Rockwell Automation 1395 Digital DC Drive FRN 5-10.10/9.30 - Manual (Page 38)

Chapter 2
Hardware Description
1 – 30 HP, 230VAC 2 – 60 HP, 460VAC
2-16
Discrete Adapter Board The Discrete Adapter Board connects directly to the Main Control Board
using Port A of the Microbus interface. All user connections to the board
are made at Terminal Block TB-3 located at the bottom of the 1395 Drive.
Digital Inputs – The Discrete Adapter Board contains four discrete inputs
and is available in 120VAC or 24VDC versions. These optically coupled
inputs provide a means for external control of the 1395 via pushbuttons,
relays, switches, etc.
The inputs are preconfigured for the following signals: STOP, JOG,
START, CLEAR FAULT.
Digital Outputs – Two discrete outputs are provided through control of
two on-board relays. The contact rating is 0.6A at 125VAC and 0.2A at
30VDC. These outputs allow the 1395 to signal various operating states of
the Drive.
The outputs are preconfigured for the following signals: DRIVE
RUNNING and AT ZERO SPEED.
Analog Inputs – Four preprogrammed 12-bit analog to digital inputs.
These inputs allow a +/– 10VDC analog signal to be converted to a +/–
2048 digital signal, thus providing 4.88 millivolts per bit resolution.
Through programming of associated Scale and Offset parameters the
effective range of the converted signal can be extended to +/–32767.
The analog inputs are preconfigured for the following signals:
VELOCITY REFERENCE, TACH VELOCITY, TRIM REFERENCE.
Analog Outputs – Four preprogrammed 11 bit digital to analog outputs.
These outputs allow a +/– 1024 drive signal to be converted to a
+/–10VDC analog output, thus giving 9.76 millivolts per bit resolution.
Through programming of associated Scale and Offset parameters the
effective range of the Drive signal can be extended to +/– 32767.
The analog outputs are preconfigured for the following signals:
VELOCITY FEEDBACK, FIELD CURRENT FEEDBACK,
ARMATURE CURRENT FEEDBACK and ARMATURE VOLTAGE
FEEDBACK.
All inputs and outputs have the flexibility to be reconfigured by the user
for other signals. For a detailed description of the Discrete Adapter, refer
to the Discrete Adapter manual.
Digital Reference Adapter Board The Digital Reference Adapter Board connects directly to the Main
Control Board using Port A of the Microbus interface. This interface
supplies the Adapter Board with all logic voltages and communication
capabilities. The Digital Reference Adapter has the following inputs and
outputs:
Digital Reference Input – One digital frequency reference input which
produces a digital velocity reference command for the Drive. The Adapter
Board is set up by default for the encoder input signal to be single channel
dual edge (ie. both the rising edge and falling edge are used by the
counting logic).
Digital Inputs – Ten programmable discrete inputs for 24VDC signals.
They can be connected to any Sink parameter such as the Logic command
word. All ten inputs are LED indicated for high input level visibility.
These optically coupled inputs provide a means for external control of the
1395 via pushbuttons, relays, switches, etc.