Johnson Controls System 350 Technical Bulletin page 2

A
pplication
The S350A, S351A, and S352A Stage Modules
receive power, setpoint, and sensor input from the
respective System 350 control modules. When
connected, the individual modules act as a multistage
control system.
The maximum number of stages that can be used in a
system varies with the control module type
(temperature, humidity, or pressure) and stage module
design.
Refer to Table 1 or Table 2 to determine the maximum
number of stages that may be used with each control
module. When mixing stage module designs, always
use the lower number.
Note: When using an external transformer, the
Y65 Series or other 40 VA Class 2
transformers are recommended.
Table 1: Maximum Number of Add-on
Modules when Powered by a Y350R
Power Module
Control Stage
Module Module
No.
Numbers
A350A
9 S350As or S350Cs
A350B
6 S350As or S350Cs
A350E
with 1 S350P
4 S350As or S350Cs
with 2 S350Ps
A350P
4 S350As or S350Cs
2 S350As or S350Cs
with 1 S350P
A350R
9 S350As or S350Cs
A350S
6 S350As or S350Cs
with 1 S350P
4 S350As or S350Cs
with 2 S350Ps
W351A
5 S351As
W351P
4 S351As
P352AB
5 S352As
P352PN
4 S352As
2
S350A Temperature, S351A Humidity, and S352A Pressure Stage Modules Product/Technical Bulletin
Display
Module
Model No. Model
Number
1 D350
1 D350
2 D350s
1 D351
1 D351
1 D352A
1 D352A
Table 2: Maximum Number of Add-on
Modules when Powered by an External
Transformer
Control Stage
Module Module
No.
Numbers
A350A
9 S350As or S350Cs
A350B
8 S350As or S350Cs
A350E
with 1 S350P
7 S350As or S350Cs
with 2 S350Ps
A350P
9 S350As or S350Cs
8 S350As or S350Cs
with 1 S350P
7 S350As or S350Cs
with 2 S350Ps
A350R
9 S350As or S350Cs
A350S
8 S350As or S350Cs
with 1 S350P
7 S350As or S350Cs
with 2 S350Ps
W351A
9 S351As
W351P
9 S351As
P352AB
9 S352As
P352PN
9 S352As
Notes: This bulletin only refers to the S350A, S351A,
and S352A Stage Modules.
For information on the S350C refer to the
TM
System 350 S350C Temperature Slave
Stage Module Product/Technical Bulletin
(LIT-930084).
For information on the S350P refer to the
TM
System 350 S350P Proportional Plus
Integral Temperature Stage Module
Product/Technical Bulletin (LIT-930086).
For information on the D350, D351 and D352
refer to the System 350
Modules Product/Technical Bulletin
(LIT-930070).
Display
Module
Model No. Model
Number
1 D350
1 D350
2 D350s
1 D351
1 D351
1 D352A
1 D352A
TM
D350 Display