Emerson iPro, Installation And Operation Manual

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34 • iPro Case Controller I&O Manual FM V1.01 026-1738 Rev 1
10.5.2. Fan Motor Current Monitoring
The case controller has the ability to monitor the fan motor RMS current of each case through the use of an external current transducer.
The current transducer should be placed on the fan circuit for the entire case. The current transducer is Emerson P/N 251-7000 and is a
0-5VDC signal, split core sensor with a selectable range of 30, 60, and 120 amps. The case controller will monitor the fan amperage once
the relay call for the fan is ON, and once the amperage sensed by the fan CT is above a threshold for a time delay, the fan motor status
is considered ON. If the fan relay call and fan motor status are not equal, a command failure alarm is automatically sent to the E2E and
the E2E will generate an alarm log entry. If you do not wish to use the fan motor current monitoring, do not set up any analog inputs for
fan amps .
Parameters:
10.5.3. System Enable/Disable
The case controller can be enabled/disabled through digital input, E2E, or locally from Visograph. The controller always defaults to

enabled and will disable if any of the three (3) disable signals are received. When a disable command is received the controller will:
• Disable all regulation of refrigeration
• Drive EEVs and EEPR to 0%
• Disable fans, lights, and defrost capability
There is a configurable time delay on the closing of the valves to allow the system to pump out the evaporator coil before shutting the
suction valve.
FSt Fan temperature activation setpoint -10 to 70° Fahrenheit
FHy Fan temperature activation setpoint

hysteresis
1 to 30° Fahrenheit
Ftd Fan activation time delay 0 to 10 Minutes
FanAmpOn Amps from CT required for fan status to be
considered ON
0 to 60 Amps
FanAmpDel Time delay for status change once amps
reach threshold
1 to 90 Seconds
Table 10-11 - Fan Control Parameters
Parameter Description Range
fanAmpOn Amps required from the CT for the fan motor to be

considered ON
0-60 Amps
fanAmpDel Time delay for the fan motor status to change to ON
once the threshold is reached.
1-90 Seconds
Table 10-12 - Fan Current Monitoring Parameters