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Chapter 7: i/o expansion modules, Adding expansion modules, Cabling notes – Sensaphone SCADA 3000 Users manual User Manual

Page 55: Modules, Chapter 7: i/o expansion modules -1, Adding expansion modules -1, Cabling notes -1, Modules -1

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Chapter 7: I/O Expansion Modules

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 communica-

tions 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 wiring

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 inch-

es 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)