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DIGITAL TACHOMETER
AND PROCESS METER
OMDC-DM8000
Starts at
$
335
l Four Devices in One:
Tachometer, Counter, Totalizer,
and Zero Speed Switch
l Selectable Alarm Relay Output
l Control Modes are Selectable
Between Rate, Time, and Counter
l User Inputs Allow for Special
Functions: Counter Reset,
Counter Gate, and Alarm Display
l Non-Volatile Memory for Storage
of Custom Settings
l Universal AC Input Voltage from
85 to 265 Vac
l NEMA 4X Rating
OMDC-DM8000, $335.
The OMDC-DM8000 is an economical
microprocessor-based digital tachometer
system capable of measuring shaft speeds
lower than 1 RPM. With an on-board
microcomputer coupled with sophisticated
internal software and a quartz crystal
controlled reference frequency, the
OMDC-DM8000 is able to maintain accuracy
of ±0.04%, even if the shaft is uneven. The
OMDC-DM8000 is field programmable
through the easy-to-use frontpanel interface
and can be configured to display any desired
unit of measure. Large 13 mm (
LED display numbers allow viewing under
the most adverse conditions.
The isolated 5 amp form C relay output can
be configured for many different alarming
conditions. Designed to use a variety of
inputs, including the hall-effect solid state
OMDC-PU-E Series pick-up, the system
delivers trouble free operation at an
economical cost. The OMDC-DM8000 offers
the same enhanced display options and
capabilities featured inour other digital
control products, as well as the universal
power supply and rugged european-style
terminal strip.
1
⁄
2") 4-digit
The OMDC-DM8000 can be used in process
applications for monitoring speeds and
rates, or counting discrete input signals.
Process applications using counting may be
batching, filling, mixing, punching, cutting,
drilling, diverting, or alarming. While
process applications using speed or rate
monitoring may be conveyors, conveyor
ovens, material flow, rotational rpm,
and testing.
SPECIFICATIONS
ELECTRICAL
Line Input
Voltage: Any voltage from
85 to 265 Vac
Frequency: Any freq from 48 to 62 Hz
Signal Input Frequency Range:
0 to 100,000 pulses per minute
(higher frequencies are possible when
using internal frequency divisor)
Resolution: From 0.01 RPM
Accuracy: ±0.04% display update
every pulse or 0.5 seconds, whichever
is longer
Isolated High/Low Alarm Output:
5 A, 230 Vac
Settable Alarm Range: 0 to 9999
D-1
Transducer Signal Input: 0 to 5 to
0 to 24 Vdc
Display Range: 0.001 to 99,990
Units of Operation: User
programmable, any unit sensor/pickup
Power Supply: 5V @ 50 mA
Isolated Alarm Relay Output Ratings:
240 Vac @ 5A
MECHANICAL
Display Type: LED, red, 4 digit,
13 mm (½") H
Housing Type (With Supplied Gasket in
NEMA 4X Panel): NEMA 4X
Connector Style (Pluggable Connector
Optional): 12-position 5 mm
european-style
Terminal Block Torque Setting:
4.4 in-lb max or 0.5 N-M
Faceplate Material: Polycarbonate with
polycarbonate overlay
Housing Material: Aluminum
Dimensions:
Length (Panel Depth):
117.5 mm (4.6")
Width: 115.3 mm (4.5")
Weight: 382 g (13.5 oz)
ENVIRONMENTAL
Operating Temperature Range:
-10 to 45ºC (15 to 115ºF)
Operating Humidity Range: 95%,
non-condensing
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Cut-Out and Mounting Dimensions: mm (in)
127
(5)
117.4
(4.6)
58.2
(2.3)
41.9
(1.7)
Tach
Ite
m
ValuPage
TAC HOM ETE R
ENTER
101.6 (4)
101.6 (4)
HOUSING DEPTH
117.6 (4.6)
PANEL CUT- OU T
OMDC-DM8000
92 (3.6)
3.6
(0.1) x2
22.4 (0.9)
45 (1.8)
Bi-directional Incremental Position Display
Coupling to
Chain Drive
Tach
Ite
m
ValuPage
TAC H O ME T ER
ENTER
263.4
Drive Train Specs:
40 revolutions = 3.5"
of platform motion
OMDC-PU-20EQUAD
or equivalent
OMDC-DM8000 Meter
530BRE-36M Control
ON
OFF
FWD
REV
Connect to
Coupling
Linear-Motion System
Platform
Description:
A system is needed which will track the position of a bi-directional linear-motion platform
and allow the user to select a home or zero position. The display should read in inches
and indicate the position of the platform at all times.
APPLICATIONS
D-2
Page 3
P1-1
P1-2
P1-3
P1-4
P1-5
P1-6
P1-7
P1-8
OMDC-DM8000
P1-9
P1-10
P1-11
P1-12
Not Used
Not Used
Not Used
}
AC Line Input 85 to 265 Vac, 50 to 60 Hz
2 Amp
OMDC-PU-20EQUAD
black
white
red
NC1
C1
NO1
N
L
COM
+5V
S1
S2
NC2
C2
NO2
Not Used
Not Used
Not Used
brown
or equivalent
Conveyor Oven Time Monitor with Over-Heating Alarm
Heat Source
Tach
Ite
m
ValuPage
TAC HO M ET ER
ENTER
18:40
ON
OFF
0
10
4
6
8
2
253G or other Motor Control
Tunnel Oven
OMDC-PU-20E
or equivalent
Non-Reduced
Shaft
Gear Motor
Coupling to
Chain Drive
Connect to
Coupling
OMDC-DM8000 Meter
Description:
An oven monitor displaying the “tunnel” time in minutes and seconds. The tunnel time is defined as the time it takes
for the heated object on the conveyor to travel from point A to piont B in the application diagram below. A visual indicator
should activate if the tunnel time rises above a preset imit of 22 minutes and 30 seconds which could cause overheating of
the processed material. The indicator should automatically reset when the tunnel time returns to the normal operating range.
For ease of use, the display should be averaged over a period of 1 second.
A B
Drive Train Specs:
1250 RPM at non-reduced motor shaft equates
to 9 minutes and 15 seconds of tunnel time
WIRING DIAGRAM
PARAMETER CONFIGURATION
PARAMETER VALUE NOTES
10 5 Up/down counter mode
20 35 Because the initial values were 40 revolutions per 3.5" of platform motion, each is
21 400 In count mode, the reference RPM is set in revolutions. 400 has been entered here
22 10 Pulses per revolution of shaft encoder or pick-up is 10 PPM
25 3 Decimal point position set to XXX.X on display
multiplied by 10 to give an even number to increase accuracy since the displays
can be programmed in whole numbers. Additionally, because of the decimal point
position, the display reference is multiplied by 10 to generate the proper display
format. Without the second multiplication by 10, the display would only read 3.5"
when the driver motor turned 400 revolutions.
to represent 40 revolutions and the disply reference has also been multiplied by
10 to yeild the whole numbers.
APPLICATIONS
D-3
Page 4
P1-1
P1-2
P1-3
P1-4
P1-5
P1-6
P1-7
P1-8
OMDC-DM8000
P1-9
P1-10
P1-11
P1-12
Not Used
Not Used
Not Used
}
AC Line Input 85 to 265 Vac, 50 to 60 Hz
2 Amp
OMDC-PU-20E or
black
white
red
NC1
C1
NO1
N
L
COM
+5V
S1
S2
NC2
C2
NO2
Not Used
Not Used
Not Used
equivalent encoder
WIRING DIAGRAM
PARAMETER CONFIGURATION
PARAMETER VALUE NOTES
10 2 Time mode setting
20 555 Display should indicate 9:15 (555) when motor at reference RPM, parameter 21.
In time mode, all display values are entered in total number of seconds.
For example, 555 = (9minutes *60 seconds-per-minute) + 15 seconds
21 1250 This is the RPM at which the display reference, parameter 20, should be displayed
22 1 Pulses per revolution of shaft encoder or pick-up is 1 PPM
24 1 Display filtering/averaging set to 1 second
40 4 Alarm active when display value is above upper limit
41 1 Constant alarm output with automatic reset
43 1 Flash display when alarm output is active
48 1350 Upper limit setting for 22 minutes and 30 seconds. In time mode, all limits are
entered in total number of seconds.
For example, 1350 = (22 minutes *60 seconds-per-minute) + 30 seconds
To Order (Specify Model Number)
MODEL NO. PRICE DESCRIPTION
OMDC-DM8000 $335 Digital tachometer with alarm relay output
OMDC-DM8000-R 355 Digital tachometer with 2 alarm relay outputs
OPTIONAL SPEED SENSORS
MODEL NO. PRICE DESCRIPTION
OMDC-PU-20E $114 Shaft-mounted NPN pickup sensor, 10 pulses per revolution
OMDC-PU-40E 114 Shaft-mounted NPN pickup sensor, 20 pulses per revolution
OMDC-PU-20EQUAD 175 Shaft-mounted NPN quadrature pickup sensor, 10 pulses per revolution
Comes complete with panel-mount hardware and operator’s manual.
Ordering Example: OMDC-DM800, digital tachometer with alarm relay output, $335.
D-4
AVAILABLE FOR FAST DELIVERY!
Page 5
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