158
L
Ø 27
Cable sheath 8,3 mm diam. (black, HFFR)
Flexible cable with 0.5 mm
2
cross-section
Vent pipe 1 mm diam. (inner diameter)
Protective cap with 4 x 3 mm diam. holes (black, PA)
+ (brown)
Vent pipe
Strength cord (white)
- (blue)
Screen
Protective cap
Cable sheath
SITRANS P, MPS Series
21
A5E00136035-04
Operating Instructions
Figure 3
Transmitter 7MF1570, dimensions
5
Connecting cables
The transmitter 7MF 1570 for measuring liquid levels (degree of protection IP68 ac-
cording to DIN EN 60 529) is connected to the junction box 7MF 1570-8AA (IP54).
The transmitter cable is connected to the terminals 1 (-), 2 (+) and earth (Figure 4).
The strength cord is clamped between the two screws in the fixture. The vent pipe
must be inside the junction box in connection with the atmosphere.
atmospheric pressure
junction
Vent pipe
box
P70
Figure 4
Transmitter 7MF1570, wiring diaphragm
The feed voltage of the transmitter may be within the range from 10 to 36 V DC. The
resistance value for the maximum load depends on the voltage U
B
. It is determined
by the following equation:
U
B
- 10 V
R
max
= ————— (kOhm)
20 mA