7-3
1
Before
Using
the
Products
2
Preparation
3
Connection
4
Setup
5
Adjustment
6
When
in
Trouble
7
Supplement
Safety input/output signal
Caution
For list of connector pin numbers, refer to P.2-22,
Signal
Symbol Pin No.
Contents
Control
mode
Safety
input 1
SF1+
4
•
Input 1 that triggers STO function. This input turns
off the upper arm drive signal of power transistor.
•
When using the function, connect this pin in a way
so that the photocoupler of this input circuit turns off
to activate STO function.
Compatible
all control
mode
SF1−
3
Safety
input 2
SF2+
6
•
Input 2 that triggers STO function. This input turns
off the lower arm drive signal of power transistor.
•
When using the function, connect this pin in a way
so that the photocoupler of this input circuit turns off
to activate STO function.
SF2−
5
Safety input 1 or 2 enables STO to operate within 5 ms, causing motor output torque to
turn off.
• Safety equipment self-diagnosis L pulse
Safety output signal from the safety controller and safety sensor may include L pulse for
self-diagnosis.
To prevent the L pulse from mis-triggering STO function, the safety input circuit has
built-in filter that removes the self-diagnosis L pulse.
Therefore, if the off period of safety input signal less than 1 ms, the safety input circuit
does not detect this “off” event.
To validate this “off” period, turn off the input signal for more than 5 ms.
Safety input
signal
Servo driver
Operate
L pulse for self-diagnosis
1 ms or shorter
5 ms or shorter
5 ms or more
STO state
7
1. Safety function
Supplement
Input & output signals
Summary of Contents for MINAS A5-series
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