Multi-Loop Digital Temperature Controller MA900 General Description The MA900 controls up to 4 channels in a compact 1/4 DIN size. The MA900 increases zone density and makes smaller numbers of loops affordable, yet still holds many of the advantages that a single loop controller might offer. This unit will aid designers of control equipment by saving labor costs, installation costs, electric panel sizes, and operation costs. A Digital communications A Heat/Cool action A Digital contact input Multiple alarm functions A Close horizontal mounting A IP65 Waterproof/dustproof protection 4 channels Control_ 4 channels of temperature controls are packed into 96 x 96 x 100mm case. The MA900 can reduce your panel cutouts and make your panel board smaller. Digital Communications (Optional) An optional communications interface, RS-232C, RS-422A or RS-485 is available for networking to computers, PLCs and SCADA software. MODBUS or ANSI (RKC standard) protocol can be selected. Up to 31 units can be interfaced on one RS-422A or RS-485 communication line. The Heat/Cool PID control features heat and cool outputs for use where process-generated heat exists. This allows the input of overlap or deadband settings which contribute to energy savings. Up to 8 kinds of combinations of temperature set value, PID constant, alarm set value, etc. for each channel can be registered as "Memory area" (recipe). The change of settings caused by the change of a process and product can be simply realized only by switching the "Area". The switching of the area by optional external contact input is also available. The available parameters for multi memory area : SV, Alarm set values, PID constants, Anti-reset windup, Overlap/dead band, Setting change rate limiter, Channel used/unused Digital Contact Input (Optional) An optional digital contact input is available for RUN/STOP and memory area switching. (RUN/STOP switching can also be completed at the front key panel.)

Multi-Loop Digital Temperature Controller FeaturesMultiple of Alarm Functions The MA900 provides a wide selection of alarm types to configure up to three alarms. Temperature alarms, Loop break alarm, FAIL Alarm 2 (Optional) : Temperature alarms, Heater break alarm, FAIL Alarm 3 (Optional) : Temperature alarms, FAIL Alarm output is common to all channels. But alarm 3 is available for optional independent output for each channel. The MA900 has been designed with a unique mounting bracket that allows close horizontal mounting of multiple instruments to save valuable panel space. Close horizontal...

Multi-Loop Digital Temperature Controller Control Output Relay output : Form A contact, 250V AC 3A (resistive load) Voltage pulse output : 0/12V DC ControlControl Method a) PID control (with autotuning function) •Available for reverse and direct action. (Specify when ordering.) b) Heat/Cool PID control (with autotuning function) •Air and water cooling types are available. (Specify when ordering.) Set value : Same as input range. Heat side proportional band : 1 to span (ON/OFF action when P=0) •Differential gap at ON/OFF action is 2°C (°F) or 0.2%. Cool side proportional band : 1 to 1000% of heat...

Multi-Loop Digital Temperature Controller Type R, S and B input : Accuracy is not guaranteed between 0 to 399°C (0 to 799°F) DC voltage input can be used for the input of 0 to 20mA (in case of 0 to 5V) and 4 to 20mA (1 to 5V) by attaching 250Q shunt resistor (sold separately) to input terminal. (The model of shunt resistor : KD100-55)

Multi-Loop Digital Temperature Controller MA900 1 Loop break alarm is not available for Heat/Cool PID control type. Digital Controller Alarm 2 and 3 Code Table U Code Current transformer for heater break alarm CTL-6-P-N (0 - 30A) Shunt resistor for DC current input KD100-55

Multi-Loop Digital Temperature Controller External Dimensions and Rear Terminals Unit : mm 96 For mounting of the controllers, panel thickness must be between 1 to 10mm. When mounting multiple controllers close together, the panel strength should be checked to ensure proper support.. • Dustproof and waterproof are not effective when controllers are closely mounted. (Close horizontal mounting) • Up to 6 unit • It becomes Cool side output for CH1 to CH4 in Heat/Cool control specification. • It can be used as independent channel output for Alarm 3 in PID control specification. (Specify when ordering)...