Multi-Tech Systems 7500 - Manual (Page 219)

ION 7500 / ION 7600 User’s Guide Configuring Digital Output
Digital and Analog I/O Technical Note Page 219
Configuring Digital Output
Digital output ports provide access to external relays and control capabilities. For
example, an ION meter’s digital outputs can provide on/off control signals for
capacitor banks, generators, and other equipment.
ION meter digital output ports can also send out status signals or kWh pulses if
the receiving device determines energy usage by counting pulses.
Different ION modules are used to control the hardware digital output ports in
different ways. For relay and control, the Digital Output module is used. For
pulsing applications, the Pulser and Calibration Pulser modules are generally
used.
Each hardware digital output consists of a dry contact relay (switch) that is either
open or closed. An external power supply may be required to sense whether the
relay is open (no current) or closed (flowing current).
C AUTION
The digital relay outputs should never be used for primary protection functions.
For additional information regarding using the digital output ports for energy
pulsing, refer to “Energy Pulsing from ION Meters” on page 232.
Digital Output Module
The Digital Output module acts as an intermediary between another module in the
device and the hardware port. It takes a Boolean input and sends that out a
hardware channel as a constant level or pulse. With the module setup registers,
you must specify what kind of output that the module produces, and on what
hardware port.
Digital Output Module Setup Registers
Setup Register Description
Event Log Mode Specifies whether events are logged or not (LOG ON, LOG OFF)
Polarity Determines if the signal from the hardware is inverting or non-inverting
Pulse Width Specifies the width of the output pulse
Ports Defines the hardware port where the pulse or (continuous) output is sent