LNL-500
LNL-500 Quick Reference Guide
49305D
Page 2
© 2006 Bosch Security Systems, Inc.
1.2 Wiring
Configuration
Port
1
ISC
9-pin
25-pin
TXD/TR1+
pin 2
pin 3
RXD/TR1-
pin 3
pin 2
RTS/R1+
not used
not used
CTR/R1-
pin 7
pin 4
GND
pin 5
pin 7
Jumper together
4, 6 & 8
5, 6 & 20
This configuration will work for Direct Connect
(RS-232) and Lantronix Ethernet network
communications. With direct connect, or Dial-up
DIP switch 5 needs to be OFF, and with Lantronix,
DIP switch 5 needs to be ON.
Table 1: LNL-500 Pinout Connections
PORT 1, CONFIGURED AS
RS-232
TR1+
TR1-
GND
R1 -
R1 +
4-WIRE
TR- TR+ R- R+ SG
PORT 1, CONFIGURED AS RS-485
TXD/TR1+
RXD/TR1-
GND
CTS/R1 -
RTS/R1 +
TXD/TR1+
RXD/TR1-
GND
CTS/R1 -
RTS/R1 +
2-WIRE
TO RS232/RS485
CONVERTER
TO RS232/RS485
CONVERTER
To PC
RS-485
2-Wire
Configuration
RS-485
4-Wire
Configuration
RS-232
Direct
Connection
Figure 3: Upstream Host Communication Wiring (Port 1)
If Using A 12 VDC Power Source, Be Sure To Observe
Polarity.
VIN
GND
12 to 24 VDC
+
-
Figure 4: Power Source Wiring
Port 2 and Port 3
To configure all four downstream ISC ports as 2-wire RS-485, follow the 2-wire diagram and repeat on each set
of three terminators, TR2+, TR2-, GND and TR3+, TR3-, GND
Port 2/3
TR2+, TR2-
TR3+, TR3-
GND
To configure as a 4-wire RS-485 ports, follow the
4-wire diagram (Table 2).
Must terminate the RS-485 at each end-of-
line device.
Table 2: Ports 2-3, RS-485
