■PC configurable maths function
■T wo isolated inputs and one isolated output
■3-port isolation to 500 or 1000Vdc
■High accuracy, low cost
■Ultra compact, only 22mm wide
■Optional alar m relays
Programmable
Mathematics Unit MATHSCON
Description
The MATHSCON Isolating Signal Converter can be user
configured and programmed using a PC via the serial
communications by using the RS232 or RS485.
Each channel can be multiplied by a factor or linearised and then any
of the following functions can be performed on those input channels.
Addition Output = A + B
Subtraction Output = A - B
Multiplication Output = A x B
Division Output = A ÷ B
Square root Output = √A
Squarer Output = A2
Rect’ weir Output = A ^ 3/2
Polynomial Output = xAn(operator)yBm+C
(where x, y, n, m and C ar e PC configurable)
High signal select
Low signal select
Average of the two signals
Rate of change limiting of the signal.
The unit provides an isolated current or voltage output cor responding
to the result of the requir ed function. As an option, two alar m relays
are also available.
The power supply requirement is 16 to 32Vdc.
Inputs
The input types and ranges below are our standard ones only. Please
contact our sales department for details on any application not
specified below.
DC Cur rent
0-20mA, 4-20mA, 0-10mA all into 10Ω
DC voltage
0-1V, 0-10V, 1-5V all into 1MΩ
Outputs
DC Cur rent Sour ce and Voltage
0-20mA, 4-20mA, 0-10mA into 1kΩmaximum
0-1V, 0-10V, 1-5V into a minimum 500kΩ
Options and ordering codes
TRIP
MATHSCON JJJX––6TRIP
With alarm relays
Without alarm relays
Options Comms
RS232
DRS485
The MATHSCON is designed to be user configurable, however the units can
be supplied factory configured to your specification – Please contact our sales
department with the following:
Configuration options:
Input type: eg mA, Volt
Input range: eg 4-20, 0-10V
Output type: eg mA, Volt
Output range: eg 4-20mA, 0-10V
Linearisation: eg None, √, √3/2, √5/2
Maths function: eg +, -, x, ÷, average
Comms option: RS232 or RS485
3
Year
Guarantee
PRICE
INFORMATION
AND ORDERING
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INFORMATION
AND ORDERING
Mathscon
Specifications
Parameter Min Typ Max Comments
Supply voltage 16V 24V 32V
Supply cur rent 100mA 200mA
Input impedance (volt) 1MΩ
Input impedance (mA) 10Ω11Ω
Volt drop (mA input) 0.2V 0.22V At 20mA input
Input resolution 0.001% Dependent on input type
Overall accuracy ±0.04% ±0.06% Input to analogue output
Input accuracy ±0.01% Input to RS232 comms output
Temperature coefficient 50ppm/˚C
Load resistance er r or ±0.1ppm/Ω±1ppm/Ω0 < RL< 1kΩ(mA output)
T ime constant (10-90%) 300ms See note
Operating ambient -15˚C 60˚C
Relative humidity 0% 90%
Isolation voltage 500V 1kV option by special request
Sur ge voltage 2.5kV for 50µS Transient of 10kV/µS
Notes Absolute maximum ratings indicate sustained limits beyond which damage to the device may occur.
Device is protected against reverse polarity connection.
Accuracy figures based on an ambient temperature of 20˚C.
The time constant is dependent on which processing options have been selected.
Dimensions and connections
T ypical application
123
1110 12
456
789
Connection details
1. Power input -ve
2. Power input +ve
7. Input ground 2
8. Voltage input 2
9. mA input 2
10. Voltage input 1
11. mA input 1
12. Input ground 1
4. Output ground
5. Voltage out +ve
6. mA source out +ve
13. Relay 1 common
14. Relay 1
15. Relay 2 common
16. Relay 2
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104.5mm
75mm 22.5mm
98mm
Flow meter
1
Flow meter
2
+24Vdc
Digital comms Loop-Powered
Panel meter
4-20mA
12.5
(Flow 1 - Flow 2) >SP
Integrate (Flow 1 - Flow 2)
PRICE
INFORMATION
AND ORDERING
PRICE
INFORMATION
AND ORDERING
