Circuits for minor automation routines: minimum requirements for integration
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HS-RC-C5E-TIN_06.fm
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7.5 RS232 / RS422 serial communication
Preliminary procedures / notes
– The user may use the COM2 port available on the AMS-APC820 module.
– The COM2 provides the RS232 / RS422 serial connection. The RS232 and RS422 ports cannot be used
contemporaneously.
– It is necessary a female 9-pin (tray type) DSUB movable connector (AMS-APC820 module side),
completed with cap (not supplied).
Features:
– RS232/RS422, non modem-capable,
electrically insulated
– UART 16550-compatible, 16-byte FIFO
– Speed: Max. 115 kbaud *¹
– Connection cable max length:
RS232: 15 m (49 ft)
RS422: 1200 m (3937 ft)
Pins:
Operating procedure
a. Prepare the connection cable.
b. Connect the connector on the
COM2 to the.AMS-APC820
module.
c. The connection cable must exit
the Control Unit through the
X90 cable gland connector on
the Connector Interface Panel
(CIP).
d. Place the connection cable tidily inside the Control Unit, avoiding passages near
the powering cables.
e. If necessary, the communication may be tested using a simple programme and
a connection cable, as shown in Fig. 7.3. A standard Personal Computer,
supporting Hyper Terminal routine and configured to receive characters from a
serial unit at 9600 Baud/Rate, may be used as receiving unit. See also Fig. 7.4.
COM2
1
9
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