Johnson Controls Penn VFD68BBB, Технический бюллетень

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VFD68 Variable Frequency Drives
34
0–10 VDC P499 Transducer
For applications using a 0 – 10 VDC P499V transducer, you must:
• adjust the parameter values that are listed in Table 28
• ensure that the AI2 mode switch (Figure 19 on page 28) is set correctly
• calculate and change C x parameters based on the desired operating pressure range for the condensing
fans on your application
The VFD68 has the ability to control motor speed using the higher input signal value of two voltage inputs
when you configure AI1 and AI2 as the same model transducer. For the high-input signal select application
with two transducers (Figure 23 or Figure 24), use the parameter values in Table 28 and see Figure 29 on
page 40,
VFD68Bxx and VFD68Cxx Drive Basic and Advanced Parameters on page 43, and Adjusting the
Default Parameters on page 52.
Table 28: Settings for Single or Dual 0–10 VDC Transducers
Setting Single Transducer Dual Transducer, High-Signal Select
P. 73
1
1. For information on parameters, see Table 34 on page 43.
0 (0–10 V) 0 (0–10 V)
P.266
1 1 (voltage input) 1 (voltage input)
P.267
1 2 (0–10 V) 2 (0–10 V)
Analog Input Terminal AI1 or AI2 AI1 and AI2
AI2 Mode Switch
2
2. See Figure 19 on page 28.
V V
IMPORTANT: If using two input devices, both devices must be identical. Do not use input devices with
different ranges and operating characteristics.
Figure 24: Wiring 0–10 VDC Input Signal Transducers