09.02  Options 
Siemens AG    6SE7087-6AK85-1AA0 
9-7 
Rectifier/Regenerating Unit    Operating Instructions 
9.6.2 Installation 
•  Undo the fixing screws 
a of the CUR (A10) above and below the 
removal handles 
s. 
•  Remove the module carefully from the electronics box using the 
handles 
s. 
•  Versions 1 and 2: Module PTP1 is a submodule 
d of the CUR. The 
PTP1 is fitted to the electronics module using the preassembled 
spacers. The female rods X115 and X116 must be fitted onto the 
corresponding male pins on the CUR. 
•  Version 3: The PTP1 and EPROM are already fitted to the CUR. 
•  Slide CUR module (A10) with PTP1 (A2) into the electronics box 
carefully along the guide rails as far as the stop. 
•  Screw the module into position with the fixing screws 
a above and 
below the removal handles 
s. 
X100
X101
X102
PMU
X104
X117
X115
X116
A10
CUR
c
d
c
d
 
 
9.6.3  Function and terminal description 
See circuit diagram in Section 3.5 "Single-line diagrams with suggested circuit arrangements". 
Function  Terminal  Connected values / Description 
RS485 serial interface  X117-1  RS485R +  receive cable RS485 positive 
(SST2)  X117-2  RS485R - receive cable RS485 negative 
  X117-3  RS485T+  send cable RS485 positive 
  X117-4  RS485T- send cable RS485 negative 
 X117-5 Signal earth 
The bus termination resistors required for peer-to-peer mode are installed on the module: 
• 150Ω between terminal X117-1 and terminal X117-2 
• 390Ω from terminal X117-1 to +5V supply 
• 390Ω from terminal X117-2 to ground 
 
9.6.4 Parameterization 
The following parameters influence the function of the SST2 interface for the basic unit (for details see Section 
5.12): 
P681 (i001 to i005)  Selection of process data for transmission 
P684.i003 Baudrate 
P686.i003  Number of net data words for peer-to-peer link 
P687.i003  Telegram failure time 
P688  Selection of the protocol 
Parameterization for "12-pulse mode" see Section 3.8.3. 
AoteWell Automation Sales Team
Buy Siemens PLC HMI Drives at AoteWell.com