Safety engineering
Electrical installation
10
l
266
EDS84ASC552 EN 8.1
10.6 Electrical installation
DO1SIB
GI
SIAGO
DC 24 V
(+19.2...
+28.8 V)
X80
24O
E84ABSB002 8400HLC045
Fig. 10−2 Block diagram − safe torque off (STO)
SU Safety unit
X80 Pluggable terminal strip for the safety unit
SIA, SIB, GI Connections for shutdown paths
24O, DO1, GO Feedback connections
C Microcontroller
PWM Pulse width modulation
0 Shield connection
) Note!
For trouble−free operation of the safety unit, connect the supply cables to the
shield sheet (strain relief).
X80 Marking Description Electrical data
SIASIB GI
24O
DO1 GO
SIA Input first shutdown path SIA: I
typ
= 100 mA
GI GND potential for SIA/SIB
LOW: −3 ... 5 V,
HIGH: 15 ... 30 V
SIB Input second shutdown path SIB: I
typ
= 28 mA
Supply through safely
separated power supply unit
(SELV/PELV)
GO GND potential feedback
24 V, max. 0.7 A
short−circuit−proof
LOW−active
Supply through safely
separated power supply unit
(SELV/PELV)
24O 24−V voltage supply feedback
E84ABSB003 DO1 Non−safe signalling output: "Safe pulse
inhibit"
Terminal data
Conductor cross−section Tightening torque
[mm
2
] [AWG] [Nm] [lb−in]
Rigid
0.14 ... 1.5
26 ... 16
Spring terminal
With wire end
ferrule
0.25 ... 0.5 24 ... 20
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