NOTE: Where moisture may be a problem, use conduit sealing compound to prevent
moisture from entering the TS1 through electrical conduits.
FIGURE 3
2.4 RS-485 NETWORK BIASING AND TERMINATION
A proper installation of an RS-485 network will only have a resistive termination at each
end of the cable run. Therefore, a cable from the computer interface will be terminated at
the interface unit and at the last TS1 on the network. The BinMaster RS 232 to 485 inter-
face unit will have its internal NTR jumper ON and the last TS1 on the network will have
its TERM switch ON. All others should be OFF. The RS-232 to 485 interface provides
network bias and all TS1 units hardwired to it should have their BIAS jumpers OFF.
For a TS1 with a wireless modem which is driving a network of other TS1 or SmartBob
SBRXII units, the TS1 with the wireless modem should have its BIAS jumpers ON and its
TERM switch ON. All other TS1 units must have their BIAS jumpers OFF and except for
the very last unit on the network must have their TERM switches (in TS1) or NTR
switches (in SBRXII) OFF. The very last unit will have its TERM switch (NTR in SBRXII)
ON and its BIAS jumpers OFF.
Note: The
TERM
switch in the TS1 units performs the same function as the
NTR
switch
in the RS 232 to 485 interfaces, RSU or SBC consoles, or SBRXII Remote units.
RS 485 WIRING TO THE
NEXT TS1 or SBRII
RS 485 cable BELDEN 9463 or equiv.
RS 485 WIRING
FROM CONSOLE.
485 INTERFACE,
or PREVIOUS TS1
or SBRII
THE RS 485 WIRING MUST
BE IN A DAISY CHAIN WIRING
SCHEME TO THE PC BOARD
AT EACH UNIT. THE TERM
SWITCH AT EACH END OF
THE THE RS 485 WIRING
DAISY CHAIN SHOULD BE IN
THE ON POSITION. ALL TERM
SWITCHES IN BETWEEN
MUST BE IN THE OFF
POSITION.
Jamieson Equipment Company
www.jamiesonequipment.com
toll free 800.875.0280
