Pulse Inputs (Pi) - Emerson FloBoss 107 Instruction Manual

4.10 Pulse Inputs (PI)

Caution
Issued Feb-07
Figure 4-10. Discrete Outputs
Pulse inputs (PI) processes signals from pulse-generating devices and
provide a calculated rate or an accumulated total over a configured
period. The FB107 pulse input circuits are physically the same as the
discrete inputs. The pulse input routes to a pulse accumulator, where the
pulses are counted and accumulated.
The PI is most commonly used to interface to open collector/open drain
type solid-state devices. The PI can be used to interface to either self-
powered or FB107-powered devices.
Acceptable PI voltage levels range between 0.5 volts dc (low) and 1.5
volts dc (high).
The pulse input only operates with non-powered devices, such as
"dry" contacts or isolated solid-state switches. Use of the PI with
powered devices may cause improper operation or damage.
Select PI as the I/O Type for the selectable pulse inputs/discrete
Note:
inputs when you configure it for use as a pulse input. Refer to
Figure 4-5.
Inputs/Outputs and RTD Input
FloBoss 107 Instruction Manual
+
INTERNAL
CONTROL
-
4-15