MODEL: LDSN

http://www.m-system.co.jp/

LDSN SPECIFICATIONS

ES-1951 Rev.8 Page 1/3

INPUT LOOP POWERED ISOLATOR

(super-miniature size)

Functions & Features

• Loop-powered design eliminates output loop power supply

• 500 V DC input-to-output isolation

• 350 Ω output drive with 4 – 20 mA

Typical Applications

• Isolation between control room and field instrumentation,

between telemetering system and input device

• Eliminates ground problems in existing systems thanks to

easiness of application without requiring additional power

wiring

• Can be used as field-I/O terminals

60

(2.36)

44 (1.73)

46

(1.81)

mm (inch)

MODEL: LDSN–[1][2][3]

ORDERING INFORMATION

• Code number: LDSN–[1][2][3]

Specify a code from below for each [1] through [3].

(e.g. LDSN-A6/D/Q)

• Specify the specification for option code /Q

(e.g. /C01/S01)

[1] INPUT

Current

A: 4 – 20 mA DC

H: 10 – 50 mA DC

[2] OUTPUT

Current

A: 4 – 20 mA DC

Voltage

6: 1 – 5 V DC

[3] OPTIONS (multiple selections)

Mounting

blank: Surface

/D: DIN rail

Other Options

blank: none

/Q: Option other than the above (specify the specification)

SPECIFICATIONS OF OPTION: Q (multiple selections)

COATING (For the detail, refer to M-System's web site.)

/C01: Silicone coating

/C02: Polyurethane coating

/C03: Rubber coating

TERMINAL SCREW MATERIAL

/S01: Stainless steel

GENERAL SPECIFICATIONS

Construction: Stand-alone; terminal access at the front

Connection: M4 screw terminals (torque 1.2 N·m)

Screw terminal: Nickel-plated brass (standard) or stainless

steel

Housing material: Flame-resistant resin (black)

Isolation: Input to output

Zero adjustment (front)

Voltage output: -5 to +5 %

Current output: -0.5 to +0.5 %

Span adjustment (front)

Voltage output: 95 to 105 %

Current output: 98.5 to 101.5 %

INPUT & OUTPUT

■ Input 4 – 20 mA DC / Output 1 – 5 V DC

Equivalent input impedance: Approx. 250 Ω with 20 mA

input

Operational range: 3 – 22 mA DC

(Accuracy is assured within 4 – 22 mA)

Load resistance: ≥ 50 kΩ

■ Input 10 – 50 mA DC / Output 1 – 5 V DC

Equivalent input impedance: Approx. 100 Ω with 50 mA

input

Operational range: 7 – 55 mA DC

(Accuracy is assured within 8 – 55 mA)

Load resistance: ≥ 50 kΩ

■ Input 4 – 20 mA DC / Output 4 – 20 mA DC

Equivalent input impedance: 230 Ω plus load resistance with

20 mA input

Operational range: 3 – 22 mA DC

(Accuracy is assured within 4 – 22 mA)

Load resistance: 50 – 350 Ω (min. 50 Ω required for

adequate operation)

■ Input 10 – 50 mA DC / Output 4 – 20 mA DC

Equivalent input impedance: 90 Ω + [load resistance×0.16]

with 50 mA input

Operational range: 7 – 55 mA DC