Rockwell Automation 1333 Drive, 3/4-5HP, 230-575V Series D - Manual (Page 39)

Installation and Wiring
Chapter 4
4-22
!
ATTENTION: Unexpected machine acceleration can cause injury
or death.
If Parameter 9 is set to a value other than 0, a loss of the
potentiometer low reference signal at terminal 3 of the drive
terminal block will allow the drive to immediately accelerate to
maximum frequency if the drive is running or a start command has
been received.
Ensure that remote potentiometer connection integrity is
maintained and inspected in accordance with NFPA 70B standards
for maintenance of electrical equipment.
!
ATTENTION: Terminals 4, 5 and 6 are internally protected from
reverse polarity signals or input signals rising above 120% of the
maximum input signal. If reverse polarity or levels are maintained
above 120%, signals may be degraded and component damage may
result.
Terminals 5 and 3
4Ć20ĂmA Input
This terminal is provided to terminate a +4 to 20 mA DC speed reference
signal. The minus signal is terminated at Logic Common. Parameter 9
enables and selects the 4-20mA input signal. Parameters 52, 53 and 54 sets
the input signal to be either directly or inversely proportional. The input
impedance from Terminal 5 to logic common is approximately 390
Ω
. The
range of frequency control is between the minimum and maximum drive
frequency settings or frequency clamps. The frequency resolution is 0.1 Hz
up to 100 Hz, 0.2 Hz up to 200 Hz, and 0.5 Hz if over 200 Hz.
Terminals 6 and 3
Analog Meter Output
This terminal provides a 0-1mA or 0-10V DC signal that may be used with
a user supplied analog meter. The minus signal is terminated at logic
common. Switch SW1, a 1mA/10V switch on the Control Board, sets the
output signal to either 0-1mA or 0-10V.
For a 0–1mA voltage output, the load impedance of the meter must be
10k
Ω
or less.
For a 0–10V voltage output, the load impedance of the meter must be
300Ω
or less.
Parameter 55 is used to set the 1mA output signal to equal 75-125% of
maximum output frequency while the drive is running. Parameter 56 is
used to adjust the 10V to equal 75-125% of maximum output frequency
while the drive is running.