Banner EZ-SCREEN SLS, Instruction Manual

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May 22, 2023
EZ-SCREEN SLS Safety Light Curtain Instruction Manual
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The E-stop switch must provide two contact pairs, which are closed when the switch is in the armed position. Once activated,
the E-stop switch must open its contacts and return to the closed-contact position only after deliberate action (such as twist-
ing, pulling, or unlocking).
The switch should be a positive-opening type, as described by IEC947-5-1. A mechanical force applied to such a button (or
switch) is transmitted directly to the contacts, forcing them open. This ensures that the switch contacts open when the switch
is activated.
NFPA 79 specifies the following additional requirements:
Emergency Stop push buttons shall be located at each operator control station and at other operating stations where
emergency shutdown shall be required.
Stop and Emergency Stop push buttons shall be continuously operable from all control and operating stations where
located.
Actuators of Emergency Stop devices shall be colored red. The background immediately around the device actuator
shall be colored yellow. The actuator of a push-button-operated device shall be of the palm or mushroom-head type.
The Emergency Stop actuator shall be a self-latching type.
Some applications may have additional requirements. The user must comply with all relevant regulations.
WARNING: Connecting multiple e-stop switches
When two or more e-stop switches are connected to the same EZ-SCREEN SLS receiver, the
contacts of the e-stop switches must be connected together in series. This series combination is
then wired to the respective EZ-SCREEN SLS receiver input.
Never connect the contacts of multiple e-stop switches in parallel to the EZ-SCREEN SLS inputs;
this defeats the switch contact monitoring ability of the EZ-SCREEN SLS light curtain, and creates
an unsafe condition which could result in serious bodily injury or death.
Also, when two or more e-stop switches are used, each switch must be individually actuated (en-
gaged), then re-armed and the
EZ-SCREEN SLS light curtain reset (if using latch mode). This al-
lows the monitoring circuits to check each switch and its wiring to detect faults. Failure to test each
switch individually in this manner could result in undetected faults and create an unsafe condition
which could result in serious bodily injury or death.
WARNING:
Reset Routine Required
Allowing the machine to restart as soon as the e-stop switch is armed creates an unsafe condition
that could result in serious injury or death.
U.S. and international standards require that a reset routine be performed after returning the e-
stop switch to its closed-contact position (when arming the e-stop switch). When automatic reset is
used, establish an alternate means to require a reset routine after the e-stop switch is armed.
The Cascade input may be used to monitor interlock safety gates or guards. Requirements vary widely for the level of control
reliability or safety category (per ISO 13849-1) in the application of interlocked guards. While Banner Engineering recom-
mends the highest level of safety in any application, the user is responsible to safely install, operate, and maintain each safe-
ty system, and comply with all relevant laws and regulations. Of the following applications,
"Positive-Opening Interlocking
Safety Switches " on page 81 meets or exceeds the requirements for OSHA/ANSI control reliability and Safety Category 4,
per ISO 13849-1.
E-Stop Switch Requirements (Positive-Opening)
8.7.1
Interlock Switches in Cascaded Systems
8.8
© Banner Engineering Corp.