Datasheet DMS-20PC-0-5-5RS, DMS-20PC-0-5-5RL, DMS-20PC-0-5-5RH, DMS-20PC-0-5-5GS, DMS-20PC-0-5-24RL Datasheet (DATEL)

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DMS-20PC-0/5
0-5V and 0-10V Input
3½ Digit, LED Display
Process Control Monitors
Actual Size
••
••
Accepts 0-5V and 0-10V inputs
••
••
••
••
Choice of 5 LED power/color options
••
••
High input impedance, 100k
ΩΩ
ΩΩ
••
••
+5V to +40V model draws 9mA typ.
••
••
Miniature size: 1.38" x 1.25" x 0.95"
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High-quality, 20-turn, span (gain) and zero (offset) adjustments
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DIP-switch selectable range and decimal points
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Vibration-resistant package; Reliable screw-terminal input connections
••
••
Hundreds of different input/readout combinations
Features
Figure 1. DMS-20PC-0/5 Simplified Schematic
DATEL's DMS-20PC-0/5 Series are the world's smallest, full-featured, 0-5V input process control monitors. Their large, easy-to-read, 0.37"/9.4mm LED displays are available in a choice of 4 LED color/intensity options: standard red, standard green, super-bright red, and low-power red. Two power supply input ranges are also available: the industr y-standard +5V and a wide-range +5V to +40V (which typically draws 9mA at +24V).
Gain (span) and offset (zero) adjustments are performed with on-board, precision, 20-turn potentiometers. All decimal-point and range-change selections are made on an 8-position, vibration-resistant, gold-plated DIP switch. Unlike competitive meters, there are no jumpers or solder gaps to open or close, and to further enhance reliability, the entire assembly utilizes 100% soldered connections. Both power-supply and input-signal connections are made via reliable screw-type terminal blocks.
The DMS-20PC-0/5's DIP switch and potentiometers accommodate hundreds of input-voltage/output-reading combinations. This practically eliminates the need for more costly, long-lead-time, factory "specials" in applications which use several different-range meters. An accessor y bezel assembly––featuring metal fasteners and a rubber gasket––simplifies panel mounting and also provides excellent resistance to environmental dust and moisture. All these outstanding features combine to make the DMS-20PC-0/5 the perfect meter for prototype and OEM, 0-5V input, process control monitoring.
DATEL, Inc., Mansfield, MA 02048 (USA) • Tel: (508)339-3000, (800)233-2765 Fax: (508)339-6356 Email: sales@datel.com • Internet: www.datel.com
®®
DP3DP2
DP1
+V
TB2
DMS-20PC-0/5
Signal Input
+
TB1
V
+
Zero
Adjust
R3
R7
Gain Adjust
Band-Gap Reference
Circuit
HI LO
+5V –5V
3½ Digit
A/D Converter
+5V
–5V
DIP Switches
+5V
DC/DC
Converter
Power Supply Input
DATA
–5V
N.C.
N.C.
ON
1
2345
678
12 12
www.datel.com
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DMS-20PC-0/5
0-5V INPUT, 3½ DIGIT, LED DISPLAY PROCESS CONTROL MONITORS
Ordering Information
DMS-20PC-0/5-5RS +5V supply, standard-intensity red LED's DMS-20PC-0/5-5GS +5V supply, standard-intensity green LED's DMS-20PC-0/5-5RL +5V supply, low-power red LED's DMS-20PC-0/5-5RH +5V supply, high-intensity red LED's DMS-20PC-0/5-24RL +5V to +40V supply, low-power red LED's DMS-BZL3 Bezel assembly DMS-BZL4 Bezel assembly with sealing gasket DMS-20-CP Panel cutout punch
Note: Standard panel-mount applications MUST use either DMS-BZL3 or DMS-BZL4 bezel assemblies. See Mechanical Specifications section for cutout/drill dimensions.
As shipped, the DMS-20PC-0/5 is factory calibrated to read "000" for a 0.0V input and "1999" for a 5.0V input. The following worst-case procedure assumes the DMS-20PC-0/5 is com­pletely mis-adjusted, i.e., both potentiometers and the DIP switches are randomly set.
1. Set R7 (full scale span/gain adjust) and R3 (zero/offset adjust) fully clockwise, roughly 22 turns, and place SW1­SW8 to OFF (down position).
2. Select DIP switch setting #1 in Table 1.
3. Apply a precision 0.0V input and adjust R3 until the meter's
display reads "000".
4. Apply a precision 5.0V input and adjust R7 until the meter's display reads "1999". Repeat steps 3 and 4 to make sure the adjustments do not affect one another.
5. Select the appropriate decimal point by setting SW6, SW7 or SW8 to ON (DP1, DP2 or DP3 respectively).
NOTE: The "000" to "1999" display readings referred to in the instructions above are for illustrative purposes only. If other display readings such as "000" to "1200" are desired, refer to the DIP-Switch Settings Tables for SW1-SW4 settings. (SW5 is reserved for future use, it has no affect on display operation.) The initial setting of R3 and R7 fully clockwise is recommended in the adjustment procedure for all the following examples.
Operating and Setup Instructions
The DMS-20PC-0/5 can also be used in most 0-10V applications. See the section on 0-10V inputs for more information. See Note 3 on Table 1.
INPUT LO (TB1 "–LO") is internally connected to the power return (TB2 "–V"). Overvoltage specifications apply to the INPUT HI (TB1 "+HI") connection.
T echnical Notes
1. Input Configuration: The DMS-20PC-0/5 has its input low terminal
(TB1 "LO") internally connected to the power supply ground terminal (TB2 "–V"). This connection effectively places the meter's input in a single-ended configuration. In some applications, single-ended inputs can cause ground-loop induced errors (the meter's display becomes unstable or bounces). This occurs because the LED drive currents flow through both the –V terminal and the signal LO terminal.
If suspected ground-loop errors are encountered, and the input signal LO terminal is externally connected to –V somewhere else in the system, try removing the connection to TB1 "LO". Inputs which have no ground-return connection to –V (commonly referred to as "floating inputs") must have their most negative potential tied to TB1 "LO". Please consult DATEL for more information.
Applications which require electrical isolation between the input signal source and the system power supply must use a separate transformer-isolated supply to power the meter.
2. Panel Mounting: In most standard through-the-panel installations, the DMS-20PC-0/5 must be secured to the panel with either DMS­BZL3 or DMS-BZL4 optional bezel assemblies (see the Mechanical Specifications section and the Ordering Guide for more information). The metal retaining clip supplied with other DMS-20 Series meters CAN NOT be used to support the DMS-20PC-0/5.
Performance/Functional Specifications
Typical at TA = +25°C, unless otherwise noted.
Input Min. Typ. Max. Units Full Scale Input Range
4.9 5.0 5.1 Volts
Input Impedance 100 -- 140 k
Overvoltage Protection
-- -- ±4 0 Volts
Performance Sampling Rate 2.5 samples per second Accuracy (1 minute warm-up) ±0.05%FS ±1 Count Temperature Drift (0 to +60°C) ±0.15 ±0.3 C nts / °C Display Display Type and Size Digit LED, 0.37"/9.4mm high Polarity Indication "–" for negative readings Overrange Indication "–1_ _ _ " for negative inputs
"1_ _ _ " for positive inputs
Physical/Environmental Operating Temperature 0 +60 ° C Storage Temperature 40 +75 °C Humidity (Non-condensing) 0 95 % Case Material Polycarbonate Weight 0.6 ounces (17 grams)
Power Supply Requirements DMS-20PC-0/5-5RS +4.75V to +5.25V at 90mA max. DMS-20PC-0/5-5GS +4.75V to +5.25V at 120mA max. DMS-20PC-0/5-5RL +4.75V to +5.25V at 15mA max. DMS-20PC-0/5-5RH +4.75V to +5.25V at 90mA max. DMS-20PC-0/5-24RL +4.75V to +40V at 15mA max.
2
Order on-line at www .datel.com
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3
DMS-20PC-0/5
0-5V INPUT, 3½ DIGIT, LED DISPLAY PROCESS CONTROL MONITORS
DMS-20PC-0/5
Display Reading SW1 SW2 SW3 SW4
0.0V Input 5.0V Input
1. 000 1200-1999 Of f Of f Of f Of f
2. 000 700-1200 O n Of f Of f Of f
3. 000 400-700 Of f On Of f Of f
4. 000 300-400 Of f Of f On Of f
5. 000 190-300 Of f On On Of f
6. 000 120-190 Of f Of f On On
7. 000 100-150 O ff On On On
8. 000 90-140 On On On On
Table 1. 0-5V DIP-Switch Settings
The DMS-20PC-0/5 is optimized for handling 5V signal ranges that are positioned between –0.1V and +6.0V. As such, input ranges can be anywhere between –0.1V to +4.9V and +1.0V to +6.0V as long as their full range is 5 Volts. The meter's zero/offset potentiometer (R3) has enough adjustment range to produce a "000" display reading for input signal levels between –0.1V and +1.0V.
Please note the DMS-20PC digital panel meter from which the DMS­20PC-0/5 is derived has an accuracy specification of ±2 counts (max.). Thus, it may not always be possible to obtain the exact desired display readings.
1. Desired display readings are:
0.0V input = "0.00"
5.0V input = "6.00"
Use DIP-switch setting #3 in Table 1 and enable decimal point DP2 via SW7. Apply 0.0V and adjust R3 so the display reads "0.00". Apply 5.0V and adjust R7 so the display reads "6.00".
2. Desired display readings are:
0.0V input = "000"
5.0V input = "800"
Use DIP-switch setting #2 in Table 1. Apply 0.0V and adjust R3 so the display reads "000". Apply 5.0V and adjust R7 so the display reads "800". For these display readings, no decimal points are used. Set SW6, SW7 and SW8 to OFF.
3. Desired display readings are:
0.0V input = ".000"
5.0V input = ".250"
Use DIP-switch setting #5 in Table 1 and enable decimal point DP1 via SW6. Apply 0.0V and adjust R3 so the display reads "000". Apply 5.0V and adjust R7 so the display reads ".250".
Examples (0-5V Inputs)
While the DMS-20PC-0/5 is optimized for operation with 0-5V inputs, its versatile input stage can also accommodate most 0-10V applications. The meter's zero/offset potentiometer (R3) has enough adjustment range to produce a "000" display reading with input signal levels between –0.1V and +1.0V. Table 2. summarizes the available ranges when the DMS-20PC-0/5 is used with 0-10V inputs.
0-10V Inputs
1. Desired display readings are:
0.0V input = "000"
10.0V input = "500"
Use DIP switch setting #4 in Table 2. Apply 0.0V and adjust R3 so the display reads "000". Apply 10.0V and adjust R7 so the display reads "500".
Display Reading SW1 SW2 SW3 SW4
0.0V Input 10.0V Input
1. 000 1400-1999 On Of f Of f Off
2. 000 800-1400 Of f On O ff O ff
3. 000 600-800 Of f Of f O n Of f
4. 000 380-600 Of f On On O ff
5. 000 240-380 Of f Of f O n O n
6. 000 200-300 Of f O n O n On
7. 000 180-280 On On On On
Table 2. 0-10V DIP-Switc h Settings
Example (0-10V Inputs)
4. Desired display readings are:
1.0V input = "000"
6.0V input = "090"
Even though this input is positioned between +1.0V and +6.0V, it still meets the 5V full scale input range listed in the Functional Specifications section. Use DIP-switch setting #8 in Table 1. Apply
1.0V and adjust R3 so the display reads "000". Apply 6.0V and adjust R7 so the display reads "090". With this type of input, it is advisable to recheck both input levels to be sure the potentiometer settings do not affect one another.
Applications
ON
1
2345
678
ON
1
2
3
4
5
678
ON
1
23
4
5
678
ON
1
2345
678
ON
1
2
3
4
5
678
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DS-0391 Rev . A 05/99
DMS-20PC-0/5
0-5V INPUT, 3½ DIGIT, LED DISPLAY PROCESS CONTROL MONITORS
Mechanical Specifications
MECHANICAL DIMENSIONS: Inches (mm) TOLERANCES: 2 PL DEC ±0.02 (±0.51)
3 PL DEC ±0.010 (±0.254)
WIRE SIZE: 18 to 26 AWG
(Solid or stranded)
STRIPPING LENGTH: 0.20" (5.08mm)
#2-56 INSERT
0.156 (3.96) DEEP
FRONT VIEW
1.280
(32.51)
0.187 (4.75)
OPTIONAL BEZEL (DMS-BZL3 and DMS-BZL4)
RECOMMENDED DRILL AND PANEL CUTOUT DIMENSIONS
1.826 (46.38)
0.838
(21.29)
1.336 (33.93)
1.626 (41.30)
1.07
(27.18)
INTERNAL CORNER RADII:
0.032 (0.81) MAX.
0.145 (3.68)
0.093 (2.362) DIAMETER (4 REQUIRED) ONLY WHEN USING OPTIONAL BEZEL ASSEMBLY
0.116 (2.95)
®®
BEZEL INSTALLATION
BEZEL
PANEL
Front View
DP2
(SW7)
DP3
(SW8)
DP1
(SW6)
DATEL, Inc. 11 Cabot Boulevard, Mansfield, MA 02048-1151 Tel: (508) 339-3000 (800) 233-2765 Fax: (508) 339-6356 Internet: www.datel.com Email: sales@datel.com Data sheet fax back: (508) 261-2857
DATEL (UK) LTD. Tadley, England Tel: (01256)-880444 DATEL S.A.R.L. Montigny Le Bretonneux, France Tel: 01-34-60-01-01 DATEL GmbH München, Germany Tel: 89-544334-0 DATEL KK Tokyo, Japan Tel: 3-3779-1031, Osaka Tel: 6-354-2025
DATEL makes no representation that the use of its products in the circuits described herein, or the use of other technical information contained herein, will not infringe upon existing or future patent rights. The descriptions contained herein do not imply the granting of licenses to make, use, or sell equipment constructed in accordance therewith. Specifications are subject to change without notice. The DATEL logo is a registered DATEL, Inc. trademark.
®®
ISO 9001
ISO 9001
REGISTERED
0.80
(20.3)
0.040 (1.02)
1.30
(33.0)
1.38
(35.1)
0.88
(22.4)
0.95
(24.1)
MADE IN US A
DMS-20PC-0/5
®®
1.25
(31.8)
0
.040
(
1.02)
0.040
(1.02)
0.44
(11.2)
TYP.
R3
12
1
+
R7
+
ON
1
234
56
7
8
+ – + –
Back View
DIP
Switches
Zero/Offset
Adjust
Gain/Span
Adjust
TB1
Signal
Input
TB2
Power
Input
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