
 
 4 AB-6650 
Specifications 
Controller (main unit) (1/2) 
Item Specification 
Rated voltage 100 V AC to 240 V AC at 50 Hz/60Hz 
Operating voltage 85 V AC to 264 V AC 
Power supply 
Power consumption 10 VA or less 
Ambient temperature -20 °C to 50 °C 
Ambient humidity 10 %RH to 90 % RH (Non-condensing) 
Rated 
operating 
conditions Vibration Max. 5.9 m/s2(0.6 G) at 10 Hz to 150 Hz 
Ambient temperature -20 °C to 60 °C 
Ambient humidity 5 %RH to 95 % RH (Non-condensing) 
Vibration for transport Max. 5.9 m/s2(0.6 G) at 10 Hz to 150 Hz 
Environmental 
conditions 
Transport / 
storage 
conditions 
Vibration for storage Max. 9.8 m/s2(1 G) at 10 Hz to 150 Hz 
Power supply (‘power’) Green LED ON: Power ON, OFF: Power OFF 
Operation standby (‘standby’) Green LED ON: 
Operation in standby state (DI contact is open.) 
Blow-down operation 
(‘blowdown’) 
Green LED ON: Cooling water being blown down 
Temperature control outputs 1 
and 2 
(‘do1(temp)’ and ‘do2(temp)’)*1
Green LED ‘do1(temp)’ or ‘do2(temp)’ ON: 
Temperature control DO contact is closed. 
Alarm (‘alarm’) Red LED ON: Alarm output (DO) contact is closed. 
PV and SP (‘pv’ and ‘sp’) Orange LED ‘pv’ or ‘sp’ ON: Process value or setpoint is indicated.
Control data 
(window for 7-segment LEDs) 
Red 7-segment LEDs: control data is indicated (to set or to display).
LED 
operations 
Indication 
Units (‘mS/m’ and ‘°C’) Orange LED ‘mS/m’ or ‘°C’ ON: mS/m or °C is indicated. 
Weight Approx. 500 g 
Material / color Polycarbonate resin / light gray 
Power supply terminals M3.5 screw terminal connectionTerminal connection 
Terminals except power supply Quick-fit screwless (clamp) terminal connection 
Conductivity measuring range Changeable between: 
0 mS/m to 200 mS/m and 0 mS/m to 400 mS/m ranges 
Interlock input 
(When DI contact is open) 
Potential free contact input 
Rating: Max. 10 V DC, 5 mA 
Temperature control set to N.O. : 
Temperature control is stopped by opening DO contact. 
Temperature control set to N.C.: 
Temperature control is continued. 
Cooling water blow-down valve output: Valve is fully closed. 
Control output Rating: 100 V AC / 240 V AC, 3 A (cos φ= 0.4) 
- Cooling water blow-down valve: 
Potential free N.O./N.C. contact (SPDT) 
- Alarm output contact: Potential free N.O. contact (SPST) 
- Temperature control output contacts 1 and 2 (optional) 
Potential free N.O. contacts (SPST) 
Conductivity 4 mA DC to 20 mA DC (0 mS/m to 200 mS/m or 0 mS/m to 400 
mS/m), 300 Ωor lower load resistance 
Measuring (PV) output 
(AO signals are isolated from 
power supply.) Temperature 4 mA DC to 20 mA DC (0 °C to 50 °C), 300 Ωor lower load resistance
Conductivity 10 mS/m to 200 mS/m (200 mS/m range) or 
20 mS/m to 400 mS/m (400 mS/m range) 
Measuring range to display 
Temperature 0 °C to 50 °C 
Conductivity For 20 mS/m to 200 mS/m or 40 mS/m to 400 mS/m and 25 °C, 
Control accuracy: ±4 %FS 
Measuring output: ±5 %FS 
Ambient temperature effect: ±0.2 %/°C Tc*2
Accuracy 
Temperature Control accuracy: ±0.5 °C 
Measuring output: ±1.0 °C 
Ambient temperature effect: 0.02 °C/°C Tc*2
Notes: 
∗1 LEDs for temperature control ouputs 1 and 2 are equipped depending on the models. 
(do1(temp) LED is equipped with Model R7010W1X01, do1(temp) and do2(temp) LEDs are equipped with Model R7010W1X02.) 
∗2 Tc: Temperature of the controller