Table 4-1: Maximum distance for each communication protocol
(continued)
Communication protocol
Maximum distance
Ethernet (CAT5)
300 ft (91 m)
4.4.5
RS-485 serial port terminating resistors
To ensure correct communication with all hosts, place a 120-ohm terminating resistor
across the gas chromatograph (GC) serial port terminals on the RS-485 link. On a
multi-dropped link, install the terminating resistor on the last controller link only.
4.4.6
Installing and connecting to an analog modem card
The Rosemount 700XA has two slots (I/O Slot A and I/O Slot B) in the card cage for
installing an analog modem.
NOTICE
Rosemount MON2020 only recognizes Microsoft Windows
®
-compatible modems that
have all relevant drivers installed correctly.
NOTICE
Analog modems will only work with PSTN phone lines. Analog modems will not work with
VOIP networks.
The following four LEDs are provided on the modem for troubleshooting:
RI (Ring indicator)
This LED flashes when it senses a ring. This LED should only flash
once per connection, because the modem automatically answers
on the first ring.
CD (Carrier detect)
This LED glows green while connected to Rosemount MON2020.
RX (Receive)
This LED flashes while the gas chromatograph (GC) receives data
from Rosemount MON2020.
TX (Transmit
This LED flashes while the GC sends data to Rosemount MON2020.
Install the analog modem
Procedure
1. Start Rosemount MON2020 and connect to the gas chromatograph (GC).
2. Go to
Tools
→
I/O Cards...
.
The
I/O Cards
window displays.
3. Change the Card Type for the appropriate in/out (I/O) slot to Communication
Module - Modem.
4. Click
Save
.
Reference Manual
Installation and start-up
2-3-9000-744
June 2022
Rosemount 700XA
63
Summary of Contents for Rosemount 700XA
Page 1: ...Reference Manual 2 3 9000 744 Rev L June 2022 Rosemount 700XA Gas Chromatograph ...
Page 6: ...TxD TD or Sout Transmit data or signal out 6 ...
Page 30: ...Overview Reference Manual June 2022 2 3 9000 744 30 Emerson com Rosemount ...
Page 100: ...Installation and start up Reference Manual June 2022 2 3 9000 744 100 Emerson com Rosemount ...
Page 182: ...Operation and maintenance Reference Manual June 2022 2 3 9000 744 182 Emerson com Rosemount ...
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