ES-8449 Rev.8

R3-US4

Remote I/O R3 Series

UNIVERSAL INPUT MODULE

(4 points, isolated)

MODEL: R3-US4[1][2]

ORDERING INFORMATION

• Code number: R3-US4[1][2]
Specify a code from below for each of [1] and [2].
  (e.g. R3-US4W/A/Q)
• Specify the specification for option code /Q
  (e.g. /C01/SET)
Factory default setting
Input: DC voltage, ±12 V
Temperature unit: °C
Burnout: Upscale
CJC: ON

NO. OF CHANNELS

4: 4

[1] COMMUNICATION MODE

S: Single
W: Dual

[2] OPTIONS (multiple selections)

Temperature input accuracy
blank: Standard
/A: High accuracy
Other Options
blank: none
/Q: Option other than the above (specify the specification)

SPECIFICATIONS OF OPTION: Q

COATING (For the detail, refer to our web site.)
/C01: Silicone coating
/C02: Polyurethane coating
/C03: Rubber coating
EX-FACTORY SETTING
/SET: Preset according to the Ordering Information Sheet
 (No. ESU-8449)

RELATED PRODUCTS

• PC configurator software (model: R3CON)
Downloadable at our web site.
A dedicated cable is required to connect the module to the PC.  Please refer to the internet software download site or the users manual for the PC configurator for applicable cable types.

GENERAL SPECIFICATIONS

Connection
 Internal bus: Via the Installation Base (model: R3-BSx)
 Input: M3 separable screw terminal (torque 0.5 N·m)
 Internal power: Via the Installation Base (model: R3-BSx)
Screw terminal: Nickel-plated steel
Isolation: Input 1 to input 2 to input 3 to input 4 to internal bus or internal power
Input range: Selectable with configuration software (model: R3CON)
Temperature unit (Thermocouple or RTD input): Selectable with PC configuration software (model: R3CON)
Burnout for T/C and RTD input: Upscale, downscale or no burnout selectable with PC configurator software
Select “No burnout” to minimize the measuring errors caused by the sensor/wire resistance and the burnout sensing current. With RTD input, the signal may go transiently to the opposite direction from the burnout setting.
Burnout is not detected at DC voltage or potentiometer input. The burnout sensing current is turned off.
Cold junction compensation (CJC) for T/C input: CJC is selectable whether enabled or disabled by using the PC configurator software. The cold junction sensor is mounted to the terminal of each channel.
A/D conversion mode: (Temp. input accuracy: standard)
Low or middle conversion rate selectable with PC configurator software
RUN indicator: Bi-color (red/green) LED;
Red when the bus A operates normally;
Green when the bus B operates normally;
Amber when both buses operate normally.
ERR indicator: Bi-color (red/ green) LED;
Red with burnout; Green in normal operating conditions.

INPUT SPECIFICATIONS

■ DC Voltage
Input resistance: ≥ 600 kΩ
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)

INPUT TYPE, RANGE,CONVERSION ACCURACY & TEMPERATURE COEFFICIENT

EXTERNAL VIEW

INPUT DATA DESCRIPTIONS

■ UNIVERSAL INPUT DATA (SCALING CONVERSION DATA)
■ UNIVERSAL INPUT DATA (TEMPERATURE DATA)

EXTERNAL DIMENSIONS & TERMINAL ASSIGNMENTS unit: mm [inch]

SCHEMATIC CIRCUITRY & CONNECTION DIAGRAM