L1 Bus Termination - Honeywell Q7055A Installation Instructions & User Manual

BUILDING NETWORK ADAPTER BNA-1C/2CS/2DN
XD508 compatible; bus termination
enabled
XD508 compatible switch position for
C-Busses equipped only with XL500
family controllers with bus termination
enabled. This switch position must be
used if the BNA device is installed at
the end of such a C-Bus.
5.4

L1 Bus Termination

This section applies to BNA 2DN devices only.
The required L1 bus EOLRs (End of Line Resistors)
can be connected externally onto each CH1 / CH2
connector.
When the L1 bus uses 18 gage, twisted pair, non-
shielded wire, the ends of the line should be
terminated with a 62 Ω ±10% 0,5 W carbon resistor
between each wire and ground.
When the L1 bus uses 24 gage, dedicated solid
copper pair, standard balanced telephone cable, the
ends of the line should be terminated with a
100 Ω ±5% 0,5 W carbon resistor between each wire
and ground.
For further information
termination, please refer to Honeywell DeltaNet
R7044 EXCEL PLUS CONTROLLER Application
Guide 74-2548, Rev.2/93.
22
regarding L1 bus
EN1B-0198GE51 R0801