50
£
OPERATIONAL FEATURES
4-20 mA TEST JACKS
For all amplifier types, the BurnerLogix provides 4-20 mA test
jacks to represent the flame signal strength. The test jacks are
located on the underside of the YB module (pictured at right).
The ‘+’ jack is located next to COMMS port jack and the ‘–‘ jack
is located next to the EXP port. Use caution so as NOT to plug
the ‘–‘ jack into the EXP port. The test jacks accept standard
plugs having a diameter of 0.078” (2mm). The maximum input
impedance allowed is 100 ohms. The chart below correlates the
test jack current to the numerical value shown on the display.
FIGURE 3.
COMMS
COMMS
EXP
EXP
RUN/CHK
RUN/CHK
4
6
8
10
12
14
16
18
20
0
10
13
16
20
24
28
33
54
80
DISPLAY READING
4-20 mA TEST JACK
38 40
