Honeywell CN34 Series Product Data page 3

CN20, CN34 SERIES DAMPER ACTUATOR FOR MODULATING AND FLOATING CONTROL
•
10-2V, modulating control; floating/2-position control, ccw
run
Fig.3. Function selection switch
Power-Off Behavior
If power is removed, the actuator retains its position.
Service/Off
If the function selection switch is set to the "Service/Off"
position, all rotary movement is cancelled, and all control
signals are ignored, thus allowing the actuator to be safely
manually operated.
Floating/2-Position Run Mode
If the function selection switch has been set to one of the four
positions (2-10V, 0-10V/Dir, 10-0V/Rev, 10-2V) – and the
actuator is wired as Floating/2-position mode (see A2 and A3)
– then as soon as operating power is applied, the actuator will
run clockwise or counterclockwise.
Control signal at
Terminal 3
open
open
24 Vac/dc
Control signal at
Terminal 3
24 Vac/dc
24 Vac/dc
Control signal at
Terminal 3
Open
< min. control signal plus 0.24V
between min. control signal plus 0.24V
and max. control signal minus 0.24V
> max. control signal minus 0.24V
Table 1. Shaft adapter behavior in the floating mode
Terminal 4
open
24 Vac/dc
open
Table 2. Shaft adapter behavior in the 2-position mode
Terminal 4
open
24 Vac/dc
Table 3. Shaft adapter behavior in the modulating mode
Terminal 4
open
24 Vac/dc
open
24 Vac/dc
proportional proportional
open
24 Vac/dc
open
24 Vac/dc
Modulating Run Mode
If the function selection switch has been set to one of the four
positions (2-10V, 0-10V/Dir, 10-0V/Rev, 10-2V) – and the
actuator is wired as modulating mode (see A1) – as soon as
operating power is applied, the actuator will run according to
the control signals applied. If terminal 5 is also wired, the
actuator will output the voltage feedback signal(0/2-10V)
proportional to actuator's actual position. Alternatively, if
terminal 4 is wired and powered on, actuator will override the
control signal and immediately come to a position of 0% of
max. stroke.
Table 1 describes the actuator behavior (stops, rotates CCW,
or rotates CW) for the floating mode in relation to the control
signals applied to terminals 3 and 4 and to the function
selection switch setting.
Table 2 describes the actuator behavior (stops, rotates CCW,
or rotates CW) for the 2-position mode in relation to the
control signals applied to terminals 3 and 4 and to the function
selection switch setting.
Table 3 describes the actuator behavior (stops, rotates CCW,
rotates CW, runs in proportional position, or runs to 0% of
max. stroke) for the modulating mode in relation to the control
signals applied to terminals 3 and 4 and to the function
selection switch setting.
Function selection switch settings
2...10V 0...10V /Dir
stops stops
CCW CCW
CW CW
Function selection switch settings
2...10V 0...10V /Dir
CW CW
CCW CCW
Function selection switch settings
2...10V 0...10V /Dir Service / Off 0...10V /Rev
-- --
0% (most 0% (most
left) left)
-- --
0% (most 0% (most
left) left)
0% (most 0% (most
left) left)
-- --
0% (most 0% (most
left) left)
3
Service / Off 10...0V /Rev
stops stops
stops CW
stops CCW
Service / Off 10...0V /Rev
stops CCW
stops CW
stop --
0%(most
stop
right)
stop --
0%(most
stop
right)
stop proportional proportional
0%(most
stop
right)
stop --
0%(most
stop
right)
EN0B-0341CH33 R0803A
10...2 V
stops
CW
CCW
10...2 V
CCW
CW
10...2 V
--
0% (most
right)
--
0% (most
right)
0% (most
right)
--
0% (most
right)