Safe Torque Off 6-11
890CS Common Bus Supply - Frames B & D; 890CD Common Bus Drive and 890SD Standalone Drive - Frames E & F
STO Technical Specification
Inputs Specification
STO A Input and STO B Input comply with IEC61131-2. Note: inputs do not have hysteresis.
Recommended input voltage for low level: 0V to +5V
Recommended input voltage for high level: +21.6V to +26.4V
Typical input threshold voltage: +10.5V
Absolute maximum input voltage: -30V to +30V
Typical input current @ 24V 9mA
Indeterminate input range: +5V to +15V. Function is undefined.
Fault detection time
3
: 2.3sec typical;
< 1.6sec will not generate a fault
> 3.0sec will generate a fault.
3
A fault is defined in this context as Channel A and Channel B inputs being in opposite logic states.
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