Dwyer Instruments MTL7700 Series - Page 22

18
INM7700-6 Jan 2010
Hazardous
Area
Safe
Area
3
4
1
2
MTL7728+
0V
+26V
P
I
Figure A9: Analogue output
Hazardous
Area
Safe
Area
3
4
1
2
+7V
3
4
1
2
MTL7761ac
MTL7764ac
3
4
1
2
MTL7761ac
--7V
0V
Output (mV)
Sense
+
—
Figure A13: Strain-gauge bridges
Hazardous
Area
Safe
Area
3
4
1
2
MTL7745
5
6
620Ω
10kΩ
+22.9 - 30V
LFD
COM
CH 1
Power Bus
Figure A10: Single channel switch/proximity input with Line
Fault Detect
Hazardous
Area
Safe
Area
3
4
1
2
MTL7789+
7
8
5
6
Power +26V
Power +26V
Power Bus
Figure A11: Low power digital outputs
Hazardous
Area
Safe
Area
3
4
1
2
MTL7741
5
6
7
8
NO
COM
Power Bus
22.9V - 30V
NC
Figure A12: Single channel switch/proximity input with cutout
relay