Scanner 1141 Hardware User Manual
86
Expansion Board Interface
The Scanner 1141 has a provision for an expansion board. The MIO2 expansion board standard
configurations are with the following I/O or MVT/RTD only. The specifications for the expansion
board are the same as the main board, unless otherwise noted.
Communications
1 MVT/RTD, serial TTL
Status Input/Status or Pulse Output
4 software selectable threshold in; MOSFET
outputs
Analog Output
1 optically isolated output, 4-20 mA
Pulse Input
1 pulse input (for volume accumulation)
Transmitter and Auxiliary Power Supply
There are several options for powering transmitters and other external devices from the mainboard.
-
Current Limited Transmitter Supply (CL): a resistively limited output that is “powered” from the
higher of the battery and power input voltages. Limited to about 50 mA.
“VTx1”on order code
input options B1, M1 and FL.
-
+12V, 30mA Voltage Limited Transmitter Supply (12VL): the supply is generated by a linear
regulator that is powered from the higher of the power input or battery supplies, so that it remains
valid anytime there is a power source for running the computer. The regulator has a low (250mV)
dropout, so that the output will remain above 10.0V down to the typical cutoff voltage for a 12V
SLA battery. This solution is not suited to 6V battery powered systems that require a transmitter
supply. “VTx2” on order code input options B1 and M1.
-
+12V, 30mA Stepup Transmitter Supply (12V): For +6V battery systems, the charge pump is
required to provide an adequate transmitter supply down to the lowest (battery) voltage of
operation. For 12V battery systems transmitters that have a maximum voltage less than the
power input can be connected to this terminal. There is also a current limiter added to the charge
pump output to prevent damage in the event that the transmitter supply is shorted in the field.
“VTx2” on order code input option FL.
Two separate short circuit protected outputs are optionally available for the purpose of powering
radios and other devices. All “Division 2 only” configurations have an 18-watt protected switch that
is the higher of the power input or battery voltage. For example, with 18V power input, 1 Amp
maximum would be available for powering a radio. The FL configuration also has a +5V @ 200mA
output that can then be used to directly power +5V radios or to act as a logic level control signal for
+12V radio systems. Both supplies can be turned on and off in firmware to conserve power in
communication devices. These two outputs can be turned off by setting the low battery alarm, and
turned on when the battery voltage exceeds the low battery alarm by the deadband.
Содержание NUFLO 1141C
Страница 1: ...Manual No 30165009 Rev 01 NUFLOTM Scanner 1141 RTU Hardware User Manual ...
Страница 19: ...Chapter 3 Main Circuit Board Wiring 19 Figure 2 5 Components of 1141C Figure 2 6 Components of 1141L ...
Страница 28: ...Scanner 1141 Hardware User Manual 28 Figure 3 1 Scanner 1141 main circuit board ...
Страница 39: ...Chapter 3 Main Circuit Board Wiring 39 Wiring Diagram Summary Figure 3 7 Main circuit board wiring summary ...
Страница 66: ...Scanner 1141 Hardware User Manual 66 ...
Страница 67: ...Chapter 6 Parts List and Order Code 67 Chapter 6 Parts List and Order Code Scanner 1141C ...
Страница 68: ...Scanner 1141 Hardware User Manual 68 Scanner 1141L ...
Страница 69: ...Chapter 6 Parts List and Order Code 69 Scanner 1141G ...
Страница 91: ...Appendix A Specifications 91 Outline Dimensions Scanner 1141C ...
Страница 92: ...Scanner 1141 Hardware User Manual 92 Scanner 1141L Front and Side Views ...
Страница 94: ...Scanner 1141 Hardware User Manual 94 Scanner 1141G ...
Страница 96: ...Scanner 1141 Hardware User Manual 96 Drawing 1 Installation ...
Страница 97: ...Appendix B Control Drawings 97 Drawing 2 Power Supply ...
Страница 98: ...Scanner 1141 Hardware User Manual 98 Drawing 3 Communications Serial Ports ...
Страница 99: ...Appendix B Control Drawings 99 Drawing 4 Status Pulse Inputs Outputs ...
Страница 100: ...Scanner 1141 Hardware User Manual 100 Drawing 5 RTD Inputs Analog Inputs Outputs ...
Страница 101: ...Appendix B Control Drawings 101 Drawing 6 Analog Outputs ...
Страница 102: ...Scanner 1141 Hardware User Manual 102 ...
Страница 117: ...117 ...
Страница 118: ...118 ...
Страница 119: ......
Страница 120: ......