User's Manual

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3. Installation
The RS485 RFID Reader must be connected to the RS485 bus using a dedicated cable. Pinout of the connectors
is described below. The connector used on the Reader is 10 pin MOLEX 5015681007.
Devices can be connected in a chain, so one device can be connected to another one.
The maximum number of devices in a chain is four.
Figure 3-1. Connectors pinout.
GPIO_XX corresponds to GPIO33 on the MCU
GPIO_YY corresponds to GPIO21 on the MCU.
Both GPIO’s can be configured by the user as an INPUT or an OUTPUT using the RS485 interface commands
contained later in this User Manual..
Note that connectors are described as INPUT and OUTPUT but they can be used interchangeably.
The mating Molex receptacle and terminal are Molex part numbers 5013301000 and 5013340100.