Notifier AFP-300 Installation Manual page 145

Network Interface Board (NIB-96)
AFP-300/AFP-400 Installation PN 50253:C1 05/22/97
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Figure 5-6 shows the pinouts for SLC (P5) and EIA-485 (P4) connections on the
NIB-96 board. The EIA-485 circuit requires a serial connection. Connect only one wire
to each screw terminal.
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Table 5-5 contains the wiring specifications for wiring an SLC and an EIA-485 circuit:
Circuit Wiring Specifications
SLC Loop Supervised and power-limited
Maximum wiring distance: 10,000 feet at 12 AWG
Maximum loop current: 200 mA (short circuit) or 100 mA (normal)
Maximum loop resistance: 40 ohms
EIA-485 Supervised and power-limited
±5 volts peak-to-peak
Maximum wiring distance: 6000 feet at 14 AWG
Maximum circuit resistance: 40 ohms
Characteristic impedance of wiring: 120 ohms
Transmission rate: 2400 baud
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