Comtech EF Data KPA-040 Manual de instalación Pagina 54

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Unpacking and Installation
MNC-0300-001 16 of 20 Revision L
last command received has precedence.
COM1 is an RS-232 only serial interface. No switch settings are
required for COM1. Table 6, RS-232 Pinouts, lists the pinouts
for COM1.
COM2 can be configured (with the set of dip switches on the
rear panel) as an RS-485 2-wire serial interface or as an RS-
485 4-wire serial interface. The pinouts for the COM2 interface
are listed in Table 7, Pinouts for the COM2 Intereface, and
typical implementations are shown in Figure 9, Typical RS-485
2-Wire Duplex Implementation and Figure 10, Typical RS-485 4-
Wire Full Duplex Implementation.
The COM2 Setup Switches are used to configure the COM2
serial interface. Switches 1, 3 and 4 are used for COM2 setup.
Switches 2, 5, 6,7 and 8 are not used. Table 8 lists the settings
for the COM2 Setup Switches.
Table 6, RS-232 Pinouts
Pin No. Function
1 No Connection
2 RXD— Received Data (from Controller)
3 TXD— Transmitted Data (to Controller)
4 No Connection
5 Ground and Signal Return
6 DSR— Request to Send Ready (Controller)
7 RTS— Request to Send (Amplifier)
8 CTS— Clear to Send (Amplifier)
9 No Connection
Table 7, Pinouts for the COM2 Intereface
Pin No. RS-485 2-Wire System RS-485 4-Wire System
1 (-) Data (-) Transmit Data
2 (-) Data (-) Receive Data
3 No Connection No Connection
EAR EXPORT CONTROLLED: The information contained in this Manual refers or relates to a product that is subject
to the U.S. Export Administration Regulations (EAR). Transfer of data herein by any means to a Foreign Person,
whether in the U.S. or abroad, may require an export license from the U.S. Department of Commerce.
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