25
Electrical installation
9.2.3. Connection diagram
with 2-wire proximity switches
(inductive NAMUR limit switches)
Terminal Configu-
ration
External circuit
1
INI Top +
NAMUR-
Sensor
Explosion
protected area
Non-hazardous
area
+8,2 V DC
0 V
R
1 / 3
2 / 4
3)
2
INI Top -
3
INI Bottom
+
4
INI Bottom -
5
Valve control
+
5
6
PA
Explosion
protected area
Non-hazardous
area
+
Safety barrier
4)
6
Valve control
GND
Tab. 4: Connection diagram with 2-wire proximity switches
3)
(Recommended by NAMUR) Observe the max. values of the
intrinsically safe circuits in the ATEX additional instructions.
4)
Signal from barrier see PTB 07 ATEX 2048
Screw terminals
1
2
3
Terminal
No
4
5
6
Fig. 22: Position of the screw terminals
9.2.4. Connection diagram with 2-wire
proximity switches 24 V (inductive limit
switches, normally open)
Terminal Configuration
External circuit
1
INI Top +
+
–
load
1 / 3
2 / 4
2
INI Top -
3
INI
4
INI Bottom -
5
Valve c
5
6
6
Valve control GND
Tab. 5: Connection diagram with 2-wire proximity switches 24 V
english
Type 8697
Summary of Contents for 8697
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