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I
nstallation and Wiring
The S350P Temperature Control is housed in a
compact NEMA 1 plastic enclosure designed for
standard 35 mm DIN rail mounting. The S350P 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 should surface mounting be required.
Note:
When mounting the S350P (or any
System 350 module) to rigid conduit, attach
the hub to the conduit before securing the
hub to the control enclosure.
!
CAUTION: Risk of Electrical Shock.
Disconnect the power supply before making
electrical connections to avoid electric shock.
MISE EN GARDE: Risque de décharge
électrique.
Débrancher l'alimentation avant de réaliser tout
raccordement électrique afin d'éviter tout risque de
décharge électrique.
!
CAUTION: Risk of Property Damage.
Do not apply power to the system before checking
all wiring connections. Short circuited or
improperly connected wires may result in
permanent damage to the equipment.
MISE EN GARDE: Risque de dégâts matériels.
Ne pas mettre le système sous tension avant
d'avoir vérifié tous les raccords de câblage. Des
fils formant un court-circuit ou connectés de façon
incorrecte risquent d'endommager
irrémédiablement l'équipement.
Install all wiring to conform to the National
Electrical Code and local regulations. For
maximum electrical rating of control, refer to the
label inside the control cover. Only use copper
conductors.
The S350P can produce a variable signal from
0 to 10 VDC or 0 to 20 mA. (Both outputs can
be used simultaneously.) Connections are
made to the terminal block located in the wiring
compartment at the bottom of the case.
Add-On Modules—S350P Proportional Plus Integral Temperature Stage Module Product/Technical Bulletin 7
Connections can be made to both the voltage
and milliampere outputs, allowing the S350P to
drive two outputs off the same RA or DA ramp
simultaneously. This feature can be used to
drive motor actuators of several different types
in a single application.
Table 2: Terminal Designations
Terminal
Designation
V
0 to 10 VDC output
COM
Common
I
0 to 20 mA output
A
djustments
Follow these procedures to set up the S350P for the
types of operation desired.
1. Remove S350P cover by loosening the
four cover screws (Figure 2).
2. Set the RA/DA operation mode jumpers to the
desired mode of operation. Position the
operation mode jumpers vertically for RA
(Reverse Acting) or horizontally for DA (Direct
Acting) (Figure 2).
3. Adjust the offset potentiometer to the number of
degrees from the A350 control's setpoint that
the S350P begins throttling. Clockwise rotation
increases offset.
4. Adjust the throttling range potentiometer to
desired setting. Rotate clockwise to increase
the throttling range.
Note:
Included with the S350P is a Celsius
scale throttling range decal. Refer to
the Throttling Range (Proportional
Band) section of this bulletin for decal
installation instructions.
If the S350P is to be used in proportional plus
integral mode, the initial throttling range
adjustment is seldom set below 6F° (3C°). A
narrow proportional band used in conjunction
with the integration may result in unstable
control.
5. If minimum output is required, set the minimum
output potentiometer (labeled MIN OUT) to the
desired position (Figure 2). Output can be read
with a voltmeter or can be adjusted using the
ten segment, front panel LED.
Terminal
Description
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