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46 DMM 12BC
Description
Serial control
NOTE
This connection is for use by authorised specialist staff only!
Standard: RS-232
Use: connect to PC, firmware update, external control
Figure 9: RS232 socket
The serial control takes place using a 9 pin sub-D socket with the label "RS232". This socket
allows you to perform software updates.
The pin assignment is as follows:
Pin Function
1 N.C.
2 RxD
3 TxD
4 N.C.
5 GND
6 GND
7 N.C.
8 N.C.
9 N.C.
Earth/Ground connection
Figure 10: Phoenix terminal
A phoenix terminal connects the case with the 0 V potential of the power supply.
NOTE
Only bridge the 0 V potential with the grounding (factory setting) or connect it to the central
system ground, as otherwise the phantom power has no reference point and will not function.