Quadrature Encoder Input Module for Compact FieldPoint
NI cFP-QUAD-510
• 4-axis quadrature encoder inputs
• Differential or single-ended inputs
• 5 to 30 VDC
• 32-bit position registers
• 16-bit velocity registers
• Onboard 5 V regulated
power supply
• 2,300 V
rms
bank isolation for transient
overvoltage protection
• Hot-swappable with
autoconfiguration
• -40 to 70 °C operating range
Module
cFP-QUAD-510
Number of Quadrature
Encoder Inputs
4
Position Resolution
32-bit
Velocity Resolution
16-bit
Lowpass Filter Cutoff
250 kHz
Voltage Inputs
5 to 30 VDC
Regulated Power Output
5 V at 600 mA
Overview
The National Instruments cFP-QUAD-510 is a versatile quadrature
encoder input module for Compact FieldPoint that you can use to directly
measure position and velocity in a motion control application. This
module can connect to differential and single-ended quadrature
encoders with inputs between 5 and 30 VDC. It is commonly used in
motion control applications with cFP-PWM-520 modules, Compact
FieldPoint relay modules, cFP-PG-522 modules, or an external serial
motor controller. The NI cFP-QUAD-510 includes onboard diagnostics to
ensure trouble-free installation and maintenance.
Velocity Operation
The cFP-QUAD-510 has four independent 16-bit velocity counters. The
module returns the velocity as the number of counts per microsecond.
A positive number indicates motion in the forward direction, and a
negative number indicates motion in the reverse direction. There are
eight selectable resolution ranges, so you can read the velocity average
over a long period of time or read an instantaneous velocity reading.
Isolation
The cFP-QUAD-510 features optical bank isolation with 2,300 V
rms
of
breakdown isolation. It does not have channel-to-channel isolation.
Quadrature Encoder Input Module
The cFP-QUAD-510 accepts up to four channels of single-ended or
differential quadrature encoder inputs and can measure position and
velocity in both forward and reverse directions. The module also provides
a regulated power supply to power 5 V encoders.
Power Requirements
Because the cFP-QUAD-510 requires up to 1.2 W of power, it can limit
the number of I/O modules that you can connect to a single network
interface module. Controllers and network interface modules supply up
to 9 W to power I/O modules.
Position Operation
The module has four independent 32-bit position counters. You can
easily accommodate encoders with various phase relationships by
swapping the phase A and phase B signals. Each position counter has
an index input. You can program the counter to reset when the index is
turned on. The encoder can record frequencies as high as 1 MHz.
Field I/O Connections
Compact FieldPoint modules include a built-in power distribution bus
that provides multiple power connections on the modules. A field-wired
power supply connected to the voltage (V) and common (C) terminals is
internally regulated to 5 VDC and is connected to a power distribution
bus that offers additional breakout terminals for voltage supply (+5 V)
and common (COM). These terminals deliver a convenient way to
distribute power to field devices that require external power.
NI [ NATIONAL INSTRUMENTS CORPORATION ]
