5-6
AFP-400 Installation
PN 50253:A2 03/12/96
Network Interface Board, continued
8 7 6 5 4 3 2 1 6 5 4 3 2 1
EIA-485
Loop In
+
P4 EIA-485
SLC and EIA-485 Connections
Circuit
Wiring Specifications
SLC Loop
supervised and power limited
maximum wiring distance: 10,000 feet at 12 AWG
maximum loop current: 200mA (short circuit) or 100mA (normal)
maximum loop resistance: 40 ohms
RS-485
supervised and power limited
±5 volts peak-to-peak
maximum wiring distance: 4000 feet at 14 AWG
characteristic impedance of wiring: 40 ohms
transmission rate: 2400 baud
Wiring Specifications
Wiring Specifications
SLC and EIA-485
Connections
The EIA-485 circuit requires a serial connection. Connect only one wire to
each screw terminal.
No
connection
SLC
Loop Out
shield
+
SLC
Loop In
EIA-485
Loop Out
+
Earth ground
Earth ground
P5 SLC
