Pilz PMCprotego S1 Operating Manual page 45

4 Function Description
4.3 Safety functions
Sicherheitsfunktion_SDI_Umsch
Timing diagram
v
Tolerance window
1
SS1 Activate
0
1
SS1 SIL3/Reset
0
1
SDi Neg Activate
0
1
SDi Pos Activate
0
1
Ready
0
1
STO Acknowledge
0
1
SDI Acknowledge
0
Fig. 4-10: Safety function SDI
t : Activation of safety function SDI

1
t : Once the SDI delay time has elapsed, the direction of rotation is

2
monitored
SS1 Activate: Input for safety function SS1

SS1 SIL3/Reset: Input for SIL3 and reset

SDI Pos Activate: Input for safety function SDI, clockwise rotation is

monitored
SDI Neg Activate: Input for safety function SDI, anti-clockwise rota-

tion is monitored
Ready: Output for operating status of the safety card

STO Acknowledge: Output for feedback from safety function STO

SDI Acknowledge: Output for feedback from safety function SDI

Switching the direction of rotation while safety function SDI is active
When changing the direction of the motor, please note: Monitoring of

the old direction must be deactivated first, before monitoring of the
new direction of rotation is activated! (See Case A in the illustration).
s (t)
SDI
t 1 t 2
SDI delay time
t
4-27