Specification Sheet

P499 Series Electronic Pressure Transducers Product/Technical Bulletin
2
Application
P499 transducers provide several output options:
• 0.5 VDC to 4.5 VDC ratiometric
• 0 VDC to 10 VDC
• 4 mA to 20 mA
Pressure connections are available in two standard
styles:
• 1/4 in. SAE 45
°
flare (7/16-20 UNF) internal thread
fitting with Schrader® valve depressor (Style 47)
• 1/8-27 NPT external thread fitting (Style 49)
Contact your local Johnson Controls
®/PENN®
representative for more information on options
available for high-volume orders with specific
application requirements, including 316L stainless steel
construction and pressure ranges up to
1,764 psi (120 bar).
Typical applications include:
• HVAC and refrigeration applications
• chillers
• fan speed controls
• pumps and compressors
• agricultural applications
• industrial process control
Operation
Pressure applied to the P499 transducer acts on a
piezoresistive strain gauge, which is bonded with high-
temperature glass onto a stainless steel diaphragm.
The strain gauge translates media pressure into an
electrical signal. An Application-Specific Integrated
Circuit (ASIC) conditions and amplifies the signal. The
output signal varies in direct linear proportion to the
sensed pressure.
Dimensions
IMPORTANT: The P499 Series Electronic
Pressure Transducer is intended to provide an input
to equipment under normal operating conditions.
Where failure or malfunction of the electronic
pressure transducer could lead to personal injury or
property damage to the controlled equipment or
other property, additional precautions must be
designed into the control system. Incorporate and
maintain other devices, such as supervisory or
alarm systems or safety or limit controls, intended to
warn of or protect against failure or malfunction of
the electronic pressure transducer.
IMPORTANT: Le P499 Series Electronic Pressure
Transducer est destiné à transmettre des données
entrantes à un équipement dans des conditions
normales de fonctionnement. Lorsqu'une défaillance
ou un dysfonctionnement du electronic pressure
transducer risque de provoquer des blessures ou
d'endommager l'équipement contrôlé ou un autre
équipement, la conception du système de contrôle
doit intégrer des dispositifs de protection
supplémentaires. Veiller dans ce cas à intégrer de
façon permanente d'autres dispositifs, tels que des
systèmes de supervision ou d'alarme, ou des
dispositifs de sécurité ou de limitation, ayant une
fonction d'avertissement ou de protection en cas de
défaillance ou de dysfonctionnement du electronic
pressure transducer.
5/16
(8)
Maximum
1/8 in. 27 NPT External Thread (Style 49)
1/4 in. SAE 45 Flare Internal Thread
(7/16-20 UNF) with Depressor (Style 47)
o
See wire harness
ordering information.
FIG:P499dimen
2-11/16
(69)
1/2
(12)
7/8
(22)
Hex
Note: Transducer shown with Packard connectors.
Packard Connector Plug
with Wire Harness
Figure 2: Dimensions for P499 transducers
and wire harness with Packard connectors, in.
(mm)