3-24 Receiving & Installation
MN715
Analog Inputs and Outputs The analog inputs (voltage or current) are scaled by the Level 2, Output Limits, Min and
Max Output Frequency parameter values.
Two analog inputs are available: analog input #1 (J4-1 and J4-2) and analog input #2
(J4-4 and J4-5) as shown in Figure 3-25. Either analog input #1 or #2 may be grounded
provided the common mode range is not exceeded. Either analog input may be selected
in the Level 1 INPUT block, Command Select parameter value. Analog input #1 is
selected if parameter value “Potentiometer” is selected. Analog input #2 is selected if
parameter value “ 0-10Volts, 0-5 Volts or 4-20mA” is selected.
Figure 3-25 Analog Inputs and Outputs
J4
Analog GND
Analog Input 1
Pot Reference
Analog Input +2
Analog Input -2
1
2
3
4
5
Analog Input 1
Analog Input 2
Command Pot or
0-10VDC
0-5VDC, 0-10VDC or 4-20 mA Input
See recommended terminal tightening torques in Section 6.
5K
W
Analog Input #1
The single ended analog input #1 is used when the controller is set to Standard 3 Wire,
(Single Ended)
Fan Pump 2 Wire, Fan Pump 3 Wire, Serial, Process Control, 3 SPD ANA 2Wire, 3 SPD
ANA 3Wire, EPOT-2 Wire or EPOT-3 Wire (not Keypad or 15 Speed).
The single ended analog input #1 can be used in one of three ways. Speed command
(Level 1 Input block, Command Select=Potentiometer). Process Feedback (Level 2
Process Control block, Process Feedback=Potentiometer). Setpoint Source (Level 2
Process Control block, Setpoint Source=Potentiometer).
When using Analog Input #1, the respective parameter must be set to
“POTENTIOMETER”.
Note: A potentiometer value of 5k
W
to 10k
W
, 0.5 watt may be used.
1.
Connect the wires from the 5K
W
pot at the J4 terminal strip. One end of the pot
is connected to J4-1 (analog ground) and the other end is connected to J4-3
(reference voltage).
2.
Connect the wiper of the pot to J4-2. The voltage across terminals J4-1 and
J4-2 is the speed command input.
Analog Input #2
Analog input #2 accepts a 0-5VDC, 0-10VDC or 4-20 mA command. The operating
(Differential)
mode is defined in the Level 1 Input block OPERATING MODE parameter.
Note: Analog Input #2 is used with Standard Run 3-Wire, Fan Pump 2 Wire, Fan
Pump 3 Wire, Process Control, 3 SPD ANA 2Wire, 3 SPD ANA 3Wire,
EPOT-2 Wire or EPOT-3 Wire (not Keypad, 15 Speed or Serial modes).
Note: Analog Input #2 can be connected for single ended operation by grounding
either of the inputs, provided the common mode voltage range is not
exceeded. The common mode voltage can be measured with a voltmeter.
Apply the maximum command voltage to analog input 2 (J4-4, 5). Measure
the AC and DC voltage across J4-1 to J4-4. Add the AC and DC readings
together. Measure the AC and DC voltage from J4-1 to J4-5. Add the AC and
DC readings together.
If either of these measurement totals exceeds a total of
±
15 volts, then the
common mode voltage range has been exceeded. If the common mode
voltage range has been exceeded, the solution is either to change the
command voltage source or isolate the command voltage with a commercially
available signal isolator.
