Toshiba VP 300, Installation Instructions Manual

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ADDITIONAL SUBSYSTEMS
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System Terminal Port
The system terminal port is an RS-232C port used for communication with the VP 300 for system
configuration, error reporting, and other system maintenance. This port supports any ASCII
send/receive serial terminal. Refer to INSTALLATION, Connecting Terminals, in this manual.
For convenience, there are two parallel connections to the system terminal port, one in the front (SP1)
and one in the rear (J1). Connection can be made to only one of these connections at a time. If a
terminal is to remain with the system permanently, use the rear connection. If a terminal is to be
connected temporarily, use the front connection. The cabinet door must be open to use the front
connection.
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Fan Tray
The fan tray is a plug-in fan assembly used for system cooling. The fan tray is installed in the center of
the VP 300 cabinet, between shelves A and B. The fan assembly is accessible from the front of the
cabinet.
The four fans draw air through the front door air filter and exhaust from the top rear and top sides of
the cabinet. The fans use 12 volts and are powered from the +12VM output of the PSU. The fans are
not sensitive to the input power to the cabinet.
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Power Line Filter
The power line filter is located at the rear of the cabinet. The AC system power cord plugs into the
power line filter. The power line filter prevents electro-magnetic interference (EMI), from entering the
primary power lines. Some chassis disassembly is required to replace the power line filter. The voltage
rating of the power line filter must agree with the input voltage rating of the PSU.
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In –48VDC systems, the power cord is integral with the power line filter.
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System Alarm Relays
Major and minor alarm relays can be used for alarm purposes. A dry relay contact closure is provided
for the major and minor alarms. Refer to INSTALLATION, Connecting Terminals section, of this
manual for pinout configuration for the alarm relays.
The relay controls are connected to the alarm relay port (connector J5) at the rear of the cabinet. The
alarm relays are located on the CPU board. Any hardware error closes the minor alarm relay. Any
alarm call also closes the major alarm relay. Refer to MAINTENANCE, Alarm Test section, in this
manual.
Upon a power failure, both relays close the contacts to indicate a power failure. Both relays remain
closed during restoration of power until the software boot process opens the relays. However, if there
was an alarm condition prior to the power failure or an alarm condition arose during the boot process,
the relays remain closed until the hardware errors are cleared.
Toshiba VP Systems Release 7.1 July, 1994
1-16 Installation and Maintenance Manual
1.4