Complete Product Catalog - Norman Equipment Co.

FWS 1206
Fail-To-Safe Standstill Monitors
Features
• Confirmation of standstill using 1 or 2
impulse sensors
• Uses additional standstill signal, e.g. PLC
as second input channel
• PL d per EN ISO 13849-1, Control Category
3 to EN 954-1
• Operational voltage 24 VDC
• Reset input
• 2 short-circuit proof semiconductor outputs
• Integral System Diagnostics (ISD)
• 2 channel microprocessor control
• Customer-specific standstill frequencies
possible
• 2 enabling paths
Dimensions
22.5 x 75 x 110 mm
ISD
The following faults are recognized by the safety
controller and indicated by means of ISD
• Interruption of the connections to one of the
inductive proximity switches
• Failure of the proximity switches
• Failure of one channel being evaluated
• Failure of the unit’s internal safety relay to pull-in or
drop-out
• Faults on input or relay control circuits of the safety
controller
Model
Designation
FWS 1206A-24VDC (Execution A)
FWS 1206C-24VDC (Execution C)
Standstill
Frequencies
Execution A
Execution C
Function
Table
Additional
transistor output Y
Function of
output Y
Input X1 1Hz 1Hz
Input X2 2Hz 1Hz
Y1
Y2
Enable, Enabling
circuits closed
Fault, high signal
Approvals BG UL CSA
372