Banner EZ-SCREEN­ Safety Light Curtain Systems - Manual (Page 53)

P/N 133487
51
Banner Engineering Corp. • Minneapolis, U.S.A.
www.bannerengineering.com • Tel: 763.544.3164
Overview
51
Banner Engineering Corp. • Minneapolis, U.S.A.
www.bannerengineering.com • Tel: 763.544.3164
EZ-SCREEN
Instruction Manual
Troubleshooting and Maintenance
5.3 Electrical and Optical Noise
The EZ-SCREEN is designed and manufactured to be highly
resistant to electrical and optical noise and to operate reliably
in industrial settings. However, serious electrical and/or optical
noise may cause a random Trip or Latch condition. In very
extreme electrical noise cases, a Lockout is possible. In order
to minimize the effects of transitory noise, the EZ-SCREEN
will respond to noise only if the noise is detected on multiple
consecutive scans.
If random nuisance Trips occur, check the following:
• Poor connection between the sensor and earth ground;
•
Optical interference from adjacent light screens or other
photoelectrics; or
• Sensor input or output wires routed too close to “noisy” wiring.
Checking for sources of electrical noise: It is very important
that the light screen sensors have a good earth ground. Without
this, the System can act like an antenna and random Trips and
Lockouts can occur.
All EZ-SCREEN wiring is low voltage; running these wires
alongside power wires, motor/servo wires, or other high-voltage
wiring, can inject noise into the EZ-SCREEN system. It is good
wiring practice (and may be required by code) to isolate
EZ-SCREEN wires from high-voltage wires.
The Banner model BT-1 Beam Tracker (see Section 2.4) is
a very good tool for detecting electrical noise. It can be used
to detect electrical transient spikes and surges. Cover the
lens of the BT-1 with electrical tape to block optical light from
getting into the receiver lens. Press the “RCV” button on the
BT-1 and position the Beam Tracker on the wires going to the
EZ-SCREEN or any other nearby wires. Noise caused by the
switching of inductive loads should be addressed by installing
proper transient suppression across the load.
Checking for sources of optical noise: Turn off the emitter,
completely block the emitter, or open the Test input, then use
a Banner BT-1 Beam Tracker to check for light at the receiver.
Press the “RCV” button on the BT-1 and move it across the full
length of the receiver’s sensing window. If the BT-1’s indicator
lights, check for light from other sources (other safety light
screens, screens or points, or standard photoelectric sensors) by
“tracking down” the emitted light from them.
5.4 Servicing and Maintenance
Cleaning
EZ-SCREEN emitters and receivers are constructed of
aluminum with a yellow painted finish and are rated IP65. Lens
covers are acrylic. Emitters and receivers are best cleaned
using mild detergent or window cleaner and a soft cloth. Avoid
cleaners containing alcohol, as they may damage the acrylic
lens covers.
Warranty Service
EZ-SCREEN components are designed for reliability. Do not
open the emitter or receiver housings, other than to access for
configuration. They contain no field-replaceable components.
If repair is necessary, do not attempt to repair an emitter or
receiver yourself; return the unit to the factory.
Should it become necessary to return an EZ-SCREEN
component to the factory, please do the following:
1. Contact the Banner Factory Application Engineering group at
the address or numbers listed below:
Banner Engineering Corp.,
Application Engineering Group
9714 Tenth Avenue North
Minneapolis, MN 55441
Phone: 763.544.3164 or
Toll-Free (US only): 888.373.6767
email: [email protected]
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 component(s) carefully. Damage which occurs
during return shipping is not covered by warranty.