1 ac wiring/installation, 2 edp and printer ports, 3 rs-232 communications – Rice Lake Intrinsically Safe User Manual
Page 65: 4 rs-485 communications, Ac wiring/installation, Edp and printer ports, Rs-232 communications, Rs-485 communications
320IS Installation Manual - Appendix B
59
8.3.1
AC Wiring/Installation
The
320IS
is to be permanently mounted with a readily accessible disconnect device incorporated in the building
installation wiring. All wiring is to be done in accordance with the National Electric Code (NEC).
8.3.2
EDP and Printer Ports
The indicator communicates with external devices through the
320IS
located in a remote location. The I/O board
serves as a gateway with several types of communication interfaces (RS-232, RS-422, RS-485, and 20mA current
loop). The following sections explain how to install and configure the communication interfaces to establish serial
communications with peripheral devices.
8.3.3
RS-232 Communications
To attach a PC or other device to the
320IS
’s RS-232 ports, select RS-232 standard in the indicator SERIAL menu
for the appropriate port (EDP and/or printer). EDP and printer ports should be configured separately. See Table 8-3
below for information on connecting RS-232 communications.
8.3.4
RS-485 Communications
To attach a PC or other device to the
320IS’
s RS-485 ports, select RS-485 standard in the indicator SERIAL menu
for the desired port (EDP and/or printer). EDP and printer ports should be configured separately. See Table 8-4
below for information on connecting RS-485.
Pin
Description (Sign)
1
Signal Ground (GND)
2
—
3
—
4
—
5
Receive Data (RXD)
6
—
7
—
8
Transmit Data (TXD)
Table 8-3. RS-232 Connections (CN2 and CN3)
Pin
Description (Sign)
1
Signal Ground (GND)
2
—
3
—
4
—
5
—
6
—
7
RS-485 line (A)
8
RS-485 line (B)
Table 8-4. RS-485 Connections (CN2 and CN3)