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Class 8998 Motor Control Centers
Sample Specifications
228
09/2003
© 2000–2003 Schneider Electric All Rights Reserved
2.11 Operator Interface
a. The operator interface terminal will offer the modification of AC inverter adjustments via a touch
keypad. All electrical values, configuration parameters, I/O assignments, application and activity
function access, faults, local control, and adjustment storage will be in plain English. There will be a
standard selection of four additional languages built-in to the operating software as standard.
b. As a minimum, the selectable display outputs shall consist of speed reference, output frequency,
output current, line voltage, output power, energy consumed, run time, motor thermal state, drive
thermal state, and motor speed.
c. A keypad scrolling function shall allow dynamic switching between display variables.
d. A programmable access code will limit access to programmable functions. A hardware selector
switch shall allow the terminal keypad to be locked out from unauthorized personnel.
e. The keypad shall store in non-volatile memory up to four user configuration parameters. An operator
shall have the ability to download a stored configuration to multiple AC inverters.
f. There will be arrow keys that will provide the ability to scroll through menus and screens, select or
activate functions, or change the value of a selected parameter.
g. A data entry key will allow the user to confirm a selected menu, numeric value, or allow selection
between multiple choices.
h. A RUN key and a STOP key will command normal starting and stopping as programmed when the
AC drive controller unit is in keypad control mode. The STOP key must be active in all control modes.
i. A user interface shall be available through a Windows-based personal computer, serial
communication link, or detachable operator interface.
j. The operator interface shall be MCC door mounted on the AC drive controller unit for ease of access
and increased visibility.
k. The keypad and all door-mounted controls shall be NEMA Type 12 rated.
2.12 Control
a. External pilot devices shall be able to be mounted on a door-mounted control station for starting and
stopping the AC drive controller unit, speed control, and displaying operating status. All control
inputs and outputs shall be software assignable. Software assignments for control inputs and
outputs to operate factory-supplied controls shall be pre-configured from the factory.
b. Strategies for 2-wire or 3-wire control shall be defined within the software.
c. The control power for the digital inputs and outputs shall be 24 Vdc.
d. The internal power supply incorporates an automatic current fold-back that protects the internal
power supply if incorrectly connected or shorted. The transistor logic outputs shall be current-limited
and not be damaged if shorted or excess current is pulled.
e. All logic connections shall be furnished on pull-apart terminal strips.
f. There shall be two software-assignable, isolated analog inputs. One analog input shall be software-
selectable and consist of the following configurations: 0 to 20 mAdc, 4 to 20 mAdc, 20 to 4 mAdc,
x to 20 mAdc (where x is user-defined). The other analog input shall be 0 to 10 Vdc.
g. There shall be four isolated logic inputs, three that shall be selected and assigned in the software.
h. Two voltage-free Form C relay output contacts shall be provided. One of the contacts shall indicate
AC inverter fault status; the other contact shall be user-assignable.
i. There shall be one software-assignable analog current output configurable between x and y mADC
(where x and y are user defined from 0 to 20 mADC). The analog output shall be updated every 2ms
maximum.
2.13 Optional General Purpose Input/Output Extension
j. There shall be a general-purpose hardware extension module incorporated with each AC drive
controller. The module shall be fully isolated and have pull-apart terminal strips. The module shall
add three analog outputs and one Form C relay output. All of the analog outputs shall be user-
assignable. Additional loss of follower functionality shall include the ability to run at the last valid
speed reference or a selectable preset speed.