Ac Power And Earthing Requirements - Toshiba Strata DK40 Installation & Maintenance Manual

DK40 Installation
Table 2-1 Summary of Electrical/Environmental Characteristics
KSTU3 modem interface data rate
RSTU
Ring Voltage
Ringing capability
RSTU modem interface data rate
Traffic Rating Characteristics
9 CCS per station system-wide

AC Power and Earthing Requirements

The Strata DK40 requires an earth connection back to the main distribution point for proper
operation and safety. Failure to provide this earth may be a safety hazzard or lead to
confusing fault, or operational symptoms and,in extreme cases, system failure. The AC power
cord already contains a conductor for the "protective earth" provided by the commercial
power outlet. This alone is not sufficient. It is also necessary to connect a seperate insulated
conductor between the Frame Ground (FG) terminal on the base KSU and the main
distribution point.
rules for earthing contained in BS6701 parts 1 & 2.
Figure 2-3
2-4
Refer to the Strata DK40 Programming Manual or DK Library CD-Rom for more details.
14,400 bps maximum (ensure appropriate
programming parameters are set)
80V RMS sine wave
1.5 REN per circuit
14,400 bps maximum (ensure appropriate
programming parameters are set)
(See Figure 2-3). This must be installed in accordance with the general
"Protective Earth"
AC Earth
A
Main Building
Distribution Point
DK40 Earthing Diagram
AC Power and Earthing Requirements
Protective Earth
Earth1
To AC Power Cord
DK40 BaseKSU
Power
Supply
1347.0 mm
AC Voltage
220~240v
AC Current
1 amp max.
FG
Main Building
Distribution Point
Strata DK40 I&M Manual Spring 1999
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