Banner SI-HG63 Hinge Style Switches - Manual (Page 5)

Machine Safety Switches –
SI-LS31H Series
P/N 50165 rev. D
Banner Engineering Corp. • Minneapolis, MN U.S.A.
www.bannerengineering.com • Tel: 763.544.3164
Use only a positively driven, normally closed safety contact from each switch for
connection to the safety module. The normally open contact may be used for control
functions that are not safety-related. A typical use is to communicate with a process
controller. Refer to the installation instructions provided with the safety modules for more
information regarding the interface of the safety module to the machine stop control
elements.
Periodic Checks
Safety switches should be checked at each shift change or machine setup by a
designated person (see below) for:
1. Breakage of the switch body or actuator,
2. Good alignment and full engagement of the actuator with the receptor,
3. Confirmation that the safety switch is not being used as an end stop,
4. Loosening of the switch or actuator mounting hardware, and
5. Verification that it is not possible to reach any hazard point through an opened guard
(or any opening) before hazardous machine motion has completely stopped.
In addition, a qualified person should check for the following on a periodic schedule
determined by the user based upon the severity of the operating environment and the
frequency of switch actuations:
1. Check the wiring chamber for signs of contamination.
2. Check the contacts for signs of deterioration or damage.
3. Inspect the electrical wiring for continuity and damage.
4. Verify that wiring conforms to the instructions on pages 4 and 5 of this data sheet.
A designated person is identified in writing by the employer as being appropriately trained
to perform a specified checkout procedure. A qualified person possesses a recognized
degree or certificate or has extensive knowledge, training, and experience to be able to
solve problems relating to the safety switch installation (ANSI B30.2).
Repairs
Do not attempt any repairs to the switch. It contains no field-replaceable
components. Return the switch to the factory for warranty repair or replacement.
If it ever becomes necessary to return a switch to the factory, please do the following:
1. Contact the Banner applications engineering department at the number or address
listed on the front cover. They will attempt to troubleshoot the system from your
description of the problem. If they conclude that a component is defective, they will
issue an RMA (Return Merchandise Authorization) number for your paperwork, and
give you the proper shipping address.
2. Pack the switch carefully. Damage which occurs in shipping is not covered by
warranty.
WARNING . . .
It must not be possible for
personnel to reach any hazard
point through an opened guard (or any
opening) before hazardous machine motion
has completely stopped. Please reference
OSHA CFR 1910.217 and ANSI B11 standards
(see page 2) for information on determining
safety distances and safe opening sizes for
your guarding devices.
CAUTION . . .
Electrical Installation
Two safety switches must be
used for each interlock guard to achieve
control reliability or Safety Category (per
ISO 1389-1, EN 9-1) of a machine stop
circuit. Use of only one safety switch per
interlock guard is not recommended.
In addition, normally-closed safety contacts
from each of the two safety switches should be
connected to the two separate inputs of a
2-channel safety module or safety interface,
as illustrated in Figure 6. This is required to
provide monitoring for safety switch contact
failure, and to provide the necessary reset
routine, as required by IEC 60204-1 and
NFPA 79 machine safety standards.
WARNING . . .
Series
Connection of Safety
Interlock Switches
Monitoring multiple guards with a series
connection of multiple safety interlock
switches is not a Safety Category
Application (per ISO 1389-1, EN 9-1).
A single failure may be masked or not
detected at all. When such a configuration
is used, procedures must be performed
regularly to verify proper operation of each
switch.