User's Manual

Elpas Gen-2 IR Location Reader – Wiring Guide
RS-485 BUS/Stub Topology
The Elpas-2 RS-485 BUS may be wired using a BUS/Stub topology using 4-port EJB boxes (P/N: 5-EJB00001). This topology
supports data transmission between 1 RF Ethernet Reader (BUS-Master) and up to 15 BUS Slaves (IR Readers, I/Os,
RDUs…etc). Additionally the reader may be connected at any location along the RS-485 data BUS.
200M/650Ft: Max. BUS length 10M/30Ft: Max. Stub length 100 Ohm Termination: Required each end of the BUS
Recommended Cable Type: CAT5 Stranded (4x2x26AWG)
For Power: Use three twisted pairs (six conductors) between EJBs Use one twisted pair (two conductors) between each EJB and Reader.
For Data: Use one-twisted pair (two conductors)
RS-485 Daisy Chain Topology
The Elpas-2 RS-485 BUS may be wired using a Daisy Chain topology. This configuration supports data transmission between
1 RF Ethernet Reader (BUS-Master) and up to 7 BUS Slaves (IR Readers, I/Os, RDUs...etc).
The RF Ethernet Reader may be connected at any location on the RS-485 data chain as long as the power supply is connected
to the power BUS in close proximity to the RF reader.
100M/325 Ft: Maximum cable length 100 Ohm Termination: Required at each end of the daisy chain
Recommended Cable Type: CAT5 Stranded (4x2x26AWG)
For Power: Use one twisted pair (two conductors) For Data: Use one-twisted pair (two conductors)
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D-302086_V5/Aug. 09
W.E.E.E. Product Recycling Declaration
For information regarding the recycling of this product you must contact the company from which you orignially purchased it.
If you are discarding this product and not returning it for repair then you must ensure that it is returned as identified by your supplier.
This product is not to be thrown away with everyday waste.
Directive 2002/96/EC Waste Electrical and Electronic Equipment.