Multiloop Controllers

Digital Multiloop Controllers (Temperature Controllers)
MA900 / MA901

  • Measurement accuracy: ±0.3% of displayed value
  • Sampling time: 0.5 sec.
  • 4ch (MA900) or 8ch (MA901) temperature control on one controller
  • Abundant functions such as multi-memory area function, contact input/output, communication
  • Plug-in construction
  • Temperature
  • Multiloop
  • Main features
  • Main specification
  • External dimensions
  • Models

Main features

Maximum 8 channel temperature control is possible in a 96mm square size

Two types; 4ch or 8ch

Panel space requirement is reduced

Maximum 8 types of memory areas

Up to 8 types of parameters of each channel can be registered. This contributes to improve efficiency of production lines and products management.

Parameters covered by Memory area:

Temperature setting, various Alarm setting, PID values, Anti-reset windup (ARW), Overlap/Deadband, Setting change rate limiter, Channel use/unuse

Abundant options

Communication function, alarm function, and digital contact inputs are available.



Main specification

  • Number of inputs: 4 points (MA900), 8 points (MA901)
  • Input type : ※See the Input Range Code for the input range.
    1) Thermocouple: K, J, T, S, R, E, B, N, W5Re/W26Re, U, L, PLII
    2) RTD: Pt100 or JPt100
    3) DC voltage: 0 to 5V dc, 1 to 5V dc, 1-10V dc
  • Sampling time: 0.5 sec. (MA900), 1 sec. (MA901)
  • Measurement accuracy:±(0.3% of displayed value+1 digit) ※Depends on the input and the range.
  • Outputs
    1) Relay contact output: 1a contact
    2) Voltage pulse output for SSR driving: 0/12V dc
    3) Current output: 0 to 20mA, 4 to 20mA dc
    4) Open collector output: Sink type
  • Alarm outputs (Max.3 points): Temperature alarm, Heater break alarm (HBA), Control loop break alarm (LBA)
    ※Alarm 1: Supplied as standard, Alarms 2 and 3: Optional
    ※Alarm 3 on MA900 is available with individual outputs of each channel (except heat/cool type)

<Specification of Options>

  • CT input for Heater break alarm (Max.1 point)
  • Communication: RS-232C / RS-422A / RS-485
  • External contact input (5 points): RUN/STOP switching, Memory area switching (4 points)
    ※For MA901, either Heater break alarm or Communication/Digital input must be specified.

<General Specification>

  • Power supply voltage (Rating): 100 to 240V ac/24V ac/24V dc
  • Ambient temperature: 0 to 50°C
  • Weight: Approx.560g
  • Safety standards :UL UL61010-1

cUL CAN/CSA-22.2 NO.61010-1

CE Marking: Low Voltage Directive (LVD)EN61010-1

EMC Directive EN61326-1

RCM EN55011

External dimensions


MA900(4 chanel, 4 chanel heat/cool control)


MA901(8 chanel)