Dräger Polytron 7000 Instructions For Use Manual page 22

Electrical connections
Transmitter with pump module (3-wire):
Minimum Maximum pos-
supply voltage sible
flow-rate
20 V 0.5 L/min
1.0 L/min
24 V
1.5 L/min
28 V
Transmitter with relay and pump modules (3-wire):
Minimum Maximum pos-
supply voltage sible
flow-rate
20 V 0.5 L/min
1.0 L/min
24 V
1.5 L/min
28 V
22
Maximum cable length with a load resistance of not more than
Number of
transmitters
0.5 mm
265 pF/m
1 161 m
2 80 m
3 54 m
4 40 m
1 233 m
2 116 m
3 78 m
4 58 m
1 135 m
2 68 m
3 45 m
4 34 m
1 271 m
2 135 m
3 90 m
4 68 m
Maximum cable length with a load resistance of not more than
Number of
transmitters
0.5 mm
265 pF/m
1 110 m
2 55 m
3 37 m
4 27 m
1 161 m
2 80 m
3 54 m
4 40 m
1 90 m
2 45 m
3 30 m
4 22 m
1 179 m
2 90 m
3 60 m
4 45 m
500 Ω
2 2
0.75 mm
320 pF/m
241 m
120 m
80 m
60 m
349 m
175 m
116 m
87 m
203 m
102 m
68 m
51 m
406 m
203 m
135 m
102 m
500 Ω
2 2
0.75 mm
320 pF/m
164 m
82 m
55 m
41 m
241 m
120 m
80 m
60 m
134 m
67 m
45 m
34 m
269 m
134 m
90 m
67 m
2
1.5 mm 2.5 mm
375 pF/m 400 pF/m
482 m 792 m
241 m 401 m
161 m 268 m
120 m 201 m
699 m 792 m
349 m 582 m
233 m 388 m
175 m 291 m
406 m 586 m
203 m 338 m
135 m 226 m
102 m 169 m
812 m 792 m
406 m 677 m
271 m 451 m
203 m 338 m
2
1.5 mm 2.5 mm
375 pF/m 400 pF/m
329 m 548 m
164 m 274 m
110 m 183 m
82 m 137 m
482 m 792 m
241 m 401 m
161 m 268 m
120 m 201 m
269 m 448 m
134 m 224 m
90 m 149 m
67 m 112 m
537 m 792 m
269 m 448 m
179 m 298 m
134 m 224 m
2
2