Toshiba V Series Operation Manual page 23

(4) Serial communication port RS-232C (TOOL)
This is the RS-232C port for tool/debugger. The connector is the 9-pin D-sub type. It
may be used for tool or debugger as selected with the 8-bit DIP switch (operation
mode setting switch) in the module.
Normally, the module is used in tool mode (Do not change the setting).
(5) Drop cable connector CN1 for line-B modules
This is an 8-P modular connector to connect the main modules (EN621 and EN641)
to the line-B modules (EB621 and EB641) in a dual Ethernet transmission line
configuration.
(6) 12 VDC power connector CN2 (+12 VDC, 0.5 A maximum)
The EN611, EN621, and EB621 (10BASE5) require a separate external power
supply of 12 VDC for AUI transceivers.
The external power to be supplied to the AUI transceivers is received at this
connector. The connector is a 2P type. Use a special power cable of +12 VDC.
(Standard length: 0.5 m)
Each AUI transceiver consumes 0.5 A maximum, so a power source capable of
supplying 0.5 A or more is necessary for each module.
Signal Name
12Vdc
0V
Note 1: The modules are protected with a fuse inside.
Note 2: In using a system of dual transmission line configuration, be sure to con-
(7) Operation mode setting switches
Refer to Chapter 3 Setting.
6F8C0879
Description
12 VDC input
(12.0VDC±5%)
nect separate power sources to the 12 VDC power connectors CN2 on the
EN621 and EB621 (Line A/Line B). In cases where it is not possible to use
separate power sources, wire the power cable in such a way that the
EN621 and EB621 can be separately switched off. It is recommended that
each module be provided with a separate power cable.
Applicable modules
• EN611
• EN621
• EB621
2
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