Emerson FloBoss 107, Инструкция по эксплуатации

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FloBoss 107 Instruction Manual
3-2 Power Connections Revised June-2017
Take care to route power away from hazardous areas, sensitive
monitoring devices, and radio equipment. Local and company codes
generally provide guidelines for power installations. Rigorously follow all
local and National Electrical Code (NEC) requirements for power
installations.
Power
Requirements
A dc voltage source is the typical source of primary power for FB107
installations. The FB107 accepts input voltages from 8.0 volts to 30.0
volts either at the AUX PWR IN connection on the base unit or at the
PWR (IN+ / IN

) terminals on the CPU. The AUX PWR IN terminal
block accepts wires from size 12 to 22 AWG.
The power consumption of an FB107 and the attached expansion racks
determines the current requirements for the external power supply.
The CPU module’s power input has a removable terminal block for
wiring and servicing. The terminal blocks can accept size 16 to 24 AWG
(American Wire Gauge).
Note
:
Isolation occurs between the CPU and the field logic.
Using ROCLINK 800, you can configure the I/O on the CPU module to
set the loop output power to 10 volts dc or 24 volts dc:

The 24-volt setting of the loop output power is used to power
devices that require 24 volts dc to ground, allowing the external
device to send the FB107 a 4 to 20 mA signal based on pressure,
temperature, level, and such.

The 10-volt setting of the loop output power is intended for low
power transmitters. The loop current is designed to deliver 80 mA
to power two field devices that connect back to the two analog
inputs.
Note: The CPU I/O assembly uses the CPU’s loop power output and
ground connections.
The I/O module only supports 24 volts dc loop output power. When 10
volts is selected, the loop output power will be 10V+ depending on input
power supply
Note:
If the input voltage is greater than the 10-volt loop, then the loop
voltage equals the input voltage. For example, if the PWR IN is
14 volts dc and you select a 10-volt loop, the loop output equals
14 volts dc.
You can use current analog inputs of 4 to 20 mA when the 250-ohm
resistor is selected in the AI configuration using ROCLINK 800.