Sensaphone SCADA 3000 Users manual - Manual (Page 255)

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Chapter 24: Pulse Count Module
Chapter 24: Pulse Count module
INTRODUCTION
The SCADA 3000 Pulse Count Module is an optional component for use with the SCADA
3000 system. It features four totalizing pulse count channels and four virtual channels that can
be programmed to calculate various rates or to display count overflow. The module has four
pulse count channels, each of which is capable of counting pulses at a rate of up to 10,000
pulses per second (10KHz). Each channel will totalize pulses up to one million and then reset
to zero. The four virtual channels can be programmed to calculate the pulse as either pulses
per second, pulses per minute or pulses per hour. The module is compatible with dry contact
or solid state pulse generating devices such as relays or switches. The term DRY contact means
that there must NOT be any voltage connected to the circuit. The module may also be con-
nected to the logic output of another solid state computer device (e.g., Open Collector, TTL,
CMOS). The module includes adjustable filtering for each channel to prevent counting errors
generated by the bounce from slow-moving switches.
INSTALLATION
This chapter provides information to install the Pulse Count Module. Please read the entire
chapter before starting.
OPeRATING eNVIRONmeNT
The Pulse Count Module should be mounted and operated in a clean, dry environment. Do
not mount the unit where it will be subject to shock and vibration. The unit is microprocessor
controlled and as a result it should not be installed near devices that generate strong electro-
magnetic fields. Such interference is typically generated by power switching equipment such
as relays or contactors. A poor operating environment may result in unwanted system resets
and/or system lockup. The temperature range the unit can operate in is 32°F to 158°F (0°C to
70°C). If the unit needs to operate below freezing, a strip heater should be installed nearby
CAUTION: The Pulse Count Module is a sensitive electronic device. Personnel
and work area should be grounded before coming into contact with this device.
Do not install the Pulse Count Module near strong electrostatic, electromagnetic,
magnetic or radioactive fields.
mOUNTING THe UNIT
When you receive the unit, carefully remove it from the box. Mounting tabs with holes are
provided on the top and bottom sides of the enclosure (see figure below). Mount the unit in a
position that allows easy access to the terminal blocks.