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Crystal Engineering Corporation
Current,.Voltage.&.Switch.Test.(MA20).Specifications
General
Modes
Current
mA
% 4 - 20
Current with HART Resistor
mA
% 4 - 20
Voltage
V
Switch Detection
Open
Closed
.
X
Connection
2mm banana jacks for sheathed plugs, 12.7mm (0.5 in) spacing
.
X
Terminals
.
X
Logging.Interval
Fastest Logging Interval . . . . . . .6 readings per second.
.
X
Entity.Parameters
The MA20 Module has these specific input entity parameters:
Ui = 28 V
Uo = 6.6 V
li = 93.3 mA
lo = 4.45 mA
Pi = 653.3 mW
Po = 7.34 mW
Ci = 0.36 uF
Co = 0.5 uF
**
Li = 39.1 uH
Lo = 12 uH
*
*
Total cable inductance between all modules
**
Dependent on the supply to the terminals but shall not be greater than 0.5 uF
MA20 Functional Diagram
mA
HART
250 Ohm
Resettable Fuse
V
Common
Voltage Measurement
Current Measurement
Switch Test
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