Digiplex DGP-641 Manual de instalación descargar pdf (Pagina 45)

DGP-848 - 45 - Programming Guide

External Power Supply

Devices connected to a power supply do not draw power from the control panel’s auxiliary output.

Do not use the same transformer for the control panel and the external power supplies. Modules should never

be installed more than 914m (3000 ft) from the control panel.

Connecting the Combus in Noisy Environments

When installing the combus wires in proximity to high electrical interference such as neon lights, motors, high-voltage wiring,

transformers, or if connecting the combus across separate buildings, you must use shielded cables. Connect the shielded

cable as follows:

Within the Same Building: Strip the outer jacket at one end of the shielded cable to expose the shield and connect the

shield to the control panel ground (not the dialer ground), while leaving the shield at the other end of the cable open (floating).

Across Separate Buildings: Strip the outer jacket at one end of the shielded cable to expose the shield. In the same

building that houses the control panel, connect the exposed shield to a cold water pipe or any other earth ground available,

while leaving the shield at the other end of the cable open (floating). The same configuration applies for any subsequent

building.

152m (500ft) from control panel

152m (500ft) from control panel’s AUX. output

Therefore this run = max. 273mA

610m (2000ft) from control panel

152m (500ft) from power supply

Therefore this run = max. 273mA

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Digiplex DGP-641 Manual de instalación Pagina 45