCR and CPU are to be disconnected, the
potentials of the connection blocks (+/-IOx) may not be
bridged with the PCU potential. In potential-free operation,
the plus and mass potential of the RCR on +/-IO of the
relevant connection block are required to ensure a safe
identification of the signals.
Meaning
Write protect slide switch
Interface for communication with the
main computer (IEC)
DC voltage supply
meteocontrol Power Control 03082012 - en