Honeywell EXCEL 10 Installation Instructions Manual page 7

EXCEL 10 W7754K,P,Q,R,S,T,V FCU CONTROLLERS − INSTALLATION INSTRUCTIONS
Table 6. W7754S,V Output assignments
OUT1
output
stage
type
19 20
0 -- OFF
1-stage
1 -- ON
PWM -- -- PWM
ON /
thermal -- --
OFF
Analog Inputs
The unit is equipped with two analog inputs (for connection to
a room sensor and to a wall module with temperature setpoint
adjustment, respectively).
Table 7. Analog input usage
analog input
AI1 room sensor
AI2 setpoint adjustment
1) If sensor measures a temperature outside range of 0...70
°C, this is interpreted as a sensor break / short circuit.
Analog Output
The W7754R, W7754T, and W7754V feature an analog
output which can be used to control

a variable speed fan, or

a proportional valve (provided that, via the LNS plug-in,
OUT1 has been configured for "PWM" and the fan has not
been configured for "variable speed fan"), or

a 6-way valve (provided that, via the LNS plug-in, OUT1
has been configured for "Not USED," OUT2 has been
configured for the "Changeover Mode" of type "Floating
Mid," and the fan is not using the analog output (no fan or
1...3-speed fan)).
Table 8. Analog output usage
voltage / current
resolution
NOTE: Connecting 24 Vac to the analog output will damage
the hardware.
AO
(W7754V,
OUT2
only)
21 22 12
-- OFF --
-- ON --
If OUT1 is con-
figured for "PWM"
and fan is not
-- PWM configured for
"variable-speed
fan", AO runs in
parallel to OUT1
ON /
-- --
OFF
wall module
1)
0...10 V, -1 / +5 mA
8 bit
Table 9. Use of the analog output
function fan
var.-speed fan var.-
speed fan
0...10 V actu- no fan or
ator with prop. 1...3-
characteristic speed fan
0...10 V actu- no fan or
ator with 1...3-
"floating mid" speed fan
characteristic
2...10 V actu- no fan or
ator with 6-way 1...3-
valve charac- speed fan
teristic
OUTPUT 1
10.0 V
AO (0...100% = 0...10 V),
no feedback on LonWorks network
5.0 V
no heat, no cool
0.0 V
100%
nvoCoolOutput
0%
nvoFCUStatus.output_position[0]
Fig. 7. Operational sequence with "floating mid
characteristic" on the analog output (0....10 V)
7
output output output
1 mode 1 type 2 mode
don't don't don't
care care care
heat, PWM don't
cool or care
change-
over
change- floating not used -
over mid
mode
not used - change-
over
mode
0% 0% 100%
nvoHeatOutput
100%
EN1B-0304GE51 R0916M
output
2 type
don't
care
don't
care
floating
mid