DMS-20PC-0/5-5GS - Datel, Inc.

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

••

•

Large, easy-to-read, 0.37"/9.4mm

LED display

••

•

Choice of 5 LED power/color options

••

•

High input impedance, 100k

ΩΩ

Ω

••

•

+5V to +40V model draws 9mA typ.

••

•

Miniature size: 1.38" x 1.25" x 0.95"

••

•

High-quality, 20-turn, span (gain) and

zero (offset) adjustments

••

•

DIP-switch selectable range and

decimal points

••

•

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 wor ld'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

dra ws 9mA at +24V).

Gain (span) and offset (zero) adjustments are perfor med 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 ter minal 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 • Inter net: www.datel.com

®®

DP3DP2

DP1

TB2

DMS-20PC-0/5

Signal Input

–

TB1

–V

–

Zero

Adjust

R3 R7Gain

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.

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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 f actory 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 com-

pletely mis-adjusted, i.e., both potentiometers and the DIP

s witches are randomly set.

1. Set R7 (full scale span/gain adjust) and R3 (zero/offset

adjust) fully clockwise, roughly 22 turns, and place SW1-

SW8 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

➀

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.

➁

INPUT LO (TB1 "–LO") is internally connected to the power return (TB2 "–V").

Overvoltage specifications apply to the INPUT HI (TB1 "+HI") connection.

Technical 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 infor mation.

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 DMS-

BZL3 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

➀

4.9 5.0 5.1 Volts

Input Impedance 100 -- 140 k

Ω

Overvoltage Protection

➀

-- -- ±40 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 Cnts/°C

Display

Display Type and Size 3½ 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.

Order on-line at www.datel.com

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 Off Off Off Off

2. 000 700-1200 On Off Off Off

3. 000 400-700 Off On Off Off

4. 000 300-400 Off Off On Off

5. 000 190-300 Off On On Off

6. 000 120-190 Off Off On On

7. 000 100-150 Off On On On

8. 000 90-140 On On On On

Table 1. 0-5V DIP-Switch Settings ➂

➂

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 DMS-

20PC-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. summari zes 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 Off Off Off

2. 000 800-1400 Off On Off Off

3. 000 600-800 Off Off On Off

4. 000 380-600 Off On On Off

5. 000 240-380 Off Off On On

6. 000 200-300 Off On On On

7. 000 180-280 On On On On

Table 2. 0-10V DIP-Switch 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

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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

F ront Vie w

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, Ger many Tel: 89-544334-0

DATEL KK Tokyo, Japan Tel: 3-3779-1031, Osaka Tel: 6-354-2025

D ATEL 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

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 USA

DMS-20PC-0/5

®®

1.25

(31.8)

.040

(

1.02) 0.040

(1.02)

0.44

(11.2)

TYP.

12 1

+–

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+–+–

Back View

DIP

Switches

Zero/Offset

Adjust

Gain/Span

Adjust TB1

Signal

Input

TB2

Power

Input