User's Manual

Page 32

General Installation Guidelines

Installation Issues:

o Use Category 5 cabling for a RS-485 network

o Use Category 5 shielded cabling for a 10Base-T or 100Base-T Ethernet network

and Category 5E cable for Gigabit (1000Base-T) Ethernet and beyond

o Choose one twisted pair of conductors to use for RS-485 differential

connection, other conductors should be used for Signal Ground (Black with

Red stripe from Veri-Series)

o For Ethernet, use a straight-through cable when connecting DTE (V-Station, PC,

etc) to DCE (Switch, Hub, Repeater, etc). Use a crossover cable when

connecting DTE to DTE or DCE to DCE

o RS-232/RS-485 Converter must support “sense data” to switch from send to

receive mode

o If placing a V-Station on a RS-485 network, be sure to set the switch in back to

“RS-485 enable”

o Before connecting each unit to the network, do the following:

v Configure the reader using the auxiliary port (RS-232) and a PC (or

directly from the console if a V-Station)

§ Set Network ID to a unique number

§ If a V-Station on Ethernet, set its IP address explicitly, or use DHCP

§ Set host port to RS-485

§ Set host port baud rate to 9600 bps

v Check each unit/cabling for ground fault before connecting to RS-485

network

v Each unit should have its ESD Shield Ground (Green with Yellow stripe)

connected to Earth Ground (EGND connection on V-Station)

v Once all units are configured and connected to the RS-485 network, the

baud rate can be increased to highest supported rate (some

experimentation required)

Network Operation Issues:

o Do not use auxiliary port when RS-485 network is active

o Unit will return a “busy” signal (error –104) if communication cannot be

processed due to current processing – usually enroll or verify