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Quick Start Guide
Connecting the 4–20 mA analog signal
Cabling considerations
If possible, use individually shielded twisted pair cable, either in single pair or
multi-pair varieties. Unshielded cables may be used for short distances, provided
ambient noise and cross-talk will not adversely impact communication. The
minimum conductor size is 0.51mm diameter (#24 AWG) for cable runs less than
1,500 meters (@ 5,000 ft.) and 0.81mm diameter (#20 AWG) for longer
distances. Resistance in the loop must be 1000 ohms or less.
The 4–20 mA analog output loop signal may be powered internally or externally.
The default position of the internal/external analog power switch is in the internal
position. The user-selectable power supply switch is located on the electronics
board.
Figure 19. Field mount analog signal wiring diagram
Analog output - connect negative (-)DC to Terminal 1 and positive (+)DC to
Terminal 2. See
22
Figure 19
.
February 2014
+4–20 mA
–4–20 mA
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