Instructions for Use
– SCHMIDT
®
Flow Sensor SS 23.400 ATEX 3
Page 13
4 Electrical connection
Plug-in connector
The sensor features a firmly integrated plug-in connector:
Number of connection pins:
7 (plus shield connection on the metallic housing)
Type:
Male
Fixation of connecting cable:
Screw M9 (spigot nut on the cable)
Protection type:
IP67 (with screwed cable)
Model:
Binder, series 712
View at plug-in connector
of sensor
WARNING!
DO NOT DISCONNECT CONNECTING
CABLE AND SENSOR WHEN THEY ARE
UNDER VOLTAGE!
Figure 4-1
For pin assignment of the plug-in connector see Table 3.
Pin
Designation
Function
Wire color
1
Power
Operating voltage : +U
B
white
2
TXD
Do not connect
brown
3
RXD
Do not connect
green
4
OC1
Switching output 1: Direction / threshold
yellow
5
OC2
Switching output 2: Switch threshold
gray
6
Analog
Velocity signal
Pink
7
Ground
Operating voltage : Mass
Blue
Shield
Electromechanical shielding
Shield meshwork
Table 3
All signals use as electric reference the potential GND.
The cable shield is connected to the metallic housings of the plug-in con-
nector and the sensor enclosure and must be connected to an anti-inter-
ference potential, e.g. ground (depending on the shielding concept).
The wire color mentioned in Table 3 is applicable for the use of
SCHMIDT
®
cables with material Nos. 535279
10
and 565072.
The ATEX approval is valid only when using the cables of
SCHMIDT
®
mentioned above with material nos. 535279
10
and
565072.
10
Also allowed are the formerly orderable cable with material no. 505911-x (x = 1 / 2 / 3).
