Johnson Controls Penn VFD68D Series Technical Bulletin page 35

4–20 mA P499 Transducer
For applications using a 4–20 mA P499A transducer (Figure 25), you must:
• set P.266 and P.267 to 0
• set the AI2 mode switch position to I (see VFD68Bxx and VFD68Cxx Drives on page 56)
• calculate and change the C x parameters based on the desired operating pressure range for the
condensing fans on your application
Figure 25: Wiring a 4–20 mA Input Signal Transducer
Table 29: Settings for Single 4–20 mA Transducer
Setting
1
P. 73
1
P.266
1
P.267
Analog Input Terminal
2
AI2 Mode Switch
1. For information on parameters, see Table 34 on page 43.
2. See Figure 19 on page 28.
Single Transducer, 4
N/A
0 (current input)
0 (4–20 mA)
AI2
I
VFD68 Variable Frequency Drives
35
–
20 mA