GE IC754VSI06SKD, Руководство пользователя

Страница: 46 / 78

D e t a i l e d O p e r a t i o n
Communication Port
38
6" QuickPanel View Keypad GFK-2357A
3
C O M M U N I C A T I O N P O R T
The QuickPanel View Keypad has one serial data communication port, COM1.
C O M 1 - S e r i a l
The COM1 port is a general purpose bidirectional serial data channel that supports
the EIA232C and EIA485 electrical standards. The COM1 port can be accessed
and configured:
■
as a direct or dial-up remote networking connection.
■
as the port used by a terminal session (modem link only).
■
from a user-created application program.
A connection can be configured to reside on a network supporting a TCP/IP
protocol.
A DB25S (female) connector, mounted on the bottom of the enclosure, provides
standard signals as described in the following table.
Note: Pin 14 is fused with a field-replaceable, 1.0A fast-blow fuse.
R e c o m m e n d e d C a b l i n g f o r T I A / E I A 4 2 2 o r T I A / E I A 4 8 5
The COM1 port on the QuickPanel View provides connections to devices, which
support either TIA/EIA422 or TIA/EIA485. These electrical standards specify a
differential signaling technique which provides high data rates, long distances and
good noise rejection. The standards do not address signal encoding (protocol),
connectors, or cabling. However, certain characteristics of interfacing these
devices should be considered in order to ensure reliable connections.
1 GND - Frame Ground 14 VCC - 5VDC, 0.5A
2 TX - (EIA232C) 15 TXB (EIA485)
3 RX - (EIA232C) 16 RXB (EIA485)
4 RTS - (EIA232C) 17 n/c
5 CTS - (EIA232C) 18 CSB (EIA485)
6 DSR - (EIA232C) 19 ERB (EIA485)
7 SG - Signal Ground 20 DTR (EIA232C)
8 DCD - (EIA232C) 21 CSA (EIA485)
9 TRMRXB (EIA485) 22 ERA (EIA485)
10 RXA (EIA485) 23 n/c
11 TXA (EIA485) 24 n/c
12 n/c 25 n/c
13 n/c
Bottom