Johnson Controls A350P Application Information

Application Note A350P
Issue Date December 31, 2004

APPLICATION NOTE

A350P Proportional Temperature Control

of Johnson Controls® VA-7152 and VA-8052 Valve Actuators

IMPORTANT: Use the A350P temperature control

only as an operating control. Where failure or
malfunction of the A350P control could lead to
personal injury or property damage to the controlled
equipment or other property, additional precautions
must be designed into the control system.
Incorporate and maintain other devices such as
supervisory or alarm systems or safety or limit
controls intended to warn of, or protect against,
failure or malfunction of the A350P temperature
control.

A350P

I

V

SN

VDCC24V

Application

The A350P proportional temperature control can
control VA-7152 and VA-8052 series valve actuators.
Applications can use a common 24 VAC power supply
(Figure 1 and Figure 2) or a Y350 power module and a
separate power supply transformer for the actuator
(Figure 3 and Figure 4).

A350P

I

V

SN

VDCC24V

Sensor

L1

L2

Class 2

Note: Terminals 2 and 3 are connected internally as
common on V A- 7152 series actuator s.

Figure 1: Wiring an A350P Controller to a VA-7152

Valve Actuator Using a Common Transformer to

Power the Application

1 2 3 4
VA-7152

VA-7152_COM_TRANS

Sensor

L1

L2

Class 2

AC

VA-8052

COM

IN

VA-8052_COM_TRANS

Figure 2: Wiring an A350P Controller to a VA-8052

Valve Actuator Using a Common Transformer to

Power the Application

Table 1: Johnson Controls Actuator Terminals
Wired to a Common Power Supply

A350P Control

Terminal

C
24V
V
Note: Terminals 2 and 3 are connected internally as

common on VA-7152 series actuators.

IMPORTANT: Always maintain polarity when
wiring A350P controls to VA-7152 and VA-8052
actuators. Failure to maintain polarity can result in
damage to the A350P control and the actuators.

VA-7152

Terminal

VA-8052

Terminal

2, 3 COM
1 AC
4 IN

© 2004 Johnson Controls, Inc. 1
Code No. LIT-9305008 www.johnsoncontrols.com

R

R

A350P

I

V

SN

120
VAC

L1

L2

Class 2

Note: Terminal s 2 and 3 are co nnected internally as
common on VA-7152 se r ie s actuators.

1 2 3 4

VA-7152

Y350

VDCC24V

Sensor

VA-7152_TRANS_ MODULE

Figure 3: Wiring an A350P Controller and Y350

Power Module to a VA-7152 Valve Actuator with a

Separate Power Supply Transformer

VDCC24V

IN

Y350

Sensor

VA-8052_TRANS_MODULE

L1

L2

Class 2

120
VAC

A350P

AC

VA-8052

I

V

COM

SN

Figure 4: Wiring an A350P Controller and Y350

Power Module to a VA-8052 Valve Actuator with a

Separate Power Supply Transformer

Table 2: Johnson Controls Actuator Terminals
Wired to Separate Power Supply

A350P Terminal VA-7152

Terminal

C
V

2, 3 COM
4 IN

VA-8052

Terminal

Note: Terminals 2 and 3 are connected internally as

common on VA-7152 series actuators.

Controls Group

507 E. Michigan Street
P.O. Box 423 Published in U.S.A.
Milwaukee, WI 53201

www.johnsoncontrols.com

2 A350P Proportional Temperature Control of Johnson Controls VA-7152 and VA-8052 Valve Actuators
Application Note