Honeywell Excel 100C Installation Instructions Manual page 15

C-Bus Termination
Switch settings for C-Bus termination
XD505
XD508
middle
XD508
beg./end
Connection to modem
19
SHIELD
TxD YELLOW
20
RxD GREEN
21
+5 V
BLUE
22
CTS
23 VIOLET
not used
24
GND WHITE
25
26 DTR BLACK
DCD
27 BROWN
not used
28
Lightning Protection
The back of the Excel 100C housing is equipped with a rotary switch for the C-Bus
to set the bus termination appropriate for the communication speed (see Table 4
and figure below).
switch
setting
up
middle
down
NOTE: Modules listed in the "Compatibility" column are used in Excel
20/100B/500/600 Controllers.
This figure shows the connection between Excel 100C and modem via cable
XW571 (see page 31 for details).
2
3
4
5
6
7
20
8
22
Please check with your local Honeywell representative for information on lightning
protection.
EXCEL 100C INSTALLATION INSTRUCTIONS
Table 4. Switch settings and communication speed
communication
controller location
speed
max. 9.6 Kbaud -
max. 76.8 Kbaud middle of C-Bus
max. 76.8 Kbaud beginning or end of C-Bus XD508, XL20XD508
15
compatibility
XD505A, XL20XD
XD508, XL20XD508
EN1R-0144GE51 R1007