Figure 8: Typical Do Point Schematic - ABB XSeriesG4 User Manual

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Voltage threshold to deactivate the input, 3.1 V (referenced to GND terminal)
–
Voltage threshold to activate the input, 0.5 V (referenced to GND terminal)
–
Conductor pairs must be shielded to prevent spurious signals
Debounce
G4
The XRC board includes jumper pins to enable or disable debounce. See Figure 5: XRC board, item 18 for the jumpers. The
inclusion of the debounce capacitor, when enabled, allows the unit to ignore noise when manual switches are set. When
disabled, the high speed pulses are received exactly as sent. If input is received as a solid state, then debounce is not needed
and it should be disabled.
Digital output
G4
The Totalflow XRC provides four digital (12 Vdc) outputs as means to control external equipment with the XRC
XRC board, items 19 and 20.)
Digital outputs can be programmed to trigger, or activate, on any of several AGA3, AGA7 or Liquid Measurement limits or
thresholds. The following are just a few of those conditions that can trigger one of the digital outputs:
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Differential pressure over high limit
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Volume set point
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Differential pressure under low limit
–
Flowing temperature low
–
Static pressure over high limit
–
Flowing temperature high
–
Static pressure under low limit
–
Flow rate low
–
Low charger voltage
–
Flow rate high
–
Remote sense is ON
–
Trip on digital input
Other applications are custom-programmable by Totalflow or user-programmable with IEC 61131 programming language.
DANGER – Serious damage to health / risk to life. When connecting or disconnecting any wires to the XRC
board, remove all power sources and make sure to be grounded properly.
Figure 8 is a typical point schematic for the digital output. Figure 9 shows an example of point connections for the DO.
SIG
2.5A
24V
GND

Figure 8: Typical DO point schematic

OUTPUT CONTROL
XSeriesG4 Remote Controller User's manual 2103334 Rev. AB | 11
1 System overview
G4
(Figure 5:
G4