Siemens SINAMICS DCM Operating Instructions Manual page 164

Connecting
6.9 Assignment of terminals and connectors
Cable, cable length, shield support:
The encoder cable capacitance must be recharged at each encoder edge change. The rms
value of this current is proportional to the cable length and pulse frequency, and must not
exceed the current permitted by the encoder manufacturer. A suitable cable that meets the
recommendations of the encoder manufacturer must be used, and the maximum cable
length must not be exceeded. Generally speaking, a twisted cable pair with a single pair
shield is sufficient for each track. This reduces crosstalk between the cables. Shielding all
the pairs provides protection against interference pulses. The shield should be connected to
the SINAMICS DC MASTER shield support over a large area.
Note
For connecting an incremental encoder (see also Chapter "Applications").
Terminals at the Power Interface (analog tachometer, E-STOP, relay for line contactor)
Table 6- 30 Terminals XR1, XS1, XT1
Terminal Function
Analog tachometer
XT1-103 Tachometer connection
8 to 270 V
XT1-104 Ground, analog M
Safety shutdown E-STOP
XS1-105 Input (switch)
XS1-106 Supply (output)
Potential-free relay output
XR1-109 Relay for line contactor
XR1-110
Module C98043-A7105/A7107, Power Interface 400 - 600 V or
C98043-A7106/A7108 , Power Interface 690 - 950 V
162
Technical specifications
±270 V
Input resistance 159 kΩ
Resolution ±14 bits
Ie = 20 mA
24 V DC, max. load 50 mA, short-circuit proof
Current carrying capacity:
≤ 250 V AC, 4 A; cosφ = 1
≤ 250 V AC, 2 A; cosφ = 0.4
≤ 30 V DC, 2 A
External protection:
max. 4 A, characteristic C recommended
Units that have option L05 (with Power Interface A98043-
A7107/A7108) require external protection with max. 6.3 A.
Operating Instructions, 1.2012, C98130-A7066-A1-05-7619
SINAMICS DCM DC Converter