Differential Measurement Mode - Balluff BOD 26K LB04-S115-C Instructions De Service Et De Montage

Differential measurement mode

Differential measurement can only be used with LBR version of BOD 26K.
Measuring ranges can however vary.
Simultaneous connection to SPC control or a PC via the RS 485 interface is not possible with
differential measurement.
With this measuring procedure, two BOD 26K-LBR sensors are connected to one another. The measuring ranges
can overlap (1), be directly adjacent (2) or apart (3) (Illustr. 20).
To achieve optimum use of the measuring range, the measuring object should if possible be aligned in the centre of
the measuring range.
1
2
3
Illustr. 20
The following steps must be carried out for differential measurement:
1. Mount both BOD 26K-LBR sensors.
2. Connect sensors according to the electrical connection diagram
Master
Illustr. 21
3. One of the sensors must be configured as a slave. Activate function 26 (see "Settings", page 32)
38
2
+U
1
B
5
6
8
4
Q2
3
Q1
7
-U
B
+U
B
RS485 Y/A
RS485 Z/B
-U
B
No. 834826 E Edition 1111; Replaces edition 0901; Subject to modification
operating instructions
Measuring range
Slave
2
1
5
6
8
4
Q2
3
Q1
7
Mounting and