DK40 Installation
AC Power and Earthing Requirements
2-4
Strata DK40 I&M Manual Spring 1999
Refer to the Strata DK40 Programming Manual or DK Library CD-Rom for more details.
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. (See Figure 2-3). This must be installed in accordance with the general
rules for earthing contained in BS6701 parts 1 & 2.
KSTU3 modem interface data rate
14,400 bps maximum (ensure appropriate
programming parameters are set)
RSTU
Ring Voltage 80V RMS sine wave
Ringing capability 1.5 REN per circuit
RSTU modem interface data rate
14,400 bps maximum (ensure appropriate
programming parameters are set)
Traffic Rating Characteristics
9 CCS per station system-wide
Table 2-1 Summary of Electrical/Environmental Characteristics
Figure 2-3 DK40 Earthing Diagram
Power
Supply
FG
"Protective Earth"
AC Earth
Earth1
Protective Earth
To AC Power Cord
DK40 BaseKSU
A
Main Building
Distribution Point
Main Building
Distribution Point
AC Voltage
220~240v
AC Current
1 amp max.
1631
1347.0 mm
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