Phonetics Sensaphone SCADA 3000, User Manual

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Chapter 7: I/O eXPANSION mODULeS
ADDING eXPANSION mODULeS
The capabilities of the SCADA 3000 can be expanded by connecting additional I/O modules
to the main unit. This allows the system to monitor or control up to 144 points. A commu-
nications cable and a power cable must be routed to each module. Modules can be located up
to 2000 feet from the main unit. Battery-backed power is provided for the modules; however,
care must be taken not to exceed the maximum power limit of the power supply.
When adding an I/O module, be sure to turn OFF power to the SCADA 3000 during all wir-
ing and installation. When powered up, the unit will automatically check to see if any modules
are connected.
Cabling Notes
Follow these guidelines to protect the communications cable from electrical interference.
• Keep the communications cable at least five feet from any electric motors, trans -
formers, rectifiers, generators, arc welders, induction furnaces, or sources of
microwave radiation.
• If you must run the cable across power lines, run them at right angles to the lines.
• Keep the communications cable at least 6 inches from AC power lines carrying
less than 20A, at least 1 foot from lines greater than 20A, and 2 feet from lines
greater than 100KVA.
• If you run the cable in a metallic wireway or conduit, keep the communications
cable at least 3 inches from AC power lines carrying less than 20A, at least 6
inches from lines greater than 20A, and 1 foot from lines greater than 100KVA.
Running the communications cable through conduit provides extra protection from physical
damage and electrical interference. If you route the cable through conduit be sure to ground
the entire length by connecting it to the building earth ground. For best results, use ferromag-
netic conduit near critical sources of electrical interference. Aluminum conduit may be used in
non-critical areas.
modules
Up to 15 expansion modules may be connected to the SCADA 3000 main unit to provide
additional inputs and/or outputs. Each module must be configured with its own unique address
using the BUS ADDRESS jumpers (see module documentation). You may mix & match
modules to suit your application’s requirements. Specific modules are available to connect
to various types of sensors and equipment. The modules offered by Phonetics are listed as
follows:
FGD-3010 8-Channel Universal Analog Input Module
FGD-3020 4-Channel Pulse Count Module
FGD-3040 8-Channel Relay Output Module
FGD-3050 4-Channel Analog Output Module (4–20mA, 0–20mA, 0–10V)
FGD-3060 Annunciator Module
Power Supply
7-1