Honeywell R7426A User Manual

R7426A,B,C,D TEMPERATURE AND UNIVERSAL INPUT CONTROLLERS
63-2565 4
Fig. 2. R7426A,B typical wiring.
Fig. 3. R7426C,D typical wiring.
OPERATION
Main Temperature Control
The controller compares the actual temperature value
measured by the main sensor (I01) with the calculated setpoint
(CTRP1) and generates a proportional (X
w
) or proportional
plus integral (X
wi
) deviation signal. CTPR1 is the sum of the
compensation effect, the CPA and the unoccupied offset.
NOTE: All diagrams show proportional control action
only
. If
P+I control is in operation heating and cooling slopes
are not defined.
2515 16 17 18 19 20 21 22 23 24 26 27 28
R7426A
2
1112345678910 12
OFF
ON
13 14
L1
(HOT)
L2
+ –
CLOSE
OUT
OPEN
OUT
IO1
CPA/SPA
UNOCCUPIED
FREEZE
PROTECTION
OFF
ON
PLANT/
SYSTEM
OCCUPIED
MAIN
TEMPERATURE
SENSOR
LIMIT OR
CASCADE
SENSOR
COMPENSATION
SENSOR
+ –
IO2
O1
+ –
IO3
HONEYWELL
SERIES 61
ACTUATOR
2515 16 17 18 19 20 21 22 23 24 26 27 28
R7426B
2
1112345678910 12
OFF
ON
13 14
+ –
CLOSE
OUT
OPEN
OUT
CLOSE
OUT
OPEN
OUT
CLOSE
OUT
OPEN
OUT
IO1
CPA/SPA
UNOCCUPIED
FREEZE
PROTECTION
OFF
ON
PLANT/
SYSTEM
OCCUPIED
MAIN
TEMPERATURE
SENSOR
LIMIT OR
CASCADE
SENSOR
COMPENSATION
SENSOR
+ –
IO2
O1
+ –
IO3
M17483
1
2
3
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
TERMINALS 13 AND 14 ARE A SERIAL INTERFACE FOR A PANEL BUS.
RELATIVE HUMIDITY INPUT IS EQUAL TO 200 mV DIVIDED BY PERCENT RH.
O2 O3
3
L1
(HOT)
L2
1
1
HUMIDITY
SENSOR
+ –
XWRH
HONEYWELL
SERIES 61
ACTUATOR
HONEYWELL
SERIES 61
ACTUATOR
HONEYWELL
SERIES 61
ACTUATOR
2515 16 17 18 19 20 21 22 23 24 26 27 28
R7426D
M17446
2
1112345678910 12
OFF
ON
ON/OFF
OUTPUT
13 14
1
2
3
4
4
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
TERMINALS 13 AND 14 ARE A SERIAL INTERFACE FOR A PANEL BUS.
L1
(HOT)
L2
1
+ –
IO1
CPA/
SPA
0/2 TO 10 Vdc
OUTPUT
FREEZE
PROTECTION
OFF
ON
PLANT/
SYSTEM
COMPENSATION
SENSOR
+ –
+ –
IO2
O1
+ –
IO3
HONEYWELL
SERIES 70
ACTUATOR
RELAY
2515 16 17 18 19 20 21 22 23 24 26 27 28
R7426C
2
111234 5 678910 12
OFF
ON
13 14
1
3
L1
(HOT)
L2
+ –
IO1
CPA/SPA
0/2 TO
10 Vdc
OUTPUT
0/2 TO
10 Vdc
OUTPUT
0/2 TO
10 Vdc
OUTPUT
UNOCCUPIED
FREEZE
PROTECTION
OFF
ON
PLANT/
SYSTEM
OCCUPIED
MAIN
TEMPERATURE
SENSOR
LIMIT OR
CASCADE
SENSOR
COMPENSATION
SENSOR
+ –
+ – + – + –
IO2
O1
O2 O3
+ –
IO3
HUMIDITY
SENSOR
+ –
XWRH
HONEYWELL
SERIES 70
ACTUATOR
HONEYWELL
SERIES 70
ACTUATOR
HONEYWELL
SERIES 70
ACTUATOR
RELATIVE HUMIDITY OUTPUT (Xw). EQUAL TO 200 mV DIVIDED BY PERCENT RH.
RELATIVE HUMIDITY INPUT IS EQUAL TO 200 mV DIVIDED BY PERCENT RH.

Honeywell R7426A Specifications

General

Brand	Honeywell
Model	R7426A
Category	Controller
Language	English