Parker HAS Series - Pulse Inputs

Parker Hannifin Corporation
Cylinder Division
Des Plaines, Illinois
www.parker.com/cylinder
Hydraulic and Electrohydraulic Actuators
HAS Series Analog Drives Manual
Catalog HY08-4005-M3
60
WARNING: This product can expose you to chemicals including Lead and Lead Compounds which are known to the State of
California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov
PROP 65 WARNING
Safe Torque Off
Some safety equipment, e.g. safety PLCs, regularly pulse the two STO inputs independently in
order to detect a short circuit between them. This is commonly known as OSSD (Output Signal
Switch Device). The 890STO inputs are immune to such pulses when these are less than 2ms in
width. The product will not react to such pulses and therefore will not inadvertently invoke the STO
function.
States:
1
2
Both inputs are low. STO prevents the drive from starting. User output is ON. This is the
“safe torque off” state of the drive.
Both inputs are high, but regularly pulse low independently. External equipment can thus
detect a short circuit between the two STO user inputs. Each input must remain low for 6ms
(typical) before the 890 reacts to it.
2 1
<2ms <2ms typ 6ms
Channel A: X11/01
Channel B: X11/03
O utput: X11/05, X11/06
STATE
24V
0V
24V
0V
ON
OFF
Hybrid Actuation System
Cylinders SSeerriieess HHAASS 550000
Catalog HY08-
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Cylinder Division
Des Plaines, Illinois
60
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Pulse Inputs