820-0003
IPES IR3 Flame Detector
Operating Manual
Page
20
of
37
IPES
‐
IR3 3 Wire +4 to 20 mA Current Loop Wiring Diagram
When using the current loop method of connection the circuit is a point
‐
to
‐
point
connection between a single IPES
‐
IR3 and a threshold detection device. In most cases the
threshold device will provide the 24VDC power and will operate in a closed loop. Refer to
Appendix C for interpretation of
+4 to 20ma indications.
If 24VDC is from a common source, use of a connection bus
‐
block is recommended
to provide connect/disconnect capability without disruption to any other devices
using the same power source.
Figure 6-3: IPES-IR3 Connection to 4 to 20 mA Current Loop
Connection to Digital RS
‐
485 Circuit
Figure 6-4: IPES-IR3 Connection to Digital RS-485 Circuit
