Infranor GD1-400/05, Installation Manual

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54
GD1 – Installation Guide
Part 3 - Appendix
2.2.2
– STO CONNECTION
X2 N° SIGNAL FUNCTION DESCRIPTION
7 IN7 STO1 Channel 1 for the STO function inhibition
24 Vdc releases the enabling
6 IN6 STO2 Channel 2 for the STO function inhibition
24 Vdc releases the enabling
16 0 V internal GND internal
20 0 V external GND external
Voltage reference of the STO1 and 2 inputs.
0 V internal and 0 V external must be connected
together.
25 STO_OUT- STO_OUT-
26 NC dry contact for the display of the STO1 input state.
24 Vdc – 2 A
During the installation, take care to avoid proximity between any STO signal and high potential.
2.2.3 – TIMINGS
The STO function is based on forcibly guided relay technology. Its response time is given by the typical Operate
Time/Release Time of the relay: 12 ms / 20 ms.
Refer to the following chronogram for more detailed explanation:
The STO function has two feedbacks: the "STO_OUT" contact and detailed state available in object 0x3001. Only
the output "STO_OUT" is a safe output. An incoherent state detected between inputs STO1 and STO2 leads to a
fault state.
Used alone, the STO function corresponds to an uncontrolled stop in accordance with stop category 0 of the
EN60204-1 standard. So, this function is suitable for machines with low inertia or high resistive torque.
STO_OUT
t
≤
50ms t
≤
50ms
t
>
50ms
20ms
12ms
Ready Safe
Ready Safe
Fault state
STO1
STO2
Drive
state
Close
Open