Serial Communications Card; Local Operator Interface Port To Pc Comm Port Wiring; Rs-232) Communications - Emerson FloBoss 103 Instruction Manual

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5.4 Serial Communications Card

Revised August-2017
®
Windows operating system. A prefabricated operator interface cable is
available as an accessory. Refer to Figure 5-2.
The LOI port is intended for use with a PC running ROCLINK 800
software. This LOI port is compatible with EIA-232 (RS-232) levels.
Table 5-1 shows the signal routing of the Termination Board LOI port
connections to the PC Comm port. Note that the FB100's EIA-232 (RS-
232) transmit signal connects to the PCs receive terminal and vice versa.
Table 5-1. Local Operator Interface Port to PC Comm Port Wiring
LOI Signal
Transmit
Receive
Ready to Send
Common
Not Used
Common
A White
B Red
C Black (connects to LOI terminal block)
Figure 5-2. PC Comm Port Wiring
The EIA-232 communications card meets all EIA-232 specifications for
single-ended, RS-232 asynchronous data transmission over distances of
up to 15 m (50 ft). The EIA-232 (RS-232) communications card
provides transmit, receive, and modem control signals. The EIA-232
(RS-232) communications logic card activates Comm 2.
The EIA-232 (RS-232) communications card defaults are: 9600 baud
rate, 8 data bits, 1 stop bit, no parity, 10 millisecond Key On Delay, and
10 millisecond Key Off Delay. The maximum baud rate is 19,200 bps.
The EIA-232 (RS-232) communications card signals include RX, TX,
and RTS signal/control lines. Refer to Table 5-2.
Communications
FloBoss 103/104 Instruction Manual
LOI
Terminal PC Signal
TX Receive
RX Transmit
RTS
COM Ground
RP
COM
C
PC Comm
Port Pin
2
3
5
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