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Cover Screws
(Quantity = 4)
Integration DIP Switch
Slow
Medium
Off
Fast
1 2 3 4
O
N
LD Indicator
(Percent of Output)
Figure 2: Interior View Illustrating S350P Features
Offset
The offset can be adjusted from 0 to 30F° (0 to 17C°).
The offset adjustment determines the amount of offset
between the A350's setpoint and where the S350P's
throttling range begins (refer to Figure 5). This
adjustment is made using the potentiometer marked
OFFSET located at the upper portion of the circuit
board (refer to Figure 2).
Mode of Operation
(Direct Acting or Reverse Acting)
When configured for Reverse Acting (RA) operation,
the analog output increases as the temperature drops
below the value of the A350's setpoint minus the
S350P's offset (refer to Figure 3).
When configured for Direct Acting (DA) operation, the
analog output increases as the temperature rises
above the value of the A350's setpoint plus the
S350P's offset (refer to Figure 3).
Select the RA/DA mode by positioning the operation
mode jumpers either vertically or horizontally (refer to
Figure 2). Position the operation mode jumpers
vertically for Reverse Action (RA) or horizontally for
Direct Action (DA).
As shipped from the factory, the RA/DA operation
mode jumpers are installed in the RA mode.
Add-On Modules—S350P Proportional Plus Integral Temperature Stage Module Product/Technical Bulletin 3
Module
Connector
THROT
MIN
OFFSET
RAN GE
OUTP UT
V C I
Operation Mode
Jumper Positions
Reverse
Acting
Direct
Acting
30
25
20
15
Throttling Range
Setpoint Minus
Figure 3: Direct or Reverse Acting Proportional
Bands Shown in "Proportional Only" Mode
(Shaded Area Shows Throttling Range Possibilities
from Minimum to Maximum)
Throttling Range (Proportional Band)
The throttling range can be adjusted from
2 to 30F° (1 to 17C°). Make the adjustment at
the throttling range potentiometer marked
THROT RANGE (refer to Figure 2 ).
10
10
RA
VDC
DA
5
5
0
0
10
5
5 10 15 20 25 30
Throttling Range
A350
A350
Setpoint Plus
S350P Offset
S350P Offset
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