QTech Data Systems QDR Digital 900MHz Radio - Manual (Page 6)

QDR – QTech Digital Radio – Owners Manual – v1.3 – August 2012 6
www.qtech.co.nz Tel: 03 3663713
3.5 RS485 Serial Port – RJ12 Socket
This is used to connect to RS485 devices in either half or full duplex modes.
Refer to applications.
Spare RS485 cables are available, P/N CB-QDR-RS485.
Note – The RS485 cable differs depending on whether connecting to a XL4
RTU (RJ12 to RJ12) or another device (RJ12 to RJ10), the respective P/N are
CB-QDR-RS485-XL4 & CB-QDR-RS485.
4.0 Status Indicators
There are three status indicators on the QDR.
Colour Meaning Description
Green Status Indicates radio status
Yellow RxD Received valid (RF) data packet
Orange TxD Transmitted a packet
Notes
RxD LED blinks upon receiving a valid packet. A packet is valid if the Customer-ID
and Site-ID in the received packet are equal to the receiving radios Customer-ID and
Site-ID. The packets must also have a valid checksum.
Status LED issues 6 fast flashes to indicate that the QDR has been reset/repowered.
The Status LED flashes slowly to indicate the QDR processor is running correctly.