Banner EZ-SCREEN­ Safety Light Curtain Systems - Manual (Page 36)

34
P/N 133487
Banner Engineering Corp. • Minneapolis, U.S.A.
www.bannerengineering.com • Tel: 763.544.3164
Overview
34
Banner Engineering Corp. • Minneapolis, U.S.A.
www.bannerengineering.com • Tel: 763.544.3164
EZ-SCREEN
Instruction Manual
Installation and Alignment
3.5 Electrical Interface to the Guarded Machine
Permanent Hookup
Make the electrical connections as described in Sections 3.5.1 to
3.5.4 as required by each individual application.
Lockout/tagout procedures may be required (refer to OSHA
1910.147, ANSI Z244-1, or the appropriate standard for
controlling hazardous energy). Follow relevant electrical
standards and wiring codes, such as the NEC, NFPA79 or IEC
60204-1. See the warning in Section 3.3.
Supply power and the external reset switch should already be
connected. The EZ-SCREEN must also have been aligned and
passed the Initial Checkout, as described in Section 3.4.
The final connections to be made are:
• OSSD outputs
• FSD interfacing
• MPCE/EDM connections
• Optional remote Test
WARNING . . .
Interfacing of Both OSSDs
Both of the OSSD (Output Signal Switching Device) outputs
must be connected to the machine control so that the machine’s
safety-related control system interrupts the circuit to the machine
primary control element(s), resulting in a non-hazardous condition.
Never wire an intermediate device(s) (e.g., PLC, PES, PC)
that can fail in such a manner that there is the loss of the
safety stop command, OR in such a manner that the safety
function can be suspended, overridden, or defeated, unless
accomplished with the same or greater degree of safety.
WARNING . . .
OSSD Interfacing
To ensure proper operation, the EZ-SCREEN OSSD output
parameters and machine input parameters must be considered
when interfacing the EZ-SCREEN solid-state OSSD outputs to
machine inputs.
Machine control circuitry must be designed so that the maximum
load resistance value is not exceeded and that the maximum
specified OSSD OFF-state voltage does not result in an
ON condition.
Failure to properly interface the OSSD outputs to the guarded
machine could result in serious bodily injury or death.
WARNING . . .
Shock Hazard
Always disconnect all power from the EZ-SCREEN System
and the guarded machine before making any connections or
replacing any component. Use extreme caution to avoid electrical
shock at all times.
WARNING . . .
If Trip Test Indicates a
Problem
If the EZ-SCREEN System does not respond properly to the
trip test, do not attempt to use the System.
If this occurs, the EZ-SCREEN cannot be relied on to stop
dangerous machine motion when a person or object enters the
defined area.
Serious bodily injury or death could result.
If all Zone indicators turn Green or fail to follow the position
of the test piece while it is within the defined area, the
installation has failed the trip test. Check for correct sensor
orientation, reflective surfaces and unguarded areas created
due to the use of Blanking. Do not continue until the situation is
corrected.
When the test piece is removed from the defined area, in Trip
Output Operation, the Status indicator must turn ON Green (or
flash Green, if Reduced Resolution is enabled). In Latch Output
Operation, the Status indicator will remain Red until a manual
reset is performed (the Yellow Reset indicator will be flashing).
If mirrors are used in the application: Test the defined area
on each leg of the sensing path (e.g. emitter to mirror, between
mirror and receiver, see Figure 3-15).
If the EZ-SCREEN System passes all three checks during the
trip test, go on to Section 3.5.