Siemens SINAMICS S150 - Page 140

Controlling the safety functions
7.3 Control of "STO" and "SS1" via terminals on the Control Unit and the Motor/Power Module
Safety Integrated
140 Function Manual, 05/2010, A5E03264275A
Terminals for STO, SS1 (time-controlled), SBC
The functions are separately selected/deselected for each drive using two terminals.
1. Switch-off signal path, Control Unit
The desired input terminal is selected via BICO interconnection (BI: p9620[0]).
2. Switch-off signal path Motor Module/Power Module
The input terminal is the "EP" terminal ("Enable Pulses")
The EP terminal is periodically interrogated with a sampling time, which is rounded off to
an integer multiple of the current controller cycle; however, it is a minimum of 1 ms.
(example: t
i
= 400 µs, t
EP
=> 3 x t
i
= 1.2 ms)
Both terminals must be operated simultaneously, otherwise a fault will be issued.
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Figure 7-4 Example: Terminals for "Safe Torque Off", example for Motor Modules booksize and CU320-2 DP