
AP-5131 Access Point Product Reference Guide
2-10
Ensure the cable length from the Ethernet source (host) to the power injector and AP-5131 
does not exceed 100 meters (333 ft.)
The power injector has no On/Off power switch. The power injector receives power and is 
ready for AP-5131 device connection and operation as soon as AC power is applied. 
2.6.1.3 Power Injector LED IndicatorsThe power injector demonstrates the following LED behavior under normal and/or problematic 
operating conditions:
For more information and device specifications for the Symbol power injector, refer to the Power 
Injector Quick Install Guide (Part No. 72-70762-01) available from the Symbol Web site or the AP-5131 
Software and documentation CDROM. 
LED AC (Main) Port
Green (Steady)  Power injector is receiving power from AC 
outlet.
Indicates a device is connected to the 
power injector’s outgoing Data & Power 
cable.
Green (Blinking) Output voltage source is out of range. The power injector is overloaded or has a 
short circuit.