OI_EC2-XC645CX_A1_A2L_A3_EN_Rev01_866933.docx EC2-XC645CX 9/54
5.3 Probe connection
General warnings
If using terminal ends be sure there are no bear parts which could cause short circuiting or
introduce noise disturbance at high frequencies. To minimize the induced disturbances, use
shielded cables with the shield connected to earth.
Pressure probe (4 - 20 mA): respect the polarity. If using terminal ends be sure there are no
bear parts which could cause short circuiting or introduce noise disturbance at high frequencies.
To minimize the induced disturbances, use shielded cables with the shield connected to earth.
Temperature probe: it is recommended to place the temperature probe away from direct air
streams to correctly measure the temperature.
Probe wirings
Low voltage side (14 PINs connector): Keep the cables away from the power cables. Use shielded
cable to lengthen the cables.
NOTE1: The PIN 4 is the common line for the temperature probes.
NOTE2: The PIN 6 gives a 12VDC supply for the 4-20 mA pressure transducers.
PP07 PP11, PP30, PP50 4 - 20 mA pressure
transducers respect the polarity.
Suction (P1C = Cur)
Brown (+) to terminal 6; white (-) to
terminal 5
Condenser (P2C = Cur)
Brown (+) to terminal 6; white (-) to
terminal 7
Temperature probes (NTC 10 K)
Suction: 4 - 5 (P1C = NTC)
Condenser: 4 - 7 (P2C = NTC)
Pb3: (P3C = NTC): 4 - 3
Pb4: (P4C = Nt10) 27 - 28
Ratiometric transducers (0.5 - 4.5 VDC)
Suction (P1C = 0-5)
5 (In); 4(+); 10 (gnd)
Condenser (P2C = 0-5)
7 (In); 4(+); 10 (gnd)
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