
20
IMPORTANT:
•TheRS485portofthisunitisintendedforusewith4-linecommunications.
When connecting 2-line communication devices, make connections as shown in the fol-
lowing illustration.
A
TB
B
2-line
4-line
TARB
Twisted-pair cable (RS485, 2-line)
RA
•Whenmakingconnectionswith2-linecommunications,select“2-line”inthesetupmenu.
Refer to the Operating Instructions on the provided CD-ROM for further information about
the setup menu.
•ThestatusoftheRS485portisalwaysterminated.
•MakeconnectionssothatexcessiveforceisnotappliedtotheBNCcoaxialcableorthe
twisted-pair cable when they are connected.
•Themaximumtwisted-paircablelengthis1200m{3937feet}.
c Connect a LAN cable(category 5 or better, straight,STP*) to the network connectoron the
unit.
*Emodelonly
better, straight, STP*)
v Connect the power cord.
IMPORTANT:
•The12VDCpowersupplyshallbeinsulatedfromthecommercialACpower.
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