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13 © Brüel & Kjaer Vibro GmbH/4 mm ds821 / 21.7.15 /technical specifications subject to change / C104958.001/V02
EN
4 mm displacement sensor system series ds821
User manual
| Product description
2.4
Nominal overall length of the displacement sensor system
The nominal system length (N) refers to the length of the components displacement sensor (P)
and extension cable (L). The optional extension cable is required whenever the length of the
displacement sensor is 0.5 m or 1.0 m and with the help of the additional extension cable must
be extended to the nominal system length of 5 m or 10 m.
If the displacement sensor already has the nominal system length, no additional extension
cable is required. In this case, the displacement sensor system consists only of the components
displacement sensor and driver.
Example: correct installation for a nominal length N of 5 m:
P = 0.5 m
L = 4.5 m
P+L = 5.0 m
=
N
Example of incorrect installation:
P = 0.5 m
L = 4.0 m
P+L = 4.5 m
≠ N
It should be N = 5.0 m. The nominal overall length has not been complied with.
1
Sensor
ds821-
od 130
2
3
4
-DC
COM
SIG
1
S
enso
r
ds821-
od 130
2
3
4
-DC
COM
SIG
1
Sensor
ds821-
od 130
2
3
4
-DC
COM
SIG
P
N
L
