Complete operator interface, protected by Lexan membrane to guarantee an IP65 faceplate protection level.
Composed of 4 keys, double 4-digit green LED display, 4 red signal LEDs for the 4 relay/logic outputs, and 3 additional LEDs with programmable functions to signal the instrument’s various function states.
The main input for the variable to be controlled is universal and allows the connection of a wide variety of signals: thermocouples, resistance thermometers, thermistors, and normalized linear inputs, all with the possibility of custom linearization set from the faceplate. The input type is selected entirely from the faceplate and requires no external adapter shunts/dividers.
A second auxiliary analog input from the current transformer is available. You can select one of the two presettable setpoints, select Manual-Automatic mode, reset the alarm memory, or enable the hold function by means of the digital input.
The instrument provides up to 4 outputs: relay (5A, 250VAC/30VDC cos = 1) or logic (24V ± 10% (10Vmin a 20mA)).
An analog output in voltage or in current is also available. The functions of each output are freely configurable from the faceplate. In addition to the control and alarm outputs, you can also have outputs that repeat the state of the digital or retransmission input by process variable, setpoint, deviation, alarm trip points, and values acquired via serial line.
An additional output (24VDC, 30mA max.) is available to power outside transmitters.
The serial communication option is RS485, with MODBUS RTU protocol and a maximum speed of 19200 baud (485). The instrument’s entire programming procedure is made easier by grouping the parameters in function blocks (CFG for control parameters, Inp for inputs, Out for outputs, etc.).
The instrument can also select the parameters to be displayed based on its hardware configuration, which automatically hides irrelevant parameters.
The instrument is supplied with an "EASY" configuration calling for just a few parameters (only those pertaining to the model ordered and essential to the controller’s operation). In this way, you just have to set the setpoint and the alarm, then launch self-tuning with the specific button.
For an even simpler configuration, you can use a PC programming kit consisting of a cable and a guided program for the Windows environment (see Technical Data code GF_eXpress).
Universal input configurable from faceplate
Accuracy better than 0.2% f.s. under nominal conditions
Control output: relay, logic, Triac or continuous
Hot/cold function with selection of cooling fluid
3 alarms with completely configurable function
Analog retransmission output
Up to 2 isolated digital inputs with configurable function
Auxiliary input for CT (TA) (50mAac)
Heater break or probe short-circuit alarm
Self-tuning, Auto-tuning, Soft-start, bumpless Man/Auto function
Double set point, set point ramp, timed output function
Optically isolated RS485 serial line. Protocol: GEFRAN MODBUS RTU
Rapid configuration from PC with GF eXpress software