RICALC

Hydrological

Processung Unit

Short Description

This unit is a multifunctional processor specifically designed to process calculations. Through the use of various input and output signals, a wide range of applications can be accommodated. Programming is facilitated by 4 membrane keypads and an 8 digit LED display mounted on the front panel. Inputs can include but are not limited to, measured values, constants or interim values. Calculations can be done using two of the inputs to produce a value.

2 Analog inputs 0/4...20mA
2 Analog outputs 0/4..20 mA
2 RS 232 interfaces
1 SPlbus interface to RISONIC
2 Pulse outputs
5 Limit switches
Easy operaion by matrix structure
PC parameterisation as standard

Advantages

Addition / Subtraction / Multiplication / Division / Power / Absolute value / Integration / Differentiation
Look-up table with up to 30 programmable points ( for instance to calculate a volume)
Flow measurement calculation is done by differential pressure
Complex functions are obtained by using interim values and cascading several RICALC units together
8 digit LED display and 4 front keys for interactively entering system parameters
Programmable in English / German / French / Italien / Spanish
Self Diagnostic
Technical data

Power supply :	24 V DC +-20%
Power consumption :	< 2.5W
Electrical insulation :	AC 500Veff, 50 Hz, 1 min. (Power supply to in-/outputs)
Overvoltage protection :	Fine protection built in Coarse protection optional
Design :	Plug-in Eurocard
Size :	3 Height units (128mm) 12 Width units (61mm)
Display :	LED-display with 8 Characters
Status :	8 LED (1 OK, 2 Pulse, 5 limit values)
Operation :	Matrix structure in 5 langues
Keyboard :	4 pressure point keys
Operating temp. range :	-25°C..+70°C ( -13°F..158°F)
Temperature influence :	typ. 37 ppm/°C
Humidity :	0..70 % rel. humidity
Protection class :	IP20

Analog inputs : Load :	Two 0..20 mA or 4..20 mA 81 Ohm ± 10%
Analog outputs max Load :	Two 0..20 mA or 4..20 mA 500 Ohm
Relay outputs : Turn-on voltage : Switching current :	1 OK (status) 2 Pulse outputs (switching contacts) 5 Limit switches ( 6 different functions with delay available) 60 V < 0.5 A
RS 232 interface : max.length : Baud rates :	2 interfaces, only measured values from interface 1 can be assigned as inputs 20m ( with modem : 6 km ) up to 9600 ( with modem : 300 ) Baud
SPI Interface : max. length : Baud rate :	serial, 4 data lines and GND 1 m (shielded cable) 0.5 MBit/s

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