MODEL: R3-US4

R3-US4 SPECIFICATIONS

ES-8449 Rev.7 Page 2/7

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

Except the case that the input voltage is out of -1.3 to +1.3

V for ±60 mV, ±125 mV, ±250 mV, ±500 mV and ±1000

mV ranges

Input range: See Table 1.

■ Thermocouple

Input resistance: ≥ 600 kΩ

Input range: See Table 2-1 and 2-2. (standard accuracy),

see Table 5 (high accuracy).

Burnout sensing

Upscale: ≤ 130 nA

Downscale: ≤ 220 nA

No burnout: ≤ 10 nA

■ RTD (3-wire)

Excitation: 1.25 V / (1.31 kΩ + load resistance across the

terminals A – C)

Input range: See Table 3 (standard accuracy), see Table 6

(high accuracy).

Allowable leadwire resistance: 20 Ω per wire

■ Potentiometer

Excitation: 1.25 V / (1.31 kΩ + total resistance)

Total resistance: See Table 4.

INSTALLATION

Operating temperature: -10 to +55°C (14 to 131°F)

Operating humidity: 30 to 90 %RH (non-condensing)

Atmosphere: No corrosive gas or heavy dust

Mounting: Installation Base (model: R3-BSx)

Weight: 210 g (0.46 lb)

PERFORMANCE

Conversion accuracy: See Table 1 through 6.

Conversion rate: See Table 1 through 6.

Data range

DC Voltage or potentiometer: 0 to 10000 for input range

Thermocouple or RTD (standard accuracy)

°C, absolute temperature: Engineering unit value × 10

(integer)

°F: Engineering unit value (integer)

Thermocouple or RTD (high accuracy)

°C: Engineering unit value × 100 (integer)

°F: Engineering unit value × 10 (integer)

(Absolute temperature not available for high accuracy)

Data allocation: 4

Current consumption: 60 mA

Cold junction compensation error: ±1.0°C maximum (at

25°C ±10°C); ±1.8°F maximum (at 77°F ±18°F)

(±1.5°C or ±2.7°F for R, S, PR)

Cold junction compensation is not available for B

thermocouple.

Temp. coefficient: See Tables 1 through 6.

Burnout response

Thermocouple K (CA), E (CRC), J (IC), N, L, P (Platinel II):

≤ 20 sec. for upscale

≤ 10 sec. for downscale

RTD or the other thermocouple types: ≤ 10 sec.

Insulation resistance: ≥ 100 MΩ with 500 V DC

Dielectric strength: 500 V peak @ 1 minute (input 1 to input

2 to input 3 to input 4 to internal bus or internal power)

2000 V AC @ 1 minute (power input to FG; isolated on the

power supply module)