DATEL DMS-20PC-1-FM-F, DMS-20PC-1-FM, DMS-20PC-2-FM, DMS-20PC-3-FM Datasheet

DA TEL, Inc., Mansfi eld, MA 02048 (USA) • Tel: [phone] Fax: [phone] • Email: [e-mail] • Internet: www.datel.com

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. Specifi cations are subject to change without notice. The DATEL logo is a registered DATEL, Inc. trademark.

®®

DMS-20PC-FM

Self-Powered, 3-Digit, LED

AC Line Frequency Monitors

Features

DS-0387D 02/01

Actual Size

DATEL's new DMS-20PC-FM Series are the world’s smallest, self-pow­ered, ac frequency meters. Simply connect the ac line to the two rear input
terminals, and the unit is fully operational with no additional components or
auxiliary power required! Two, 50/60Hz models operate over input voltage
ranges of 85-140Vac or 170-264Vac. A third, 400Hz model operates over an
input voltage range of 85-140Vac. Despite their small size (1.38" x 0.88" x

1.0"), DMS-20PC-FM meters feature large 0.40"/10.2mm red LED's that can
be easily read from 15 feet away.

An ultra-stable, quartz-crystal-con­trolled, embedded microcomputer pro­vides accuracies of ±0.1Hz (50/60Hz
models) or ±1.0Hz (400Hz model) over
the entire operating temperature range
of –25 to +60°C. Epoxy encapsulated
plastic packages provide excellent
protection against the harsh environ­ments normally encountered by emer­gency backup power generators. DMS­20PC-FM meters are the exact same
size as DATEL's popular AC Line Voltage
Monitors (models DMS-20PC-X-LM).

• Self-powered, no external supplies required

• 3 models: 47.0-99.0Hz (85-140Vac)

47.0-99.0Hz (170-264Vac)
350-450Hz (85-140Vac)

• Screw terminals simplify panel mounting

• Ideal for emergency power equipment

• Small 1.38" x 0.88" x 1.0" packages

• Epoxy encapsulated for harsh environments

• Large (0.40"/10.2mm) red LED displays

Ordering Information

DMS-20PC-1-FM 47.0-99.0Hz/120Vac frequency monitor
DMS-20PC-1-FM-F "-1" models with blade terminals
DMS-20PC-2-FM 350-450Hz/120Vac frequency monitor
DMS-20PC-3-FM 47.0-99.0Hz/220Vac frequency monitor
DMS-20-CP Panel cutout punch
DMS-BZL3 Panel mount bezel
DMS-BZL4 Panel mount bezel with sealing gasket

Mechanical Specifi cations

Dimensions in inches (millimeters)
Tolerances: 2 PL Dec ±0.02 (±0.51)
3 PL Dec ±0.010 (±0.254)
Recommended panel cutout dimensions:

1.336 (33.93)W × 0.838 (21.29)H
Internal corner radii 0.032 (0.81) Max.

Input

Freq. Range (Voltage Range): ➀

DMS-20PC-1-FM 47.0-99.0Hz (85-140Vac)
DMS-20PC-2-FM 350-450Hz (85-140Vac)
DMS-20PC-3-FM 47.0-99.0Hz (170-264Vac)
Current Consumption 50mArms (max.)

Overvoltage Protection:
DMS-20PC-1/2-FM 200Vrms (max.)
DMS-20PC-3-FM 300Vrms (max.)

Performance

Sampling Rate 4 readings/second
Accuracy (–25 to +60°C):
DMS-20PC-1/3-FM ±0.1Hz
DMS-20PC-2-FM ±1.0Hz

Mechanical

Dimensions 1.38" x 0.88" x 1.00"
Display Type 3 digit, red LED, 0.4"/10.2mm
Weight 1 ounce (28 grams)
Case Material Polycarbonate

Environmental

Operating Temperature –25 to +60°C
Storage Temperature – 40 to +75°C
Humidity (Non-condensing) 0 to 95%

➀ Operation and accuracy at inputs above or below these

ranges are not specifi ed.

Functional Specifi cations

Brass screws (6-32 thread) and a panel-mount retaining clip are
supplied with each meter

DMS-20PC-1-FM-F

(With blade terminals)

DMS-20PC-1-FM

(Panel mount)

0.10
(2.5)

0.75

(19.1)

0.44

(11.2)

0.80

(20.3)

0.04

(1.016)

0.32
(8.1)

1.00

(25.4)

0.44

(10.2)

0.88

(20.4)

1.38

(35.1)

0.04

(1.016)

1.30

(33.0)

0.44

(10.2)

1.63 (41.1)

1.83 (46.5)

0.44

(10.2)

1.07

(27.2)

0.10
(2.5)

#6-32

UNC THD

#2-56 INSERT

0.156 (3.96 DEEP

E156931

Order online at www.datel.com