Johnson Controls System 350 A350A User Manual

4
System 350 A350A/B Electronic Temperature Control Product/Technical Bulletin
D
imensions
Mounting Slots
for No. 6 Screws
DIN Rail
Mount
Conduit
Hole
(75)
3/16 (4)
1/2 (13)
2 15/16
1 9/16
(40)
2 3/8 (61)
1 3/16 (31)
7/8
(22)
7/16 (11)
9 3/4 (248)
Sensor
1/4 (6)
7/8
(22)
3 (76)
2 3/8 (61)
5 (127)
4 (102)
Figure 3: A350A/B Control Dimensions, in. (mm)
I
nstallation and Wiring
The A350A/B Temperature Control is housed in a
compact NEMA 1 plastic enclosure designed for
standard 35 mm DIN rail mounting. The A350A/B is not
position sensitive but should be mounted for convenient
wiring and adjustment. Four key-slot mounting holes on
the back of the control case are provided for surface
mounting. Add-on modules must plug into the right side
of the A350A/B control.
Note: When mounting the System 350 modules to rigid
conduit, attach the hub to the conduit before
securing the hub to the control enclosure.
!
WARNING:
Risk of Electrical Shock.
Disconnect power supply before
wiring connections are made to
avoid electrical shock or damage
to equipment.
•
All wiring must conform to the National Electrical
Code and/or local regulations.
Note: For maximum electrical rating of control, see
label inside the control cover or
Specifications
section. Use copper conductors only.
•
Consult the typical wiring diagrams (Figures 4 and 5)
for proper wiring and terminal designations.
A350A/B
D350
S350A
Sensor
Load
Load
L
L
24
VAC
1
1
2
2
24V
COM
VDC
SEN
Note: If sensor is mounted less than 50 ft
(15.2 m) from the A350A/B,
shielded cable is not required.
Figure 4: Typical Wiring Diagram for A350A/B
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Johnson Controls System 350 A350A Specifications

General

Brand	Johnson Controls
Model	System 350 A350A
Category	Temperature Controller
Language	English