NSH5-232CW-3M Omron, NSH5-232CW-3M Datasheet - Page 58
NSH5-232CW-3M
Manufacturer Part Number
NSH5-232CW-3M
Description
HMI
Manufacturer
Omron
Datasheet
1.NSH5-232UL-3M.pdf
(122 pages)
Specifications of NSH5-232CW-3M
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
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Enabling Switch
3-3
3-3-1
External Connection
Diagram
36
Enabling Switch
Overview
In contrast to the emergency stop switch, which lets a worker intentionally
stop the machine in case of an emergency, the enabling switch makes it eas-
ier to avoid danger with no conscious decision by a worker. When work is
required in hazardous areas, e.g, during maintenance, devices with enabling
switches provide an important safety measure by preventing unexpected
operations from occurring while work is underway in the those areas.
Manual operation of devices is permitted while the enabling switch is lightly
pressed. At soon as a hazardous situation arises, however, operation is
stopped if the worker instinctively either lets go of the enabling switch or
grasps it more tightly.
Some standards, such as the ANSI/RIA R15.06 and CSA/Z434-03 Industrial
Robot Standards and the ANSI/B11.19 Machine Tool Standards, require the
use of enabling switches. In EN 60204-1, enabling switches are not required
but are recommended as auxiliary devices.
The status of the enabling switch’s DPST-NO contact is output externally
using a hard-wired output from the Special Cable.
Enabling switch
Enabling switch
DPST-NO
ENB1
NSH5
ENB2
ON
OFF
Hard-wired DPST-NO contact (3-position)
Ordinary pressure:
Turns ON
ENB1A1
ENB2A1
ENB2A2
ENB1A2
Special Cable
Pressed in:
Turns OFF
Pressure
Safety
circuit
Section 3-3
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