PHS/PCS300 SERIES INSTALLATION GUIDE
75 Discovery Way • Acton, MA 01720 • Tel (978) 795-1285 • Fax (978) 795-1111 • www.phoenixcontrols.com
©2014 Phoenix Controls Specifications subject to change without notice. Rev. C 650-321-017 08/16 PCS300 SERIES INSTALLATION GUIDE 1 OF 12
MODELS PHS300-x, PCS300-x, and PCS300-x-DOS
(where -x defines the enclosure style)
Section 1. Product Description
The PHS300-x is a room humidity sensor. The PCS300-x is a
combination temperature and humidity room sensor. The PCS300-x-
DOS has a large LCD display, slider setpoint adjustment, and override
button.
Depending on model, the analog outputs are a humidity sensor output
(defined in the table below), a 10 KΩ type 2 thermistor sensor,
0-20 KΩ temperature setpoint, and an override contact. All units come
standard with a 3.5 mm (1/8"), easy access communication jack
providing direct network access. All PCS units also include an internal
three position Low/Normal/High test and balance switch.
Figure 1. PHS300-x and PCS300-x sensors only
Figure 2. PCS300-x-DOS with display, override, and
slider temperature setpoint
Section 2. General Installation
Requirements
For proper installation and subsequent operation of each controller,
pay special attention to the following recommendations:
• It is recommended that the sensor(s) be kept at room temperature
for at least 24 hours before installation to allow any condensation
that may have accumulated due to low temperature during
shipping/storage to evaporate.
• Upon unpacking the product, inspect the contents of the carton
for shipping damages. Do not install damaged controllers.
• Allow for proper clearance of sensor enclosure, wiring terminals
and hardware configuration and maintenance.
• Each controller is designed to operate under the following
environmental conditions:
• Ambient temperature from 32°F to 122°F (0°C to 50°C)
• Relative humidity from 0% to 95%, non-condensing
• Ensure proper ventilation of each sensor and avoid areas where
corroding, deteriorating or explosive vapors, fumes or gases may
be present.
• Do not drop the sensor or subject it to physical shock.
If the controller is used and/or installed in a manner not specified by
Phoenix Controls, the functionality and the protection provided by the
sensor may be impaired.
Model Humidity Sensor Signal
PHS300-x Default: 4-20 mA
Field selectable to: 0-5 or 0-10 Vdc
PCS300-x Default: 4-20 mA
Field selectable to: 0-5 or 0-10 Vdc
PCS300-x-DOS Default: 4-20 mA
Field selectable to: 0-5 or 0-10 Vdc
CAUTION
Any type of modification to any Phoenix Controls
product will void the product's warranty.
NOTE
Take special care to keep the front and back plate aligned
when separating and joining them.
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