Control Via Terminals On The Control Unit And The Power Unit - Siemens Sinumerik 840D sl Function Manual

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4.6 Control via terminals on the Control Unit and the power
unit
Features
S Only for the STO, SS1 (time--controlled) and SBC functions
S Dual--channel structure via two digital inputs (Control Unit / power unit).
S The signals of the components connected at the terminals (pushbuttons,
switches, ...) can be debounced in order to prevent false tripping due to signal
disturbances or non--symmetrical test signals. The filter times are set via para-
meters p9651 and p9851.
S Different terminal strips depending on design
S Automatic ANDing of up to 8 digital inputs (p9620[0...]) on the Control Unit with
parallel configuration of power units in chassis format is not possible.
Terminals for STO, SS1 (time- -controlled), SBC
The functions are separately selected/deselected for each drive using two termi-
nals.
S 1. Control Unit shutdown path
The required input terminal for Safe Torque Off (STO) is selected via the BICO
interconnection (BI: p9620[0]).
Digital input DI 0 ... DI 7 on the Control Unit can be used as a signal source
(NCU). NX modules have DI 0 to DI 3.
S 2. Motor Module shutdown path
The input terminal is the "EP" ("Enable Pulses") terminal.
The EP terminal is periodically interrogated with a sampling time, which is roun-
ded off to an integer multiple of the current controller cycle; however, it is a
minimum of 1 ms.
(Example: t
Both terminals must be energized simultaneously within the discrepancy time
p9650/p9850, otherwise a fault will be issued.
© Siemens AG 2015 All Rights Reserved
SINUMERIK 840D sl/SINAMICS S120 SINUMERIK Safety Integrated (FBSI sl) - - 10.2015 Edition

4.6 Control via terminals on the Control Unit and the power unit

= 400 μs, t => 3x, t
i EP i
Safety Functions integrated in the drive
= 1.2 ms)
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