Banner EZ-SCREEN­ Safety Light Curtain Systems - Manual (Page 9)

page 9
Banner Engineering Corp. • Minneapolis, MN U.S.A.
www.bannerengineering.com • Tel: 763.544.3164
System Introduction
EZ-SCREEN Grid
Instruction Manual
If trip output is selected, the OSSD outputs will turn ON after power is applied,
and the receiver passes its internal self-test/synchronization and recognizes that
all beams are clear. The trip output will also automatically reset after all
interruptions of one or more beams are cleared. If latch output is selected, the
EZ-SCREEN requires a manual reset for the OSSD outputs to turn ON, after
power is applied and all beams are clear (see Section 4.2.1).
External Device Monitoring (EDM)
This feature allows the EZ-SCREEN Grid to monitor the status of external devices,
such as MPCEs. The choices are one- or two-channel monitoring, or OFF. EDM is
used when the EZ-SCREEN Grid OSSD outputs directly control the energizing and
de-energizing of the MPCEs or other external devices; see Sections 3.7.3 and 4.1
for more information.
Remote Test Input
A pair of terminals is provided at the emitter (see Section 3.7.4) for an external
switch, typically a normally open contact held closed. Opening a switch
connected between these two terminals “turns off” the emitter, simulating an
interruption of one or more light beams. This remote test input may be useful for
EZ-SCREEN Grid system setup and to verify machine control circuit operation.
Scan Code Configuration
The emitter and receiver may be configured to one of two scan code positions (1
or 2). Scan codes enable a receiver to recognize beams only from an emitter with
the same scan code setting. This helps minimize the effects of crosstalk between
multiple emitter/receiver pairs, and allows multiple pairs to operate in close
proximity in certain situations. See Section 3.3 for proper mounting
configurations. The scan code is set using the selection switch in each sensor’s
configuration port; see Section 4.1 for more information. Both the emitter and its
corresponding receiver must be set to the identical setting.
Status Indicators
A variety of status indicators on both the system emitter and receiver are clearly
visible on each sensor’s front panel.
• Emitter: A single bi-color red/green Status indicator shows whether power
is applied, and whether the emitter is in Run mode, Test mode, or
Lockout mode. A 7-segment diagnostic display indicates specific
error or configuration conditions.
• Receiver: A bi-color red/green Beam Status indicator for each beam shows
whether that beam is aligned and clear with a strong signal, clear
but with a weak signal, or is blocked and/or misaligned. A yellow
Reset indicator shows when the system is in Run mode or is
waiting for a reset. A bi-color red/green Status indicator shows
when outputs are ON or OFF, or the system is in Lockout mode. A
7-segment diagnostic display indicates specific error or
configuration conditions.
See Section 4.3 for more information about specific indicator and diagnostic
display code meanings.