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Figure 6.4. Connection of two loop powered 4-20mA devices
Both inputs will report the voltage that is connected to them and so can be used as general purpose
analog or digital inputs.
Note When a voltage is connected to the current source pins, current may flow backwards into the ORB
and the resulting current measurement may be negative.
Warning Connecting a power source greater than 12V to pins 3 or 5 may result in permanent damage
to the functions of those pins or to the ORB.
6.1.1 Specification
Parameter
Specification
Maximum source current
100mA per pin
Current measurement accuracy (20mA range)
+-0.1mA
Current measurement accuracy (100mA range) +-1mA
Maximum voltage on pins
12V
Voltage measurement accuracy
+-300mV
6.1.2 Settings
Measurements can be scheduled as a multiple of the base-interval. At the interval, the current sources will
turn on and a measurement will be made. The fastest possible measurement rate is achieved by setting
the interval to 1 in which case measurements will occur on every base interval. To reduce power
consumption, the measurement rate can be turned down by increasing the measurement-interval.
If a connected device needs some time to stabilise before measurements can be taken, the current sources
can be set to turn on a short time before a measurement is to be made using the start time option. Keep
the start time value to a minimum to reduce overall power consumption when running on batteries or
ORB User Guide, Release 1.1
6.1. Current Source 1 and 2
57
Содержание ORB-X1-G
Страница 1: ...ORB User Guide Release 1 1 Senquip Sep 14 2020...
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Страница 16: ...ORB User Guide Release 1 1 10 Chapter 1 Introduction...
Страница 44: ...ORB User Guide Release 1 1 38 Chapter 3 Power Supply...
Страница 50: ...ORB User Guide Release 1 1 44 Chapter 4 General Setup...
Страница 86: ...ORB User Guide Release 1 1 80 Chapter 6 External Sensors...
Страница 92: ...ORB User Guide Release 1 1 86 Chapter 7 Network Connection...
Страница 98: ...ORB User Guide Release 1 1 92 Chapter 8 Endpoint Setup...
Страница 110: ...Figure 10 2 Dimensioned side view ORB User Guide Release 1 1 104 Chapter 10 Mechanical Speci cation...
Страница 111: ...Figure 10 3 Dimensioned side view including mounting brackets ORB User Guide Release 1 1 10 1 Mechanical drawings 105...
Страница 116: ...ORB User Guide Release 1 1 110 Chapter 10 Mechanical Speci cation...
Страница 130: ...ORB User Guide Release 1 1 124 Chapter 12 Troubleshooting Guide...
Страница 134: ...ORB User Guide Release 1 1 128 Index...
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