MODEL: W2RS

W2RS SPECIFICATIONS

ES-5513 Rev.17 Page 3/4

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

Cu INPUT

■ INPUT

• Sensing current (resistance span):

140 Ω ≤ Span ≤ 300 Ω : 1 mA

12 Ω ≤ Span < 140 Ω : 2 mA

8 Ω ≤ Span < 12 Ω : 3 mA

3.5 Ω ≤ Span < 8 Ω : 5 mA

• Max. leadwire resistance:

200 Ω or the value calculated using the equation below,

whichever is smaller.

Leadwire resistance(Ω) = (2500 - 100% resistance(Ω) ×

Sensing current(mA)) ÷ (3 × Sensing current(mA))

• Usable range:

3.5 Ω ≤ Resistance span(Ω) ≤ 300Ω

100 % resistance(Ω) ≤ (2500 – 3 × Leadwire resistance (Ω)

× Sensing current (mA)) ÷ Sensing current (mA)

■ PERFORMANCE

• Accuracy

Resistance span ≥ 20 Ω: ±0.2 %

Otherwise use the equation below:

Accuracy(%) = 0.02(Ω) ÷ Resistance span(Ω) × 100 +

0.1(%) × 40(mV) ÷ (Resistance span(Ω) × Sensing

current(mA))

• Temperature coefficient

Resistance span(Ω) × Sensing current(mA) ≥ 40(mV):

±0.015 %/°C

Otherwise use the equation below:

Temperature coefficient(%/°C) = 0.015(%/°C) × 40(mV) ÷

(Resistance span(Ω) × Sensing current(mA))

STANDARDS & APPROVALS

EU conformity:

EMC Directive

EMI EN 61000-6-4

EMS EN 61000-6-2

Low Voltage Directive

EN 61010-1

Installation Category II

Pollution Degree 2

Input or output 1 or output 2 to power input:

Reinforced insulation (300 V)

Input to output 1 to output 2: Basic insulation (300 V)

RoHS Directive

EN 50581

Approval:

UL/C-UL nonincendive Class I, Division 2,

Groups A, B, C, and D

(ANSI/ISA-12.12.01, CAN/CSA-C22.2 No.213)

UL/C-UL general safety requirements

(UL 61010-1, CAN/CSA-C22.2 No.61010-1)