National Instruments UMI-7764 User manual

FlexMotion ™and ValueMotion ™are trademarks of National Instruments Corporation. Product and company names mentioned herein are
trademarks or trade names of their respective companies.
321941B-01 ©Copyright 1998, 1999 National Instruments Corp. All rights reserved. August 1999
USER GUIDE
UNIVERSAL MOTION INTERFACE (UMI) ACCESSORY
This user guide describes how to use the UMI-7764, UMI-4A, UMI-Flex6,
and UMI-Flex4 accessories.
Contents
Introduction.............................................................................................2
What You Need to Get Started ...............................................................2
UMI-7764................................................................................................4
Motion I/O Terminal Block.............................................................5
Amplifier/Driver Terminal Block....................................................5
Encoder Terminal Block..................................................................6
Limit Switch Terminal Block..........................................................8
Analog Input Terminal Block..........................................................9
Breakpoint Output/Trigger Input Terminal Block........................... 9
Shutdown/Inhibit All Terminal Block.............................................10
Power Input Terminal Block............................................................ 10
UMI-7764 Specifications........................................................................11
UMI-4A...................................................................................................13
Amplifier/Driver Terminal Block....................................................13
Encoder Terminal Block..................................................................15
Limit Switch Terminal Block..........................................................16
Digital I/O Terminal Blocks ............................................................17
Power Input Terminal Block............................................................ 18
UMI-4A Specifications...........................................................................19
UMI-Flex6 ..............................................................................................21
Amplifier/Driver Terminal Block....................................................21
Encoder Terminal Block..................................................................22
Limit Switch Terminal Block..........................................................24
Analog Input Terminal Blocks ........................................................25
Breakpoint Output Terminal Block .................................................26
Power Input Terminal Block............................................................ 26
UMI-Flex6 Specifications.......................................................................27
UMI-Flex4 ..............................................................................................28
Amplifier/Driver Terminal Block....................................................28
Encoder Terminal Block..................................................................30
Limit Switch Terminal Block..........................................................32
Analog Input Terminal Block..........................................................32
Breakpoint Output Terminal Block .................................................33
Power Input Terminal Block............................................................ 33
UMI-Flex4 Specifications.......................................................................34

UMI Accessory User Guide 2 www.natinst.com
Introduction
The UMI products are connectivity accessories you can use with your
motion control boards for up to four or six axes of simultaneous or
independent control. Ideally suited to industrial and laboratory
applications, UMI accessories connect power supplies, servo amplifiers
or stepper drivers, motors, encoders, and limit switches to National
Instruments plug-in motion control boards.
A UMI accessory simplifies field wiring with separate encoder, limit
switch, and amplifier/driver terminal blocks per axis. All terminal blocks
are industry standard and do not require any special tools for wire
installation. The UMI accessory connects to the motion controller via a
single interface cable. The UMI accessory has a host bus monitor power
interlock that automatically disables the amplifiers if the host computer is
shut down or the interface cable is disconnected.
The UMI-4A and UMI-Flex4 come with an integrated DIN-rail mounting
base. The UMI-Flex6 is encased in metal and comes with attached rubber
feet for desktop use; a DIN-rail mounting kit is available separately. The
UMI-7764 is encased in a metal box with a hinged lid and comes with
attached rubber feet for desktop use.
Note Throughout this document, overlined text indicates that a signal is active-low.
What You Need to Get Started
To set up and use your UMI accessory, you will need the following items:
❑One of the following UMI accessories:
–UMI-7764
–UMI-4A
–UMI-Flex6
–UMI-Flex4
❑Universal Motion Interface (UMI) Accessory User Guide

©National Instruments Corporation 3 UMI Accessory User Guide
❑One of the following National Instruments cables:
❑+5 V power supply
❑(Optional) Auxiliary power supply (UMI-4A only)
❑(Optional) ISO power supply (UMI-Flex4 and UMI-Flex6 only)
Detailed specifications for each of the UMI accessories are in the
Specifications section for each device.
UMI Accessory Cable Motion Controller
UMI-7764 SH68-C68-S All 7344 controllers,
PCI-7324, PCI-7314
UMI-7764 SH68-68-S PXI-7324, PXI-7314
UMI-4A SH50-50, NB1 50-pin ValueMotion
controllers
UMI-Flex6,
UMI-Flex4 SH-Flex-100 100-pin FlexMotion controllers

UMI Accessory User Guide — UMI-7764 4 www.natinst.com
UMI-7764
This section describes the UMI-7764 terminal block. Refer to Figure 1 to
help you locate the different parts of the UMI-7764 accessory.
Figure 1. UMI-7764 Parts Locator Diagram
1 Axis 1 Motion I/O Terminal Block
2 Axis 3 Motion I/O Terminal Block
3 Axis 2 Motion I/O Terminal Block
4 Axis 4 Motion I/O Terminal Block
5 Power Input Terminal Block
6 Shutdown/Inhibit All Terminal Block
7 Inhibit Output Polarity Switch (S1)
8 Inhibit Input Polarity Switch (S2)
9 Analog Input Terminal Block
10 68-Pin Motion I/O Connector
11 Breakpoint/Trigger Terminal
Block
1
11
2 3 45
9 8 7
6
10

©National Instruments Corporation 5 UMI Accessory User Guide — UMI-7764
Motion I/O Terminal Block
Each axis connected to the UMI-7764 has a motion I/O terminal block to
which the following signals are wired:
• Amplifier/driver connections
• Encoder connections
• Limit switch connections
• Distributed power connections
Figure 2 shows which portions of the terminal block are used for different
functionality.
Figure 2. UMI-7764 Motion I/O Terminal Block
Amplifier/Driver Terminal Block
Each UMI-7764 axis motion I/O terminal block has five terminals for
amplifier/driver connections. Refer to Figures 1 and 2 to locate the
amplifier/driver terminals on your UMI-7764 accessory. Figure 3 shows
the UMI-7764 amplifier/driver terminal block pin assignment for the
servo/stepper axes.
Forward Limit
Home Input
Reverse Limit
Inhibit Input
Digital Ground
Analog Output
Analog Output Ground
Inhibit Output
Step (CW)
Dir (CCW)
+5 V (Output)
Digital Ground
Encoder Phase A
Encoder Phase A
Encoder Phase B
Encoder Phase B
Encoder Index
Encoder Index
Limit Switch
Terminals
Amplifier/Driver
Terminals
Distributed
Power
Encoder
Terminals

UMI Accessory User Guide — UMI-7764 6 www.natinst.com
Figure 3. UMI-7764 Axes Amplifier/Driver Terminal Block Pin Assignments
The Analog Output signals are used as command outputs to a servo
amplifier or as general-purpose voltage outputs. The Step and Dir signals
are used as command outputs to a stepper driver.
The Inhibit Output signals are used to disable the amplifier/driver for that
axis. The UMI combines the host bus interlock circuit, the Inhibit All
signal, the per axis Inhibit Input signals, and the per axis controller Inhibit
Output to create the per axis Inhibit Output signal. The host bus interlock
monitors the +5 V pin from the motion controller to verify that the
controller is powered and properly connected to the UMI. If the host bus
interlock detects a problem, if the Inhibit All signal is asserted, or if the
Inhibit Input signal or the controller Inhibit Output signal for that axis is
asserted, the Inhibit Output from the UMI-7764 for that axis is asserted.
You can configure the axis Inhibit Out signal as active-low or active-high
output using switch S1. Setting S1 to the bottom configures the signal as
active-low; setting S1 to the top configures the signal as active-high.
Note You must configure the controller’s Inhibit Output signals as active-low for proper
operation of the inhibit circuitry.
Encoder Terminal Block
Each UMI-7764 axis motion I/O terminal block has six terminals for
incremental encoder connections. The UMI-7764 accepts either
single-ended TTL or differential line driver inputs. You can connect
open-collector encoders to the UMI-7764 accessory by installing a 2.2 kΩ
pull-up resistor to +5 V.
Note Encoders with line driver outputs are recommended for all applications and must be
used if the encoder cable length is greater than 10 feet.
Analog Output
Inhibit Output
Step (CW)
Dir (CCW)
Analog Output Ground

©National Instruments Corporation 7 UMI Accessory User Guide — UMI-7764
Power for the encoders is internally routed from the power input terminal
block and is available on the +5 V terminal on each axis motion I/O
terminal block. You must supply a +5 V source to the power input terminal
block for proper operation. Refer to Figures 1 and 2 to help you locate the
encoder terminals on your UMI-7764 accessory. Figure 4 shows the wiring
for a differential encoder.
Note The dotted loop indicates a shielded cable.
Figure 4. Differential Encoder Wiring
Figure 5 shows the wiring for the single-ended encoder.
Figure 5. Single-Ended Encoder Wiring
The UMI-7764 accessory allows for differential inputs for Phase A,
Phase B, and Index signals. You can easily accommodate encoders with
phase relationships different from Figure 6 by swapping the signals as
required by the specific application. The Index pulse must occur when both
Phase A and Phase B signals are logic low as shown in Figure 6. Servo and
closed-loop stepper applications require encoder feedback and consistent
directional polarity between the motor and encoder for stable operation.
The UMI-7764 uses the following standards for motor direction:
• Positive = forward = Clockwise (CW) facing motor shaft
• Negative = reverse = Counter-clockwise (CCW) facing motor shaft
Phase A
Phase B
Phase B
Index
Index
Phase A
Shield1
1Connect to Digital Ground
Phase A
Phase B
Index
Shield1
1Connect to Digital Ground

UMI Accessory User Guide — UMI-7764 8 www.natinst.com
Figure 6. Encoder Signal Phasing—CW Rotation
The encoder inputs are filtered by both analog and digital noise filters. You
must use cables with twisted pairs and an overall shield for improved noise
immunity. When connecting the encoder to the UMI-7764, you should use
at least 24-AWG wire.
Caution Using an unshielded cable allows noise to corrupt the encoder signals, which
results in lost counts, reduced accuracy, and other erroneous encoder and controller
operations.
Limit Switch Terminal Block
Each UMI-7764 axis motion I/O terminal block has five terminals for
Forward and Reverse Limit and Home Input switch connections. Refer to
Figures 1 and 2 to help you locate the limit switch terminals on your
UMI-7764 accessory. See Figure 7 for the UMI-7764 limit switch terminal
block pinout.
Figure 7. UMI-7764 Limit Switch Terminal Block Pin Assignment
You can configure the axis Inhibit Input signals as active-low or active-high
inputs using switch S2. Setting S2 to the bottom configures the signal as
active-low; setting S2 to the top configures the signal as active-high. The
Inhibit Input signals include a 3.3 kΩpull-up resistor on their inputs.
Phase A
Phase B
Index
Forward Limit
Home Input
Reverse Limit
Inhibit Input
Digital Ground

©National Instruments Corporation 9 UMI Accessory User Guide — UMI-7764
Analog Input Terminal Block
For analog input wiring, the UMI-7764 has a 6-position terminal block,
which provides access to the four analog input channels on your motion
controller. Refer to Figure 1 to help you locate the analog input terminal
block on your UMI-7764 accessory. See Figure 8for analog input terminal
block pinout information.
Figure 8. UMI-7764 Analog Input Terminal Block Pin Assignments
Breakpoint Output/Trigger Input Terminal Block
For breakpoint output and trigger input wiring, the UMI-7764 has a
10-position terminal block. This terminal block provides access to the four
breakpoint outputs and the four trigger inputs. Refer to Figure 1 to help you
locate the breakpoint output/trigger input terminal block on your
UMI-7764 accessory. See Figure 9 for more information on breakpoint
output and trigger input wiring.
Figure 9. UMI-7764 Breakpoint/Trigger Terminal Block Pin Assignments
Analog Input 4
Analog Input 3
Analog Input 2
Analog Input 1
Analog Reference (Output)
Analog Input Ground
Breakpoint 4
Breakpoint 3
Breakpoint 2
Breakpoint 1
Digital Ground
+5 V (Output)
Trigger 4
Trigger 3
Trigger 2
Trigger 1

UMI Accessory User Guide — UMI-7764 10 www.natinst.com
Shutdown/Inhibit All Terminal Block
The UMI accessory has a 4-position terminal block for shutdown and
inhibit all wiring. Refer to Figure 1 to help you locate the shutdown/inhibit
all terminal block on your UMI-7764 accessory. See Figure 10 for more
information on shutdown/inhibit all wiring.
Figure 10. Shutdown/Inhibit All Terminal Block Pin Assignments
The Inhibit All signal acts as a global inhibit, and, when asserted, activates
theInhibit Outputs. The Inhibit All signalincludes a3.3 kΩpull-up resistor
on its input. The Shutdown signal is passed through to the motion controller
and is typically used to disable the controller.
Power Input Terminal Block
The UMI-7764 has a 2-position terminal block for wiring power to the unit.
Refer to Figure 1 to help you locate the power input terminal block on your
UMI-7764 accessory. Figure 11 shows the 2-position terminal block
pinout.
Figure 11. 2-Position Power Input Terminal Block Pin Assignment
Note To properly operate your UMI-7764 accessory, you must supply a +5 V source to
the power input terminal block.
Note The +5 V power is redistributed to other terminal blocks as an output power source.
Shutdown
Inhibit All
NC
Digital Ground
+5 V
Digital Ground

©National Instruments Corporation 11 UMI Accessory User Guide — UMI-7764 Specifications
UMI-7764 Specifications
The following specifications apply only to the UMI-7764 accessory. To
obtain a system specification, you must account for your motion controller.
Please refer to your controller specifications to determine overall system
specifications.
Some signals have compatibility defined as signal pass-through. This
means the UMI-7764 may have passive filtering on these signals but will
not affect the voltage range or current handling capability. Consult your
motion controller specifications to determine the allowable voltage range
and logic level compatibility of the signal.
These specifications are typical at 25 °C unless otherwise specified. Refer
to your motion controller user manual for detailed specifications on
encoder inputs, limit and home switch inputs, breakpoint outputs, trigger
inputs, and analog inputs.
Encoder Interface (Each Axis)
Inputs......................................................Quadrature, incremental
Differential input threshold....................±0.3 V (typical)
Single-ended input threshold .................TTL/CMOS
Voltage range.........................................0 to 5 VDC
Noise filter (RC time constant)..............100 ns
Max quadrature frequency .....................1 MHz
Limit and Home Switch Inputs (Each Axis)
Noise filter (RC time constant)..............10 µs
Compatibility .........................................Signal pass-through
Trigger Inputs
Noise filter (RC time constant)..............100 ns
Compatibility .........................................Signal pass-through

UMI Accessory User Guide — UMI-7764 Specifications 12 www.natinst.com
Inhibit and Inhibit All Inputs
Voltage range..........................................0 to 12 VDC
Input voltage threshold...........................TTL/CMOS
Input pull-up resistor ..............................3.3 kΩ
Compatibility..........................................Signal pass-through
Analog Inputs
Noise filter (RC time constant)...............10 µs
Compatibility..........................................Signal pass-through
Axis Inhibit Out
Voltage range..........................................0 to 5 VDC
Output low voltage .................................0.5 V at 16 mA
Output high voltage ................................2.4 V at 3.2 mA
Operating Environment
Temperature............................................0 to 55 °C
Storage temperature................................–20 to 70 °C
Relative humidity ...................................10 to 90% (noncondensing)
Power Requirements
+5 VDC...................................................0.2 amps + user-defined encoder
and limit power
Host Bus Voltage Interlock
Voltage....................................................5 VDC ± 5%
Physical
Dimensions.............................................19.5 by 15.2 by 4.5 cm
(7.7 by 6.0 by 1.8 in.)

©National Instruments Corporation 13 UMI Accessory User Guide — UMI-4A
UMI-4A
This section describes the UMI-4A terminal block. Refer to Figure 12 to
help you locate the different parts of the UMI-4A accessory.
Figure 12. UMI-4A Parts Locator Diagram
Amplifier/Driver Terminal Block
For amplifier/driver wiring, each UMI-4A axis has a separate 6-position
terminal block. Refer to Figure 12 to help you locate the amplifier/driver
terminal block on your UMI-4A accessory. Figure 13 shows the terminal
block pin assignment for the UMI-4A amplifier/driver used with a servo
board.
Figure 13. UMI-4A Amplifier/Driver with Servo Terminal Block Pin Assignment
Amplifier
Connectors
1 Axis 1 (J13)
2 Axis 2 (J14)
3 Axis 3 (J15)
4 Axis 4 (J16)
Encoder
Connectors
5 Axis 1 (J2)
6 Axis 2 (J4)
7 Axis 3 (J6)
8 Axis 4 (J8)
Limits
Connectors
9 Axis 1 (J3)
10 Axis 2 (J5)
11 Axis 3 (J7)
12 Axis 4 (J9)
Other
Connectors
13 I/O Bits 1–4 (J10)
I/O Bits 5–8 (J11)
14 Opto 22 Compatible (J19)
15 Power (J18)
Miscellaneous
16 ValueMotion Controller (J1)
17 Jumpers (Axes 1–4)
18 Assembly Number
19 Serial Number
20 Reserved—Do not remove
1 2 36
548
17
14
15
12 1613
20 9 19 10 18 11
7
1
2
3
4
5
Analog Output
Analog Output Ground
6
I/O Bit (Axis #)
+5 V (Output)
Digital Ground
System Inhibit

UMI Accessory User Guide — UMI-4A 14 www.natinst.com
The analog output signals are used as command outputs to a servo
amplifier. The System Inhibit output signals are used to disable all of the
amplifiers. The UMI accessory combines the host bus interlock circuit and
the Enable Input signals to create the global System Inhibit signals. The
host bus interlock monitors the +5 V pin from the motion controller to
verify that the controller is powered and properly connected to the UMI. If
the host bus interlock detects a problem, or if both Enable Input signals are
deasserted, the System Inhibit signals are asserted.
Figure 14 shows the UMI-4A amplifier/driver terminal block pin
assignment used with a stepper board.
Figure 14. UMI-4A Amplifier/Driver with Stepper Terminal Block Pin Assignment
The Step and Dir signals are used as command outputs to a stepper driver.
The Inhibit Output signals are used to disable the driver for that axis. The
UMI accessory combines the host bus interlock circuit, the Enable Input
signals, and the per axis controller Inhibit Output to create the per axis
Inhibit Output signal. If the voltage drops to the host bus interlock circuit,
if both Enable Inputs are deasserted, or if the controller Inhibit Output for
that axis is asserted, the Inhibit Output signal for that axis is asserted.
To configure your UMI-4A accessory for servo, move all four jumpers to
the right. To configure your accessory for stepper, move all four jumpers to
the left. See Figure 15 for more information on configuring your UMI-4A
jumpers. Refer to Figure 12 to help you locate the jumpers on your
UMI-4A accessory.
Figure 15. UMI-4A Jumper Configuration
1
2
3
4
5
Step (CW)
Dir (CCW)
6
I/O Bit (Axis #)
+5 V (Output)
Digital Ground
Inhibit Output
Servo Stepper

©National Instruments Corporation 15 UMI Accessory User Guide — UMI-4A
Encoder Terminal Block
For incremental encoder connections, each UMI-4A axis has a separate
8-position terminal block. UMI-4A accepts either single-ended TTL or
differential line driver inputs. You can connect open-collector encoders to
the UMI-4A accessory by installing a 2.2 kΩpull-up resistor to +5 V.
Note Encoders with line driver outputs are recommended for all applications and must be
used if the encoder cable length is greater than 10 feet.
Power for the encoders is internally routed from the power input terminal
block and is available on pin 7 (+5 V). You must supply a +5 V source to
the power input terminal block for proper operation. Refer to Figure 12 to
help you locate the encoder terminal blocks on your UMI-4A accessory.
Figure 16 shows the wiring for the differential encoder.
Note The dotted loop indicates a shielded cable.
Figure 16. Differential Encoder Wiring
Figure 17 shows the wiring for the single-ended encoder.
Figure 17. Single-Ended Encoder Wiring
1
2
3
4
5
6
7
8
Phase A
Phase B
Phase B
Index
Index
+5 V (Output)
Digital Ground
Phase A
Shield
1
2
3
4
5
6
7
8
Phase A
Phase B
Index
+5 V (Output)
Digital Ground
Shield

UMI Accessory User Guide — UMI-4A 16 www.natinst.com
The UMI-4A accessory allows for differential inputs for Phase A, Phase B,
and Index signals. You can easily accommodate encoders with phase
relationships different from Figure 18 by swapping the signals as required
by the specific application. The Index pulse must occur when both Phase A
and Phase B signals are logic low as shown in Figure 7. Servo and
closed-loop stepper applications require encoder feedback and consistent
directional polarity between the motor and encoder for stable operation.
The UMI-4A uses the following standards for motor direction:
• Positive = forward = Clockwise (CW) facing motor shaft
• Negative = reverse = Counter-clockwise (CCW) facing motor shaft
Figure 18. Encoder Signal Phasing—CW Rotation
The encoder inputs are filtered by both analog and digital noise filters. You
must use cables with twisted pairs and an overall shield for improved noise
immunity. When connecting the encoder to the UMI-4A, you should use at
least 24-AWG wire.
Caution Using an unshielded cable allows noise to corrupt the encoder signals, which
results in lost counts, reduced accuracy, and other erroneous encoder and controller
operations.
Limit Switch Terminal Block
For forward and reverse limit and home switch connections, each UMI-4A
has a separate 6-position terminal block per axis. All limit and home switch
inputs are filtered on the UMI-4A to enhance noise immunity.
The UMI-4A supports active and passive limit switches. You can use
auxiliary VDC on pin 4 to power active, open-collector limit switches. To
use the auxiliary VDC you must supply a voltage to the auxiliary VDC
input (pin 2 of the power input terminal block). Refer to Figure 12 to help
you locate the limit switch terminal block on your UMI-4A accessory.
Figure 19 shows an example of a passive limit switch terminal block
pinout.
Phase A
Phase B
Index

©National Instruments Corporation 17 UMI Accessory User Guide — UMI-4A
Figure 19. UMI-4A Limit Switch Terminal Block Pin Assignment
(Passive Limit Switch Connection Example)
Digital I/O Terminal Blocks
The UMI-4A has two I/O connectors: a 34-pin male box header (J19),
which is compatible with standard Opto 22 I/O racks, and two 6-pin
removable screw terminal blocks (J10 and J11) for all other I/O
configurations. You can use both I/O configurations separately or in
parallel.
Pin 5 of each terminal block (J10 and J11) is an Enable Input connection.
This connection controls a system enable–system inhibit function. If your
configuration uses the inhibit output signal available on each per-axis
driver/amplifier terminal block, the enable input on J10 or J11 must be
connected to the common (ground) signal to enable the driver/amplifier.
Note You do not need to duplicate the switch on both J10 and J11; use only one or the
other for the Enable Input.
Figure 20. Using Available Pins On J10 and J11
Caution If you connect the enable input to the common signal and bypass the
enable/disable function, you need to provide enable/disable control of the
drivers/amplifiers elsewhere in the system.
1
2
3
4
5
6
Forward Limit
Home Switch
Reverse Limit
Aux.VDC
+5 V (Output)
Digital Ground
1
2
3
4
5
6
I/O 1
I/O 2
I/O 3
I/O 4
Enable Input
Digital Ground
1
2
3
4
5
6
I/O 51
I/O 61
I/O 71
I/O 81
Enable Input
Digital Ground
or
J10 J11
1Reserved when used with a stepper board. Do not connect anything to these pins.

UMI Accessory User Guide — UMI-4A 18 www.natinst.com
Figure 21 shows the 34-pin Opto 22 compatible connector.
Figure 21. 34-Pin Opto 22 Compatible Connector Pin Assignment
Power Input Terminal Block
The UMI-4A has a 4-position terminal block for wiring power to the unit.
Refer to Figure 12 to help you locate the power input terminal block on
your UMI-4A accessory. Figure 11 shows the 4-position terminal block
pinout.
Figure 22. 4-Position Power Input Terminal Block Pin Assignment
Note To properly operate your UMI-4A accessory, you must supply a +5 V source to the
power input terminal block.
Note The auxiliary VDC input on the power input terminal block is optional and is
redistributed to other terminal blocks as an output power source.
N/C
I/O Bit 1
I/O Bit 2
I/O Bit 3
I/O Bit 4
I/O Bit 5
I/O Bit 6
I/O Bit 7
I/O Bit 8
N/C
N/C
N/C
N/C
N/C
N/C
N/C
N/C
Digital Ground
Digital Ground
Digital Ground
Digital Ground
Digital Ground
Digital Ground
Digital Ground
Digital Ground
Digital Ground
Digital Ground
Digital Ground
Digital Ground
Digital Ground
Digital Ground
Digital Ground
Digital Ground
Digital Ground
33 34
31 32
29 30
27 28
25 26
23 24
21 22
19 20
17 18
15 16
13 14
11 12
910
78
56
34
12
1
2
3
4
+5 V
Aux.VDC
NC
Digital Ground

©National Instruments Corporation 19 UMI Accessory User Guide — UMI-4A Specifications
UMI-4A Specifications
The following specifications apply only to the UMI-4A accessory. To
obtain a system specification, you must account for your motion controller.
Please refer to your controller specifications to determine overall system
specifications.
Some signals have compatibility defined as signal pass-through. This
means the UMI-4A may have passive filtering on these signals but will not
affect the voltage range or current handling capability. Consult your motion
controller specifications to determine the allowable voltage range and logic
level compatibility of the signal.
These specifications are typical at 25 °C unless otherwise specified. Refer
to your motion controller user manual for detailed specifications on
encoder inputs, limit and home switch inputs, breakpoint outputs, trigger
inputs, and analog inputs.
Encoder Interface (Each Axis)
Inputs......................................................Quadrature, incremental
Differential input threshold....................±0.3 V (typical)
Single-ended input threshold .................TTL/CMOS
Voltage range.........................................0 to 5 VDC
Noise filter (RC time constant)..............100 ns
Max quadrature frequency .....................1 MHz
Limit and Home Switch Inputs (Each Axis)
Noise filter (RC time constant)..............10 µs
Compatibility .........................................Signal pass-through
Configurable I/O
Compatibility .........................................Signal pass-through
Opto 22 compatible................................via J19 connector

UMI Accessory User Guide — UMI-4A Specifications 20 www.natinst.com
Operating Environment
Temperature............................................0 to 55 °C
Storage temperature................................–20 to 70 °C
Relative humidity ...................................10 to 90% (noncondensing)
Power Requirements
+5 VDC...................................................0.2 A + user-defined encoder
power
Aux. VDC...............................................User-defined limit switch power
Host Bus Voltage Interlock
Voltage....................................................5 VDC ± 5%
Physical
Dimensions.............................................23.62 by 10.03 cm
(9.3 by 3.95 in.)
Universal DIN-rail base
(supplied)