09.02 Connection
Siemens AG 6SE7087-6AK85-1AA0
3-17
Rectifier/Regenerating Unit Operating instructions
Setting elements:
• DIP switches S1, S2: Both open: No bus termination for the RS485 interface (terminals X100-1 to X100-4)
Both closed: Bus termination for the RS485 interface active (1500Ω between
RS485P and RS485N, 3900Ω from RS485P to +5V supply, 390Ω
from RS485N to earth)
Note: Application: When using the optional operator panel OP1S at the basic device
interface SST1 (X100 or X300), DIP switches S1 and S2 must be closed.
• R135 and R136: 0Ω resistances as earth-frame (M) connection
M is connected to earth when the unit is supplied. Remove these resistances only to
avoid faults due to earth loops, i.e. if the electronics frame is connected in some other
way to earth (e.g. through signal leads or the frame terminal of the power supply unit).
If option modules are used, a further earth-frame (M) connection may have to be
removed. (please refer to the description of these modules).
Electronics terminals:
Function Terminal Connected loads/Description
Serial interface
RS485 (Bus)
X100-1
X100-2
X100-3
X100-4
X100-5
RS485P Plus line Send and receive-
RS485N Minus line line
RS485P Plus line (difference input/output)
RS485N Minus line
Signal frame
For functions see Section 4.3.6.1
Binary inputs X101-6
X101-7
X101-8
X101-9
X101-10
X101-11
X101-12
X101-13
P24S +24V power supply for external
contacts, max. load 100mA
Frame for binary signals
Frame for binary signals
Binary input 1
Binary input 2
Binary input 3
Binary input 4
Binary input 5
Low level: -0.6V - 3V or floating terminals
High level: 13V - 33V
Input current at 24V: ca. 10mA
For functions see Section 4.3.2
Analog outputs X102-14
X102-15
X102-16
Analog output resolution ±8 bits,
For functions see Section 4.3.5
Frame for analog outputs
Actual current value: 0V - ±5V corresponds to
0A - ± rated DC current
Display range: 0 - ±10V, max. 5mA load, current limited
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