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Application examples
7.5.3 Interface 21X1 assignment: Safe Torque OFF (STO)
▶
Assign the mating connector (optionally available, see chapter 17.4 "Accessories")
as interface to the superior machine control in accordance with the following
description of the unit-side connector:
Table 42: Interface 21X1 assignment on the hydraulic power unit
Pin
1
2
3
2
1
4
8
3
7
5
4
6
5
(Connector)
6
M 12x1; 8-pole
7
A - coded
8
The Safe Torque Off interface must be integrated into the safety concept of the
machine. If STO is activated, the torque of the servodrive is disengaged and the
CytroBox is thus depressurized.
Further information on the connection possibilities is provided in the application
description "Rexroth IndraDrive, integrated safety technology "Safe Torque Off"
(from Mpx-16)", see chapter 1.2 "Required and amending documentation".
STO function
Fig. 18: With two-channel wiring and passive safety unit
The dynamization signals can be freely assigned.
Function
Input channel 2
0 V power supply (SI_Ch2)
Input channel 1
+24 V power supply ±20 %/0.7 A (SI_Ch1)
Output channel 2 (Dyn_Ch2)
Output channel 1 (Dyn_Ch1)
Not used
Not used
CytroBox, RE 51057-B/11.19, Bosch Rexroth AG
Assembly 67/128
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