Discrete Output Relay Module; Pulse Input Source And Isolated Modules; Slow Pulse Input Source And Isolated Modules - Emerson Fisher FLOBOSS 407 Instruction Manual

FloBoss 407 Instruction Manual

3.2.6 Discrete Output Relay Module

The Discrete Output Relay (DO Relay) module provides two sets of "dry" relay contacts to switch
voltages of up to 250 volts ac. One set of contacts is normally open and the other set is normally
closed. Two types of relay modules are available, one with a 12 volts dc energizing coil and the other
with a 24 volts dc energizing coil.
An LED shows the status of the output. Functions supported by the module include: sustained discrete
output, momentary discrete output, slow pulse-train output and time-duration discrete output. The
module contacts are isolated from the ROC/FloBoss power supplies.

3.2.7 Pulse Input Source and Isolated Modules

The Pulse Input Source (PI Source) and Pulse Input Isolated (PI Isolated) modules count pulses from
pulse-generating devices. Each module can accommodate one pulse input.
Both types of modules use an LED to show when the input is active and use a scaling resistor for
scaling the input range. Input pulses are counted by a 16-bit counter capable of storing up to 6.5
seconds of pulse counts for a 10-KHz input signal. Functions supported by both modules are:
slow-counter input, slow rate input, fast counter input, and fast rate input.
The source module provides a source voltage for dry relay contacts or for an open-collector solid-state
switch. The isolated module accepts an external voltage from a powered device and provides electrical
isolation from the ROC/FloBoss power supplies.

3.2.8 Slow Pulse Input Source and Isolated Modules

The Slow Pulse Input Source (SPI Source) and Slow Pulse Input Isolated (SPI Isolated) modules count
the changes in the status of relays, solid-state switches, or other two-state devices. Each module can
accommodate one pulse input.
The modules provide an LED that lights when the input is active and use a scaling resistor for scaling
the input range. Functions supported are controlled by the ROC/FloBoss firmware. For example: raw
pulse accumulation, rate in engineering units (EUs), today's total in EUs, or rate alarm.
The source module provides a source voltage for dry relay contacts or for an open-collector solid-state
switch. The isolated module accepts an external voltage from a powered two-state device and provides
electrical isolation from the ROC/FloBoss power supplies.
Rev 5/00 3-5