7
CHAPTER 1: Specifications
Transmission
Distance —
(4-wire point-to-point, 26-AWG twisted pair)
Speed (bps)
Distance
1200
4 miles (6.4 km)
2400
3 miles (4.8 km)
4800
2.3 miles (3.68 km)
9600
1.7 miles (2.72 km)
19,200
1.2 miles (1.92 km)
38,400
0.9 mile (1.44 km)
56,000
0.8 mile (1.28 km)
64,000
0.75 mile (1.2 km)
112,000
0.55 mile (0.88 km)
128,000
0.35 mile (0.56 km)
Interface Pinouts —
RS-485
Pin
Name
TX A
TX B
Transmit Data Pair
RX A
RX B
Receive Data Pair
