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Table 6. Signal Descriptions
M12 Connector Pin
Number
BNC Connector Wire Color Signal
Description
1
3
5
—
Brown
Blue
Gray
NC
No connect. Do not connect
signals to this terminal.
2
BNC Shield
White
AI-
Negative analog input signal
and TEDS return
4
BNC Pin
Black
AI+
Positive analog input signal
and TEDS data
Notice
Adhere to ESD handling precautions when using the M12-BNC cable with
the FieldDAQ device.
Refer to The
SHM125M-BNCF Cable Safety, Environmental, and Regulatory Information
or
SHM125M-BNCF-RA Cable Safety, Environmental, and Regulatory Information
for
information about using these cables with your FieldDAQ device.
Signal Input LEDs
Each signal input connector has an LED. Refer to
information about troubleshooting open or shorted sensors.
Table 7. LED State/Status
LED State
Connector Status
Off
Excitation off
Red, solid
Open sensor or shorted sensor with excitation enabled
Green, solid
IEPE sensor connected with excitation enabled
Yellow, blinking/
alternating
User-defined status. Use MAX to write a state to any LED by
expanding
Devices and Interfaces
»
Network Devices
»
your
FieldDAQ device
»
bank of connectors in your FieldDAQ device
and configuring the LED settings on the Settings tab.
Note
When you turn off the LEDs in MAX, the FieldDAQ device controls and sets
the state of the LED. You cannot configure an LED while a task is running.
FD-11634 User Guide
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© National Instruments
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