User's Manual

Configuration and Installation
6
AXB-IRS4 IR/Serial Interface (4 Ports)
Wiring the AXB-IRS4
The serial, IR, AXlink, and power supply connectors are located on the rear panel of the AXB-IRS4
as shown in FIG. 5. The AXlink connector can also be used for RS-232 communications.
Wiring Guidelines
The AXB-IRS4 requires 12 VDC power to operate properly. The power can be supplied by the
AMX system's AXlink cable or with an optional 12 VDC power supply. The maximum wiring
distance between the control system and AXB-IRS4 is determined by power consumption, supplied
voltage, and the wire gauge used for the cable. The following table lists wire sizes and the
maximum lengths allowable between the AXB-IRS4 and control system. The maximum wiring
lengths for using AXlink power are based on a minimum of 13.5 volts available at the control
system's power supply.
If the AXB-IRS4 is installed farther away from the control system than recommended in the Wiring
Guidelines table, connect a 12 VDC power supply to the 2-pin 12 VDC PWR connector on the rear
panel.
Preparing/connecting captive wires
1. Strip 0.25 inch of wire insulation off all wires.
2. Insert each wire into the appropriate opening on the connector according to the wiring
diagrams and connector types described in this section. Do not tighten the screws excessively;
doing so may strip the threads and damage the connector.
FIG. 5 AXB-IRS4 rear panel connectors
GND
SER SER
IR
GND
GND
GND
IR IR
GND
SER
IR
SER
GND
GND
AXM / RX AXP / TX
GND
GND
PWR
12VDC
4
3
2 1
AXlink / RS-232
PWR
Do not connect power to the AXB-IRS4 until the wiring is complete. If you are using
power from AXlink, disconnect the wiring from the Card-Frame before wiring the
AXB-IRS4. If you are using an optional 12 VDC power supply, apply power to the
AXB-IRS4 only when the installation is complete.
Wiring Guidelines at 125 mA
Wire Size Maximum Wiring Length
18 AWG 938.97 feet (286.19 m)
20 AWG 594.06 feet (181.07 m)
22 AWG 370.37 feet (112.89 m)
24 AWG 233.46 feet (71.16 m)