Xytronix Research & Design ControlByWeb X317, Руководство пользователя

Страница: 13 / 68

X-317™ Users Manual Installation and Connections
2.5.2 Analog Output Connections
The analog outputs can be individually programmed to function as 0-5V, 0-10V, ±5V, ±10V, 4-20mA
outputs.
Voltage Output Connections
Many variable frequency drives (VFD), servos and other actuators are controlled by a variable voltage.
To use these devices the
Aout and Com outputs are connected directly to the device to be controlled. A
connection must be made to the Com terminal. Internally the Vin- and Com pins are isolated by the DC-
DC converter. The maximum output current for voltage outputs is 10mA per channel. The five Com pins
are internally connected together.
Current Output connections
Some actuators are designed to respond to a change of DC current instead of the voltage levels. To use
these devices the Aout and Com outputs are connected directly to the device to be controlled. Power for
the current loop is provided by the X-317. The X-317 employs an internal current source for controlling
the output current. The current source saturates at 11.5V. As such the resistance of your output current
loop must not be more than 575 ohms (575ohm x 0.02A = 11.5V). This includes the input resistance of
the actuator and any wiring in the current loop. If the current loop is open or the loop resistance is too
high the respective yellow fault LED will be illuminated and the web page display will show the output
value as xx.xx.
Xytronix Research & Design, Inc. Page 13