FloBoss 103/104 Instruction Manual
Revised August-2017 Input/Output 4-3
4.2 I/O Wiring Requirements
I/O wiring requirements are site and application dependent. Local, state,
or NEC requirements determine the I/O wiring installation methods.
Direct burial cable, conduit and cable, or overhead cables are options for
I/O wiring installations.
4.3 Analog Input
The diagnostic Analog Inputs (logic voltage, battery voltage, and
board/battery temperature) are not designed to be configured or wired.
The pressure and temperature inputs are configured as the first three
Analog Input points in ROCLINK 800 Configuration software:
Differential pressure or Pressure, Static pressure or Auxiliary pressure,
and RTD temperature. The RTD input is the only one of these to be
wired; refer to Section 4.8.1.
The Analog Input (AI) on the termination board monitors current loop
and voltage input devices. The A/D signal input range is 0–5 volts, or
0–20 mA, with 12-bit resolution. You configure the AI using
ROCLINK 800 software.
Note: External power is required to power the devices sending the
0–20 mA signals to the FB100.
4.3.1 Wiring the Analog Input
Figure 4-2 shows the terminals for connecting the Analog Input wiring.
The “+” terminal is the positive signal input and the “–” terminal is the
signal common. These terminals accept a voltage signal in the 0–5 volt
range. Because the “–” terminal is internally connected to common, the
Analog Input channels function as single-ended inputs only.
Use current inputs of 0–20 mA when the switch for a 250-ohm resistor
is enabled. This switch is located below the terminations (see Figure 4-
1).
Note: When connecting the analog input channel to a voltage device,
be sure to disable the 250-ohm resistor switch on the
termination board.
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