System 350 A350A/B Electronic Temperature Control Product/Technical Bulletin
3
A
dd-On Modules
The S350 Stage Modules, D350 Digital Temperature
Display Module, and Y350R Power Module connect
together and plug into the A350 via a connector on its
right side. The maximum number of add-on modules is
listed in Table 1.
Table 1: Maximum Number of S350 Stage
Modules per A350A/A350B
Power
Source
Number
of S350A
or S350C
Modules
Allowed
Number
of S350A
or S350C
Modules
(with
1 S350P)
Allowed
Number of
S350A or
S350C
Modules
(with
2 S350P)
Allowed
Y350R
9
6
4
External
Class 2
Transformer
9
8
7
Note:
For each S350P added, the number of S350A
or S350C Stage Modules that can be used
with a Y350R decreases by two. If an external
transformer is used, the number of S350A and
S350C Stage Modules used decreases by
one for each additional S350P.
S350A On-Off Stage Modules
S350A On-Off Stage Modules receive power, setpoint,
and sensor input from the A350 control. S350A Stage
Modules perform switching functions based upon the
A350’s setpoint and sensor information, with the offset
and differential selected at the S350A.
For more information on these modules, refer to the
System 350 S350 Temperature, S351 Humidity, and
S352 Pressure On/Off Stage Modules
Product/Technical Bulletin (LIT-930080).
S350C Slave Stage Modules
S350C Slave Stage Modules receive power and
sensor input from the A350 control. S350C Slave
Stage Modules perform switching functions based
upon the A350’s sensor information. (Setpoint and
differential are selected independently at the S350C.)
For more information on these modules, refer to the
System 350
TM
S350C Temperature Slave Stage
Module Product/Technical Bulletin (LIT-930084).
S350P Proportional Stage Modules
S350P Proportional Stage Modules receive power,
setpoint, and sensor input from the A350 control.
The S350P responds with an analog 0-10 VDC and
0-20 mA output signal. This is based upon the A350’s
setpoint and sensor information, with the offset,
throttling range, and minimum output selected at the
S350P.
For more information on these modules, refer to the
System 350
TM
S350P Proportional Plus Integral
Temperature Stage Module Product/Technical Bulletin
(LIT-930086).
D350 Temperature Sensor/Setpoint
Display Module
The D350 receives power, sensor, and setpoint
information from the A350. A 3-digit Liquid Crystal
Diode (LCD) gives continuous read-out of the sensed
temperature. Pushing the PRESS FOR SETPOINT
button on the front of the D350 causes the setpoint of
the adjoining A350 to be displayed.
Y350R Power Module
The Y350R provides a convenient method of powering
System 350 modules from a 120 or 240 VAC power
source. The Y350R supplies power to the modules.
See Figure 5 for a typical wiring diagram where a
Y350R is used to power the A350.
For more information on this module, refer to
System 350
TM
Y350R Power Module
Product/Technical Bulletin (LIT-930090)
.
