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Trade Number
Numbe
UL NEC Type
r of
CSA
Pairs
Certification
88102
2
NEC CMP CSA
Notes:
If RS-485 communication is used, an RS-232 to RS-485 converter is required at the host
workstation.
The 2-wire configuration is recommended over the 4-wire for RS-485.
TXD/TR1+
RXD/TR1-
RTS/R1 +
CTS/R1 -
GND
PORT 1,
CONFIGURED as RS-232
Wire with 24 AWG stranded
Port 1 – wiring configuration. This configuration will work for Direct connect (RS-232) and Lantronix
Ethernet network communications. With direct connect and with Lantronix, DIP switch 5 needs to be ON.
ISC
9-pin connector
TXD/TR1+
pin 2
Belden Wire Specifications
Nominal
Shield
D.C. R.
Conductor
24.0 ohms/M
15.5 ohms/M
78.7 ohms/
50.9 ohms/km
km
Upstream Host Communication Wiring (Port 1)
TERMINATE RS-485 END OF BUS
4-WIRE
CONFIGURED AS RS-485
Wire with 24 AWG stranded twisted pair with shield
25 – pin connector
pin 3
Hardware Installation Guide
Nominal
Nominal
Impedance
Capacitance
(Ohms)
pF/feet
100
12.95
TR1+
TR1-
R1 +
R1 -
GND
TR1+
TR1-
R1 +
R1 -
GND
GND TR- TR+ R-
R+
PORT 1,
pF/
meter
42
Earth
Ground
81
revision 7 —
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