Continental Access SUPERTERM CIC1800, Инструкция по установке и обслуживанию, Страница: 40 / 92

COMMUNICATION CONNECTION
Superterm CIC1800 / CICP1400UL 40
COMMUNICATION CONNECTION
RS-232 Communications - Host
Computer/Modem
Operating as a stand-alone system, the Superterm
communicates with a host computer (directly or
through a modem) through the RS-232 channel.
Proper RS-232 communications require observing
the EIA standard pin definitions of Data Terminal
Equipment (DTE) and Data Control Equipment
(DCE).
NOTE: All RS-232 equipment made by
Continental Instruments LLC, including the
Superterm, are configured as DTE devices.
RS-232 Cable Requirements
RS-232 communications between the Superterm
and a host computer/modem require stranded, 3
conductor, 22 AWG cable with shielding and a
drain wire.
NOTE: DO NOT use twisted pair wires.
Table 26 lists the cable gauge-vs-length
requirements for proper operation of the Superterm
and the host computer.
Table 26 - RS-232 Cable Gauge-vs-Length
Unit Distance Wire Gauge
Host
Computer/
Modem
50ft (15.2m)
(Maximum)
22AWG Shielded
w/Drain
NOTES: A host computer is typically connected
to the RS-232 cable using either a DB9-S or a
DB25-S connector. Modems are typically
connected to the RS-232 cable using a DB25-P
connector.
RS-232 Jumper Settings
RS-232 communications between the Superterm
and a host computer require setting the 232-1
jumper on the Superterm board. Refer to page 72,
232-1 Jumper Setting, for specific information.
Address Setting
Operating the Superterm on the RS-232 channel
requires setting a board address on DIP switch S 1
(address zero is not valid). Refer to page 36,
Network Address Setting, For specific information.
Superterm to Host Computer/Modem
Connection
Figure 27 shows a direct Superterm-to-host
computer connection.
Figure 28 shows a Superterm-to-host computer
connection through a modem.
NOTE: Set switch position 7 of Dip Switch S 1 on
the Superterm to OFF when using a modem. Refer
to page 36, for specific instructions on setting the S
1 DIP switch.
1)
Connect the Transmit pin of the RS-232
device to POLL terminal strip pin number 5
(labeled RxD) (see Figure 28).
2) Connect the Receive pin of the RS-232 device
to POLL terminal strip pin number 4 (labeled
TxD).
3) Connect the Ground pin of the RS-232 device
to POLL terminal strip pin number 6 (labeled
GND).
4) Connect the RS-232 cabling drain wire/shield
to GROUND at the host computer/modem end
of the cable.
Do Not connect the drain wire at
the Superterm end of the cable.
Table 27 lists the connections between the POLL
terminal strip and a host computer.
Table 27 - Connection Table for Host Computer
Signal Superterm
POLL Pin #
Host
Computer
DB9-S pin
Host
Computer
DB25-S pin
TXD 4 2 3
RXD 5 3 2
GND 6 5 7
Table 28 lists the connections between the
Superterm POLL terminal strip and a modem.
Table 28 - Connection Table for Modem
Signal Superterm POLL
Pin#
Modem DB25-P
TXD 4 2
RXD 5 3
GND 6 7