Crystal nVision Reference Recorder - MA20 Module Specifications

Page 44 • Crystal Engineering Corporation
Current,.Voltage.&.Switch.Test.(MA20).Specications
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 specic 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