DST-2000C
Direction Sensing
Tachometer
INSTRUCTION MANUAL
Azonix-Dynalco, 3690 N. W. 53 Str e et , Ft. Lauderdale, FL 33309 U.S.A.
! (954) 739-4300 • Fax (954) 484-3376
www.dyna lco.c om • mailbox@dynalco.com
October 1999
This document contains information on a new
product. Specifications and information herein are
subject to change without notice. Dynalco Controls
reserves the right to make changes to the equipment
described herein to improve function or design.
Although the information contained in this manual has
been carefully reviewed and is believed to be reliable,
Dynalco Controls does not assume any liability arising
out of the application or use of the equipment
described herein. Warranty is limited and cannot
exceed the price paid for the product upon which the
warranty is based.
DST-2000C and M343, DST-2000B, and M917 are
trademarks of Dynalco Controls.
© 1999 Dynalco Controls
All rights reserved
Printed in U.S.A.
p/n 145F-11647, Rev. 0
2 DST-2000C Instruction Manual
Table of Contents
Overview..............................................................................................................5
1 Product Description.....................................................................................5
1.1 Features.....................................................................................................5
1.2 Functional Description................................................................................5
1.3 Terminal Connections and Dimensions ......................................................6
Figure 1-1 Outline Drawing........................................................................5
1.4 Specifications.............................................................................................6
1.5 Minimum Speed Requirements..................................................................6
Table 1-1
1.6 Tach Tape (TT-100)...................................................................................6
Table 1-2
2 Installation....................................................................................................8
2.1 Tools and Hardware...................................................................................8
2.2 DST-2000C Terminals................................................................................8
2.3 Wiring Connections Between DST-2000C and M343 Connector...............9
2.4 Calibration Procedure.................................................................................9
2.4.1 Required Equipment............................................................................9
2.4.2 Connections........................................................................................9
2.4.3 Calibration.........................................................................................10
Minimum RPM with Gear
Minimum RPM with TT-100
...........................................................6
........................................................6
DST-2000C Instruction Manual
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4 DST-2000C Instruction Manual
DST-2000C INSTRUCTION MANUAL
Overview
The purpose of this manual is to provide the users with the information necessary to
install and operate the DST-2000C™ Direction Sensing Tachometer.
1 Product Description
The DST-2000C operates with the M343 dual output magnetic pickup to detect the
direction of rotation, and provides outputs to indicate direction and speed. (The older
M917 pickup is no longer manufactured. This pickup ONLY works with the DST-2000B.)
1.1 Features
•
Provides two SPDT relay outputs, one energizes on CW rotation, the other on
CCW rotation.
•
Provides two 10 mA drive current outputs to illuminate customer-provided LED
indicators, one for CW rotation, t he other for CCW rotation.
•
Provides two pulsed outputs, one for CW rotation, the other f or CCW rotation,
that can serve as an input signal to Dynalco tachometer DS-800.
•
Provides a 0–1 mA output proport ional to speed that can serve as input sig nal to
Dynalco tachometer models G-101 or DPM-105.
•
Provides an amplified sq uare wave output signal equal to the input frequency to
serve as input signal for Dynalco models SPD-100, SPD-700, LST-100, and
DS-800.
•
Provides a regulated 8 Vdc (25 mA) auxiliary output to power Dynalco digital
panel meter DPM-105.
1.2 Functional Description
The DST-2000C receives two input signals from the Dynalco M343 dual output
magnetic pickup. The cir cuits within the DST-2000C evaluate the two input signals
and activate the appropriate relay (CW or CCW ) to indicate direction of rotat ion.
The DST-2000C output s a proportional 0–1 mA analog signal as well as a buf fered
square wave (8 V peak-to-peak) eq ual to the input frequency. T he DST-2000C also
outputs a 10 mA signal to dr ive external LEDs which indicate the direction of r otat ion
(CW and CCW). Ther e ar e also t wo pulse outputs, one for CW, the other for CCW.
There is one pulse per discontinuity. Pulses are 0 to +8 Vdc, 35 microsecond
nominal width.
To avoid false indications at near zero speed, the act ive relay indicating direct ion will
remain activated for 2 seconds with no signal input. I t will then automatically reset.
DST-2000C Instruction Manual
5
1.3 Terminal Connections and Dimensions
Figure 1-1 Outline Drawing
1.4 Specifications
Input Signal: Signal from Dynalco M343 dual output magnetic pickup only.
Frequency range 0.5 Hz to 20 kHz.
Signal Amplitude: 25 mVrms minimum; 15 Vrm s m a ximum .
Input Power:
*+
115 Vac and/or 12 Vdc (standard)*
115 Vac and/or 24 Vdc (optional)*
230 Vac and/or 12 Vdc (optional)*
230 Vac and/or 24 Vdc (optional)*
10%, 50/60 Hz, +10%, 2 watts maximum
Input Current: 2 watts, maximum.
Operating Temperature: –30
o
F to +160oF (–34oC to +71oC)
Output Relays: Two SPDT relays. Contact rated 5 A, resist ive, 115 Vac.
Remote LED Outputs: Two 10 mA nominal outputs.
Directional Output
Pulses:
Two outputs: one f or CW, one f or CCW. Pulses are 0 t o +8 V,
35 microseconds nominal width.
Speed Signal Output: Proportional to input frequency. Square wave 8 V peak-to-peak.
Meter Output: 0–1 mA analog output proportional to input frequency.
Auxiliary Output Supply: Regulated +8 Vdc (25mA).
6 DST-2000C Instruction Manual
1.5 Minimum Speed Requirements
At very low speeds, the amplitude of t he output signal from the M343 will be below
the sensitivity level of the DST-2000C. At t hese low speeds the DST-2000C will not
be able to detect direction of rot ation. The output amplitude of t he M343 is affected
by the diameter of the gear being sensed and by the air gap between the gear and
the M343. Table 1-1 shows the minimum speed required (in RPM) for the
DST-2000C to detect rotation for a variety of gear diameters at various air gaps.
Gear Dia. 0.005 in. 0.010 in. 0.015 in. 0. 020 i n. 0.030 in. 0.040 in.
in Inches gap gap gap gap gap gap
4
6
8
10
12
14
16
18
20
22
24
30
36
16 27 40 54 89 160
11 18 27 36 59 107
8 14 20 27 45 80
7 11 16 22 36 64
6 9 14 18 30 54
5 8 12 16 26 46
4 7 10 14 23 40
4 6 9 12 20 36
4 6 8 11 18 32
3 5 8 10 17 29
3 5 7 9 15 27
3 4 6 8 12 22
2 3 5 6 10 18
Table 1-1 Minimum RPM with Gear
1.6 Tach Tape (TT-100)
When using Tach Tape (TT-100) on a shaf t, the minimum speeds will be different
than with a gear. Table 1-2 shows the minimum speed req uired to detect r otation f or
a variety of shaft diameters at various air gaps when using TT-100.
Shaft Dia. 0.005 in. 0.010 in. 0.015 in. 0.020 in. 0. 003 in. 0.040 in.
in Inches gap gap gap gap gap gap
4
6
8
10
12
14
16
18
20
22
24
30
36
51 68 84 96 127 192
35 45 56 64 85 129
26 34 43 48 64 97
21 28 34 39 51 77
18 23 29 32 43 65
16 20 25 28 37 55
14 18 22 25 32 49
13 16 19 22 29 43
12 15 18 20 26 39
11 13 16 18 24 35
10 12 15 17 22 33
8 10 12 14 18 26
7 9 10 11 15 22
Table 1-2 Minimum RPM with TT-100
DST-2000C Instruction Manual
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2 Installation
The DST-2000C is supplied in an industrial, painted st eel housing which is designed
to be installed within an enclosure. The DST-2000C can be mounted horizontally or
vertically depending on the specific application conditions. A space of 6¼ X 11¼
inches allows for a minimum 1½ inches of clearance f or ease of access needed for
terminal connections and servicing. The system installation should comply with all
appropriate electrical codes and standards.
2.1 Tools and Hardware Required Tools Required Hardware
Screwdriver Four (4) 10-32 screws
Drill Four (4) #10 lock washers
#21 drill bit
10-32 tap
2.2 DST-2000C Terminals
Terminal Connect To
1 115 Vac (Hot) input or 220 Vac, optional
2 115 Vac (neutral) input or 220 Vac, optional
3 +12 Vdc input or +24 Vdc, optional
4 –12 Vdc (Common) input or –24 Vdc, optional
5 Regulated + 8 Vdc output
6 Square wave freq uency output (Hi)
7 Square wave freq uency output (Lo)
8 No connection
9 Input f r om M343 (White lead from C917-10)
10 Input f r om M343 (Blue lead fr om C917- 10)
11 No connection
12 Input f r om M343 (Gr een lead from C917-10)
13 Input f r om M343 (Brow n lead from C917-10)
14 CCW Relay NO contact output
15 CCW Relay Common output
16 CCW Relay NC contact output
17 CW Relay NO contact output
18 CW Relay Common output
19 CW Relay NC contact output
20 Anode for exter nal LED out put
21 Cathode for CW LED output ( 10 m A)
22 Cathode for CCW LED output ( 10 mA)
23 0–1 mA meter output (+)
24 0–1 mA meter output (–)
25 CW +8 V, 35 microsecond, pulse output
26 CCW +8 V, 35 microsecond, pulse output
8 DST-2000C Instruction Manual
2.3 Wiring Connections Between DST-2000C & M343 Pickup Connector
Wiring connections between the DST-2000C and the M343 magnetic pickup
connector C917-X (X = length of connector cable in inches) are as follows:
2.4 Calibration Procedure
The only calibration to the DST-2000C recom mended by the factory is calibration of
the 0–1 mA Meter Output. {Note: The two potentiom eters on the bottom of the PC
board are factory adjustments only and no user adj ustment should attempted.}
2.4.1 Required Equipment
• Dynalco F-16 Frequency Generator or similar square w ave generator
• Dynalco G-101 meter or digital voltm eter
• Dynalco isolation transformer p/n 260C- 6495
2.4.2 Connections
• Connect the G-101 t o t he met er out put ter minals of the DST - 2000C: ter minals
23 (+) and 24 (–).
• Connect the F-16 signal generator to the DST-2000C terminals 9 (+) and 10
(–).
• Connect the red lead of the 260C-6495 transformer to terminal 9 of the
DST-2000C and the yellow lead to terminal 10.
• Connect the white lead of t he 260C-6495 transformer to terminal 12 and the
black lead to terminal 13 of t he DST-2000C.
DST-2000C Instruction Manual
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2.4.3 Calibration
• Turn the F-16 power on and verify the Count/Generate switch is in the
Generate position.
• Adjust the F-16 to t he full-scale frequency as required by the application. T o
compute the full-scale frequency, multiply (the number of discontinuities
sensed) by (the maximum speed) and divide by 60.
Hertz (frequency) = Number of Gear Teeth X RPM divided by 60
• Connect power source to DST-200C
• Turn power on to the DST-2000C.
• Verify that the CW relay energizes.
• Adjust the meter output potentiometer to obtain full-scale deflection on the
G-101 or 5 Vdc on digital voltmeter.
• Reverse the connections of the white and black leads of the transformer and
verify the CCW r elay energizes and the CW relay de-energizes.
• Turn the F-16 power off and verify that the CCW relay de-energizes after
approximately 2 seconds.
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