Rice Lake Lift Truck/Pallet Jack Scales - CLS-Series - Manual (Page 33)

Board Replacement 29
5.2.4 Serial Communications
The four communications ports on the 920i CPU
board support full duplex RS-232, 20 mA output, or
RS-485 communications at up to 115200 bps.
To attach serial communications cables, route the
cable through the cord grip and ground the shield wire
as described in Section 5.2.3 on page 28. Remove the
serial connector from the CPU board and wire to the
connector. Once cables are attached, plug the
connector into the header on the board. Use cable ties
to secure serial cables to the inside of the enclosure.
Table 5-5 shows the pin assignments for Ports 1, 3,
and 4. Port 2 provides DIN-8 and DB-9 connectors for
remote keyboard attachment of PS/2-type personal
computer keyboards (see Figure 5-7). The DB-9
connector pin assignments for Port 2 are shown in
Ta b l e 5 - 6 ; s e e S e c t i o n 1 0 . 3 o n p a g e 1 0 9 f o r
information about the PS/2 keyboard interface.
Serial ports are configured using the SERIAL menu.
See Section 3.2.2 on page 33 for configuration
information.
An optional dual-channel serial communications
expansion card, PN 67604, is also available. Each
serial expansion card provides two additional serial
ports, including one port that supports RS-485
communications. Both ports on the expansion card
can support RS-232 or 20mA connections.
Figure 5-7. Interface Board Connections
Figure 5-8. Interface Board, Top View
Connector Pin Signal Port
J11 1 GND 1
for
Scanner
2 RS-232 RxD
3 RS-232 TxD
J9 1 GND / –20mA OUT 3
2 RS-232 RxD
3 RS-232 TxD
4 +20mA OUT
J10 1 GND / –20mA OUT 4
for
Junction
Box
2 RS-232 RxD
3 RS-232 TxD
4 +20mA OUT
5 RS-485 A
6 RS-485 B
Table 5-5. Serial Port Pin Assignments
DB-9 Pin Signal
2 TxD
3 RxD
5 GND
7 CTS
8 RTS
Table 5-6. DB-9 Connector Pin Assignments
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