Sensaphone SCADA 3000 Users manual - Manual (Page 42)

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SCADA 3000 User’s Manual
GROUNDING AND POWeR SURGe PROTeCTION
SCADA 3000 should be earth grounded by connecting a true earth ground to the terminal
labeled EG. This is essential to protect SCADA 3000 from possible damage due to static elec-
tricity, power surges and lightning strikes.
The Sensaphone
® SCADA 3000 can be damaged by power surges and lightning through the
telephone line and the power supply. Although SCADA 3000 has built-in surge protection,
consideration should be given to provide additional protection for the unit and for any elec-
tronic equipment that is attached to your power supply and telephone lines, especially if you
live in a lightning-prone area. Surge protection is available through Sensaphone. Call for
details.
Power Supply Fuse
The main unit includes a 4A Fuse to protect the unit and power supply from short circuits and/
or product malfunction. If no lights come on when you depress the power switch, it is possible
that the fuse is blown. You can verify a blown fuse by removing it and testing for continuity.
To remove the fuse, simply pull it straight out of its socket. A spare fuse has been included for
convenience, but be sure to correct the problem before trying another fuse (Replacement fuse:
Wickman #3721400041). Any of the following could cause the fuse to blow:
• too much current being drawn due to the number of modules connected.
• voltage at the power input terminals too high (16V Max.)
• internal circuit malfunction
estimating Power Consumption
Determining the power consumption of the system is required to make sure you have enough
power available from your power supply in addition to determining the proper size battery for
your application.
Listed below is the typical power consumed by the main unit and each module in the SCADA
3000 family when powered from 15 VDC.
Calculating Power Consumption for the SCADA 3000
Quantity x Current (Ea.) = Total (amps)
Main RTU power _____ x 0.215 Amps = ___________
Modem option _____ x 0.085 Amps = ___________
Real Voice option _____ x 0.008 Amps = ___________
Universal input module _____ x 0.100 Amps = ___________
Pulse Count module _____ x 0.100 Amps = ___________
Thermocouple module _____ x 0.100 Amps = ___________
Relay output module _____ x 0.080 Amps = ___________
Analog output module _____ x 0.080 Amps = ___________
Annunciator module _____ x 0.100 Amps = ___________
Battery Charge Current _____ x 0.600 Amps = ___________
*Number of 4-20mA transducers _____ x 0.038 Amps = ___________
powered from the 24 V supply
Add Wireless Data Radio
____ Amps(avg.) ___________
Total Current = __________Amps