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Lon Works Termination - Honeywell Excel 10 W7752D User Manual

Fan coil unit controllers lns plug-ins
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Table 14. Output assignments of Excel 10 W7754 FCU Controller for various actuator types
output type
floating
1-stage
2-stage
3-stage
PWM
thermal
L
W
Termination
ON
ORKS
One or two L
W
terminations are required, depending
ON
ORKS
on the given LonWorks bus layout.
Double termination is required only when the network is a
daisy-chain configuration and the total wire length is greater
than 1640 ft (500 m). The max. lengths described in Step 2
must be adhered to for either a daisy chain or free topology
L
W
layout. See Fig. 17 for connection details for a
ON
ORKS
doubly terminated bus. See Fig. 18 for connection details for
a singly terminated bus.
Two different L
W
termination modules are available:
ON
ORKS
L
W
termination module, order no.:
ON
ORKS
L
W
connection / termination module (mountable
ON
ORKS
on DIN rails and in fuse boxes), order no.:
4
3
removable screw-type
3-pole terminal block
L
L
O
O
N
N
Fig. 16. L
W
connection and termination module
ON
ORKS
stage
19
--
close
0
--
1
--
0
OFF
1
OFF
2
ON
0
OFF
1
OFF
2
ON
3
ON
--
--
--
--
209541B
XAL-Term
3
4
1
5
shield
shield
0
6
LON
plug-in
Termination
jumper
FTT/LPT Bus
FTT/LPT Free
Park Position
EXCEL 10 FCU CONTROLLER LNS PLUG-INS USER GUIDE
OUT1
20
open
OFF
ON
OFF
ON
OFF
OFF
ON
OFF
ON
PWM
ON/OFF
NOTE: The Q7750A Zone Manager has an internal ter-
mination circuit, although jumpers are required at the
terminal block to connect it. See form number 95-
7509 for details.
Fig. 17. Termination Module connections for a doubly-
Fig. 18. Termination Module connections for a singly-
23
OUT2
21
close
--
--
OFF
OFF
ON
OFF
OFF
ON
ON
--
--
terminated FTT network
terminated FTT network
EN2B-0285GE51 R0909
22
open
OFF
ON
OFF
ON
OFF
OFF
ON
OFF
ON
PWM
ON/OFF

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