SME312D BANNER ENGINEERING, SME312D Datasheet - Page 4

• Manufacturer Part Number: SME312D
• Description: Photoelectric Sensor
• Manufacturer: BANNER ENGINEERING

Specifications of SME312D

• Output Current: 150mA
• Sensor Output: NPN/PNP
• Supply Voltage Range Dc: 10V To 30V
• Sensor Input: Optical
• Output Type: Transistor
• Sensing Range Max: 380mm
• Contact Current Max: 150mA
• Switch Terminals: Cable

a relative indication of sensing contrast between the light and dark conditions.
Remote Configuration
The remote function may be used to configure the sensor remotely or to disable the
push button for security. Connect the gray wire of the sensor to ground (0V dc), with a
remote programming switch connected between them. Pulse the remote line according to
the diagrams in the configuration procedures. The length of the individual programming
pulses is equal to the value T:
Troubleshooting
The MINI-BEAM Expert’s Power LED may begin to alternate flashing red/green; this
indicates a microprocessor memory error. If it occurs, try reteaching the sensor, or
try cycling power ON and OFF, then reteaching the sensor. If this does not solve the
problem, or if it occurs frequently, replace the sensor.
Status Indicators
Normal sensor operation is called RUN mode. Sensor configuration (setting the sensitivity
threshold and selecting output ON and OFF conditions) is performed in TEACH mode.
The two LED indicators (bi-color Green/Red and Yellow) have distinct roles in the two
operation modes, as shown in Figure 2.
If contrast is marginal, the bi-color indicator will flash green to indicate instability. If this
occurs, reconfigure or realign the sensor, or clean the sensor or fiber lenses.
The Signal Strength indicator is Banner’s exclusive AID™ (Alignment Indicating
Device). Its pulse rate increases as the received light signal strength increases (during
programming). This feature simplifies accurate alignment during TEACH mode, and gives
Figure 2. Status Indicator Conditions
MINI-BEAM

** The faster the pulse rate, the stronger the light signal.
* This is the Stability indicator, which signals when maintenance, realignment, or reconfiguration is needed
during RUN mode.
P/N 55214 rev. E
ON Green: Power is ON
Flashing Green: Sensed light level is
ON: Outputs conducting
OFF: Outputs not conducting
®
RUN Mode
approaching sensing
threshold*
0.0 seconds ≤ “T” ≤ 0.8 seconds
Expert
™
Series
ON Red: Sensor “sees” its own modulated
ON: Ready to TEACH output ON condition
OFF: Ready to TEACH output OFF
condition
light source; pulse rate is
proportional to the received light
signal strength**
TEACH Mode
Banner Engineering Corp. • Minneapolis, MN U.S.A.
www.bannerengineering.com • Tel: [phone]