Honeywell SYA14 Series, Manual

Page: 346 / 737

FF-SPS4 Series Installation Manual Introduction
For application help: call 1-800-537-6945 Honeywell
•
MICRO SWITCH Sensing and Control vii
Directives Compliance
Machine Directive 89/392 EEC
Low Voltage Directive 73/23 EEC
Electromagnetic Compatibility Directive 89/336
Control Reliability
Control Reliability means that “the device, system or interface shall be designed, constructed
and installed such that a single component failure within the device, interface or system shall
not prevent normal stopping action from taking place but shall prevent a successive machine
cycle.” (ANSI B11.19-1990, 5.5)
OSHA 29 CFR 1910.217 states that “the control system shall be constructed so that a failure
within the system does not prevent the normal stopping action from being applied to the press
when required, but does prevent initiation of a successive stroke until the failure is corrected.
The failure shall be detectable by a simple test, or indicated by the control system.”
Honeywell has developed self-checking techniques which combine control reliability with
safety. The FF-SPS4 Series perimeter devices function with dual channel redundancy and
positive self-checking monitoring. This means that a faulty component in our system will make
the safety barrier fail in a safe mode.
This design meets the requirements for Category 4 Electrosensitive Protective equipment as
described in the EN 61496-1/2 European standard. Category 4 safety products are designed
and manufactured in such a way that a single breakdown or an accumulation of failures does
not lead to the loss of the safety function when a dangerous situation arises. The safety
function is maintained on a permanent basis.