Installation, Operation, & Maintenance for CRFF-E Series
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Krueger | 1401 N Plano Rd | Richardson, TX 75081 | 972.680.9136 | [email protected] | www.krueger-hvac.com
Electrical Specification
Control and Interface Signals
External Speed 0-1
0
V Input
•
Input impedance 20k0hms.
•
MIN ON-to-OFF threshold: 190mV*
•
MAX OFF-to-ON threshold: 240mV*
•
ON (-215mV) to 9.89V linearly scales 1 to 99% speed.
•
9.89V or more deadbands to 100% speed.
External LED Output
•
1
0
mA regulated.
•
LED forward voltages up to 5V.
RPM Signal
•
Signal Value: mVDC = RPM
•
Ex: 900mV = 900RPM
•
RPM Output Range: - 0, 5 to 2000 RPM (0, 5mV to 2000 mV DC)
•
RPM Output Resolution: 5RPM (zero, 400 steps from 5 to 2000 RPM inclusive)
Specificatio
Min
Typical
Max
Units
Input Voltage
22
24
42
VAC
Supply Frequency
50
50 / 60
60
Hz
Input Power Consumption
n/a
n/a
0.5
VA
Ambient Operating Temperature
0
25
50
C
RJ45 Network Cable Connections
1
2
3
4
5
6
7
8
Bus Power
Pass Through
0V (GND)
RS-485
0V (GND)
Bus Power
Pass Through
+
NC
NC
-
Net LED Status Definitio
Green
LED OFF Power lost or no communications.
LED Flickering
Network data traffic in progress
Green
LED ON A/B network cables are swapped.
RED NETWORK LED
GREEN STATUS LED
FIGURE 9: LED LIGHT LOCATIONS
Test Probe
J
ac
k
Points
The test probe jacks may be used to measure the motor
rpm or the PWM signal that is being output to the motor.
•
In Manual or Analog Control Mode with an Address
setting of 1 or greater, the test probe jacks output
0-2000 mVDC representing motor RPM. By changing
the address DIP switches to 0, the test probe jacks will
output 0-1000 mVDC representing 0-100% demand
signal to the motor. The address may be changed
without interrupting power to the control card.
•
In Network Control Mode, 0-2000 mVDC always
represents RPM.
LED Indicators
•
Onboard Status LED:
The Onboard Status LED is software controlled
by the unit microcontroller. The Status LED is solid
ON when RPM reported by the motor is greater than
zero and OFF when RPM reported by the motor is
zero.
•
External Status LED:
Support for an external Status LED (10mA current-
controlled driver), via a 2-pin MTA connector, for
remote system status notification. The external Status
LED operates in the same manner as the Onboard
Status LED.
•
Onboard Net LED:
The Onboard Net LED is driven directly by the receive
data signal. The NET LED shows all network traffic on
a 2-wire network. The NET LED is intended to
confirm low-level network connectivity,
independent of microcontroller or firmware
functionality. If A/B network wires are swapped, the
NET LED will be normally on, providing quick
diagnostics of this common condition.
Содержание CRFF-E
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