Banner EZ-SCREEN SLSP14-450Q88, Instruction Manual, Page: 39 / 59

Receiver
Display LED Status Possible Cause and Appropriate Action
Alignment Top
Alignment
Bottom
Status Blocked
Status Clear
Yellow flashing
Yellow OFF
Red
flashing
Green OFF
Optical Fault
• Open Reset/Test for at least 0.25 seconds and close.
• Check for optical interference or noise.
If the condition continues, contact Factory.
Alignment Top
Alignment
Bottom
Status Blocked
Status Clear
Yellow OFF
Yellow OFF
Red
flashing
Green OFF
Internal Fault
• Open Reset/Test for at least 0.25 seconds and close.
• Check the power supply for low or erratic voltage, or excessive electrical
noise.
• Verify the sensor has a good earth ground.
If the condition continues, contact Factory.
Alignment Top
Alignment
Bottom
Status Blocked
Status Clear
Yellow OFF
Yellow OFF
Red ON
Green ON Reset/Test Input Fault
• Reset/Test input open at power-up.
• Switch the device OFF, verify the Reset/Test input is connected to +24 V
dc (e.g., the reset button or switch is closed) and reapply power.
Alignment Top
Alignment
Bottom
Status Blocked
Status Clear
Yellow OFF
Yellow OFF
Red ON
Green
flashing
Test Mode - Reset/Test input is open.
Alignment Top
Alignment
Bottom
Status Blocked
Status Clear
Yellow OFF
Yellow OFF
Red OFF
Green OFF
Power Supply Failure - Check power supply.
6.3 Electrical and Optical Noise
The EZ-SCREEN Type 2 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 In very extreme electrical noise cases, a Lockout
is possible. To minimize the effects of transitory noise, the EZ-SCREEN Type 2 responds 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
• Sensor input or output wires routed too close to noisy wiring
6.3.1 Sources of Electrical Noise
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 Type 2 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 Type 2 System. It is good wiring practice (and may be required by code) to isolate EZ-SCREEN Type 2
wires from high-voltage wires.
The Banner model BT-1 Beam Tracker (see
Alignment Aids on page 52 ) is a 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 entering the
receiver lens. Press the RCV button on the BT-1 and position the Beam Tracker on the wires going to the EZ-SCREEN Type 2 or any other
nearby wires. The noise caused by switching of the inductive loads should be addressed by installing proper transient suppression
across the load.
6.3.2 Sources of Optical Noise
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 (see Alignment Aids on page 52 ) 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 emitted light from other sources (other safety
light screens, screens or points, or standard photoelectric sensors).
EZ-SCREEN
®
Type 2 Light Screen
www.bannerengineering.com - Tel: 763.544.3164 39