Operational Theory Xenus XSL User Guide
42 Copley Controls Corp.
2.13: Inputs
2.13.1: Digital Inputs
The amplifier has twelve digital inputs (IN1-IN12). Eleven of them appear on the control connector.
IN5 appears on the feedback connector, and is intended for the motor over temperature switch
(although it can be programmed for any function).
2.13.2: Input Filters
Two types of input RC filters are used: GP (general-purpose) and HS (high-speed). Input
reference functions such as Pulse and Direction, Pulse Up/Pulse Down, and Quadrature A/B are
wired to inputs having the HS filters, and inputs with the GP filters are used for general-purpose
logic functions, limit switches, and the motor temperature sensor.
2.13.3: Debounce Time
To prevent undesired multiple triggering caused by switch bounce upon switch closures, each
input can be programmed with a debounce time. The programmed time specifies how long an
input must remain stable at a new state before the amplifier recognizes the state.
2.13.4: Configure for Pull Up/Pull Down Resistors by Groups
Pre-defined groups of inputs can be programmed to have either an internal pull up or pull down
resistor. See J7 Pin Description (p. 69)
for groupings.
2.13.5: Programmable Input Functions
Enable Input Functions
IN1 can only be programmed to one of the enable functions described below.
Function Description
AMP Enable-
LO Enables with clear faults
When the input is low, amplifier enables PWM output stage. Amplifier
clears faults on the low-to-high transition of the input.
When input is high, the amplifier disables the PWM output stage.
AMP Enable-
HI Enables with clear faults
When the input is high, amplifier enables PWM output stage. Amplifier
clears faults on the high-to-low transition of the input.
When input is low, the amplifier disables the PWM output stage.
AMP Enable-
LO Enables with reset
When the input is low, amplifier enables PWM output stage. Amplifier
resets on the low-to-high transition of the input.
When input is high, the amplifier disables the PWM output stage.
AMP Enable-
HI Enables with reset
When the input is high, amplifier enables PWM output stage. Amplifier
resets on the high-to-low transition of the input.
When input is low, the amplifier disables the PWM output stage.
AMP Enable-
LO Enables
When the input is low, amplifier enables PWM output stage.
When input is high, the amplifier disables the PWM output stage.
AMP Enable-
HI Enables
When the input is high, amplifier enables PWM output stage.
When input is low, the amplifier disables the PWM output stage.
Multiple Enable Inputs
In addition to IN1, other inputs can be programmed to be additional enables. If there is more than
one input programmed as an enable then all the inputs must be in the enabled state before the
amplifier PWM output stage will be enabled.
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