DMR35-DCxA.A01.D04 Page 3 of 8

DMR35-DCxA Series

DMR35 DC Micro and Milli-ammeters

www.murata-ps.com

Mechanical/Environmental

Parameter

Min

Typ.

Max

Units

Operating Temperature

0

50

°C

Storage Temperature

-40

70

°C

Humidity (non-condensing)

0

85

%RH

Sealing (front face, when installed with included gasket)

Splash and dust resistant

Mounting screws (included)

#4-20 0.5” thread forming

Screw Tightening Torque

9 in-lb (1 N-m)

Panel thickness when used with included mounting screws

0.062 in. (1.6mm)

0.25 in. (6.3mm)

Dimensions

See Mechanical Specifications Figure

Weight

2.3 (65)

oz. (g)

OPERATION:

Measurement Type and Capabilities

The DMR35 series of digital micro and milli-ammeters employ a precision ADC and a low-power microcontroller to measure DC current. These meters

provide full-scale measurement ranges spanning 50 microamperes to 1000 milliamperes with extremely low burden voltages. These meters

measurement systems supports a common-mode input voltage range of up to +/-48V with respect to the power supply return (-VS connection),

simplifying high-side, low-side, and negative rail current measurements.

FRONT PANEL & FRONT PANEL LAYOUT AND FUNCTION

Bar-graph Display: The 21 segment bar-graph display responds quickly and smoothly like an

analog meter movement to aid in reading rapidly changing measurements.

Numeric Display: The 3-1/2 digit display provides precise measurements for steady-state and

slowly changing measurement values.

REAR PANEL LAYOUT AND SCREW TERMINAL CONNECTIONS

Four screw terminals are provided for power and measurement connections, as well as a 5-position DIP switch for meter configuration, as described

below.

Rear Layout

Terminal #

Name

Function

1

+VS

Power supply input terminals (9-32 VDC)

2

-VS

3

+I_IN

Current measurement input terminals

4

-I_IN

DIP Switch: Five individual switches support display intensity settings (SW1-SW2) and

measurement range selection (SW3-SW5)

Note: It is important to tighten all screw-terminals to their torque specifications. Proper

tightening will help ensure reliable operation. Applications subject to vibration should use

stranded wire.