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D Series Features

Easy-to-setup and program
Universal Inputs/Outputs
NEMA 4X (REX-D100 only)
Dual Set Points
Digital Communications (Optional)

Two Set Points
The D Series has two independent set points. Both set point values can be programmed from the front keypad. However, the second set point is accessed by a set of dry contacts wired to the rear terminals. This is ideal for a run and idle condition for standby or batch processes.

Ramp-to-Set Point
The D Series has standard ramp-up and ramp-down to set point features. This is a linear ramp in percent or degrees per second or minute (optional on D100).

Wide Supply Voltage Range
The D Series can be operated from 90~264VAC (50/60 Hz) power supply. As an option, 24VAC or 24VDC are available.

UL Recognized
The D Series instruments are UL Recognized.

CSA Certified
The D Series instruments are CSA Certified.

CE Mark
The D Series instruments hold the CE Mark.

ASIC
Application Specific Integrated Circuit for optimum control.

Surface Mount Technology
For greater reliability, D Series instruments are manufactured using surface mount technology on the printed circuit board instead of through-hole technology.

Advanced Fuzzy Logic (Optional)
D Series controllers feature an advanced fuzzy logic inference algorithm that not only suppresses and eliminates overshoot on startup or set point change, but also responds quickly to process upsets. Like the other SYSCON-RKC instruments, the D Series has been designed for easy operation without special training. With the new, improved fuzzy logic algorithms, the D Series will provide more stable, accurate control in a wide range of process applications. These controllers also perform conventional PID control and can be easily operated with automatic autotuning which calculates optimum PID constants. The D Series performs PID control with an enhanced fuzzy logic algorithm at a sampling time of 0.5 seconds and an accuracy of 60.3% FS. The D Series provides three levels of operation: set point changes only, tuning parameters such as PID constants, etc., and instrument initialization. The availability of these various levels is useful in suppressing the display of unnecessary setup parameters. Programming functions are easily accomplished through the front panel. The D Series, with its accurate and fast-response, is an excellent choice for temperature and process control applications that require tight tolerances. Applications include processing and manufacturing of the following:

Injection Molding
Extrusion
Furnaces
Ovens
Semi-conductor
Environmental Chambers
PC Board Manufacturing
Food and Beverage
Electronics
Test Stands
Aerospace
Petroleum Processing

Heat/Cool PID Control (Optional)
Heat/Cool PID control is effective for controlling heat-generating processes such as extruders, reactors, etc. The controller can conserve energy by using a deadband function or can perform stable temperature control in processes with large time constants by overlapping the Heat/Cool output. Fuzzy logic is also applied to the Heat/Cool PID algorithm.

Analog Retransmission Output (Optional)
Analog retransmission output enhances system performance. When analog retransmission output is added to the D Series controllers, the process value can be retransmitted as an analog current signal (4~20mA) to a remote instrument such as a recorder or DCS network, etc. Measured, deviation, set, or manipulated output values can be selected.

NEMA 4X (Optional)
For operation in severe environments or when wash-down is required, the REX-D100 controller is available with the NEMA 4X water-proof and dust-proof rating (equivalent to IP65). The standard D Series controller conforms to IP54.

Interface Capability (Optional)
Up to 31 D Series controllers can be connected to one host computer via the RS-485 or RS-422A communication function.

Standard Universal Inputs and Outputs
Forty-four types of thermocouple, RTD, DC voltage and DC current types can be easily selected from the front of the controller. In addition, the controller employs a universal main output (except REX-D100) and cooling output on Heat/Cool type to allow free selection of the relay contact output, voltage pulse output or 4~20mA DC output. For 4~20mA DC current input option and externally-mounted KD100-55 250V shunt resistor is required.

Alarms
Temperature Alarms
The D Series can have two independent alarm contacts that can be easily programmed in the field. These relay contacts can be selected to be deviation alarms, process alarms or a set value alarm.

Heater Break Alarm (HBA)
HBA detects failures in the heater output circuit. The HBA is able to detect these failures by monitoring the load current through the use of an external current transformer. The control will close the alarm contact when the load current falls below a threshold value that has been set by the operator. The D Series can be used on a single phase or three phase WYE or Delta heater circuit. For more information, refer to the HBA section of Control Theory.

Loop Break Alarm (LBA)
The LBA monitors and protects an entire temperature control system. LBA can detect heater breaks, thermocouple or RTD failures, short circuits or the failure of an operating device such as a mechanical relay, mercury relay or a SSR.

Alarm Hold Function
The D Series can be set to mask alarms on start-up. Thus, in cases where a low alarm is used, additional logic is not required for machine start-up. An example of this application would be when it is necessary to shut equipment off in low temperature conditions.

Alarm Delay
The alarm delay function is used to delay the alarm action. If the alarm state is released during this delay period, the alarm output will not be activated. External disturbances such as noise may cause a momentary increase of a process value into the alarm area. The alarm delay function prevents alarm output in these cases. (Setting range: 0~600 seconds).