Johnson Controls VFD66 Drive User Manual page 20

Figure 4-8 Wiring C450CPN control module or C450CQN control module to VFD66
Terminal Block TB1
C450CPN C450CQN
Control module Control module
one analog output two analog outputs
TB1 TB1
1 2 3 4 1 2 3 4
The VFD66 controls work with most 0 to 5Vdc or 0 to 10Vdc electronic pressure
transducers. For best results, use 0 to 5Vdc, ratiometric P499 Electronic Pressure
Transducers. Ratiometric transducers vary the signal voltage from 10 to 90% of the 5Vdc
supply power as the pressure goes from minimum to maximum of the transducer rating.
Applications using a 0 to 10 Vdc transducer must be powered separately.
NOTE
4.4.3 Wiring an external alarm to a VFD66 control
The Metal Oxide Silicon Field Effect Transistor (MOSFET) alarm output activates when
a permanent fault condition occurs. See Figure 4-9 below.
Figure 4-9 Wiring the alarm output
VFD66 Control
Terminal Block TB1
A B
Visual
or Audible
External Alarm
24Vac / 30 Vdc
Device
Alarm output
is rated for 100mA
at 30Vdc / 24Vac
Wiring the VFD66 input and output power
Select a wire size for field wiring based on a wire insulation temperature resistance
° °
rating of 75 C (167 F), with a maximum wire size of 12 AWG. Use only stranded copper
wire, rated for at least 600 volts.
20
VFD66 User Guide
www.johnsoncontrols.com Issue Number: 2