Table 4. Error Status of E1 and E2 LEDs
Error
E1 LED
E2 LED
No error
Off
Off
Underrange
Off
On
Overrange
Off
On
Supply voltage faulty (supply for analog modules U
A
)
On
On
Parameter table invalid
Off
On
Device error
Off
On
Flash format error
Off
On
Note
The reported error depends on the measuring range. For information about
input scaling, refer to the device datasheet on
ni.com/manuals
.
Connecting the REM-11100
Figure 4. REM-11100 Voltage Measurement Connection
24 VDC
AI+ (0:3)
AI– (0:3)
U
IS
(0:3)
GND
24 VDC
Sensor
GND
x4
REM-11100
+
–
+
–
a1
a2
b1
b2
U
IS
and GND are optional, sensor-dependent connections.
Note
For information about fuse ratings for the REM-11100, refer to the device
datasheet on
ni.com/manuals
.
Connection Guidelines
•
Always connect analog signals using shielded, twisted pair cables. Unshielded cables
may lead to values outside the specified tolerance limits in environments subject to heavy
noise.
•
Connect the cable shield to functional earth ground immediately after the cables enter the
control cabinet.
•
Connect the cable shield to a shield bus if you are not using a closed control cabinet.
REM-11100 Getting Started Guide
|
© National Instruments
|
9
