Rice Lake IQ 700 Configurable Weight Indicator - Manual (Page 13)

Installation and Wiring 9
2.10.1 Serial Port #1 Wiring: CPU KGR8924–1
Serial Port 1 is a bidirectional (full duplex) port supporting active/passive 20 mA, current loop, RS-232, or RS-485
communications.
Figure 2-11. Serial Port #1 Switch Location
Figure 2-12. Port #1 Switch Settings
NOTE: The pull-up and pull-down resistors shown in the RS485 wiring diagram (100 K Ω typical) should be installed
at the indicator. GND may be tied to TB2-5 and +5 VDC to TB2-4 on CPU board (KGR8924-).
U7 U4 U11
TB3
J2
TB5
6
5
4
3
2
1
SERIAL COMMUNICA
TIONS - 2
J11
J10
RX+ 20 mA passive port 1
RX+ 20 mA active port 1
RX- 20 mA passive port 1
TX- 20 mA port 2
TX+ 20 mA port 2
TX- 20 mA active port 1
GND or RX 20mA active port 1
TX+ 20mA active port 1
RX1 RS-232 duplex port 1
TX1 RS-232 duplex
TX2 RS-232 port 2
1
6
5
4
3
2
SERIAL COMMUNICA
TIONS - 1
1 6 5 4 3 2 1 7 8 9 10
DIGITAL OUTPUT
1
1 4 3 2 1 DIGITAL OUTPUT
U1
U10 U19 C15
U15
U22 U21
U8
U9 U13
TB4
TB2 GND LO HI
TO POWER SUPPLY
S1
3
4
1
2
RS232
20MA
RS485
ACTIVE
PORT 1 RECEIVE
PASS
S1
3
4
1
2
RS232
20MA
RS485
ACTIVE
PORT 1 RECEIVE
PASS
TX+ 20 mA passive port 1
TX- 20 mA passive port 1
TX+ 20 mA passive port 2
TX- 20 mA active port 2
RS-485
NOTE:
Passive 20mA requires U22 option
RS-485 option requires U21
TB2
TX+
TX-
RX-
RX+
TB4
PORT 1
4
6
5
3
RX+
RX-
TX-
TX+
(passive)
S1 – 2, 4 CLOSED
S1 – 1, 3 OPEN
ACTIVE 20 mA
TB5
TX+
TX-
RX-
RX+
TB4
PORT 1
1
2
3
4
RX+
RX-
TX-
TX+
(active)
S1 – 2 CLOSED
S1 – 1, 3, 4 OPEN
PASSIVE 20 mA
TB2
RX1
COM
TX1
PORT 1
3
5
2
Tx
SIG COM
Rx
S1 – 1 CLOSED
S1 – 2, 3, 4 OPEN
RS232 DUPLEX
TB2
PRINT
COM
TX1
PORT 1
10
5
2
SIG COM
Rx
S1 – 1 CLOSED
S1 – 2, 3, 4 OPEN
RS232 SIMPLEX
TB5
A
B
PORT 1
1
2
A
B
OPTION 5 ON
S1 – 3 CLOSED
S1 – 1, 2, 4 OPEN
RS485
MASTER
GND
+5
100 k Ohm
100
kOhm
TB3
REMOTE