
PIBV2 and PIBV2A
Post Indicator/Butterfly Valve 
Supervisory Switches
General
System Sensor’s PIBV2 and PIBV2A supervisory switches monitor the open position of post indicator and butterfly control valves.
Robust construction. The PIBV2(A) consists of a rugged 
housing, intended for indoor and outdoor use. When installed 
with the actuator in the vertical position, the PIBV2(A) is NEMA 
3R rated per UL.
Application flexibility. The PIBV2(A) features a flexible 
design that accommodates post indicator, butterfly, and many 
other types of wall post, recessed wall post and pressure 
reducing valves. The PIBV2(A)’s unique bi-directional actuator 
allows the unit to be installed in either rising or falling flag 
installations.
Simplified operation. Installation is made easier with the 
PIBV2(A)’s single-side conduit entrance. By providing a direct 
conduit pathway to the electrical source, right angle fittings are 
not required. Installation is further simplified by the PIBV2(A)’s 
adjustable length actuator, which eliminates the need for cutting the shaft.
Reliable performance.
resistant cover screws to prevent unauthorized entry. Inside, two 
sets of SPDT (Form-C) synchronized switches are enclosed in a 
durable terminal block to assure reliable performance.
 The PIBV2
(A)
 is equipped with tamper
DN-1785:A1 • I-510
Conventional Initiating Devices
1785ph1.png
Features
• NEMA 3R rated enclosure.
• Bi-directional actuator accommodates rising or falling flags.
• Single-side conduit entry does not require right-angle fittings.
• Adjustable length actuator eliminates the need for cutting 
the shaft.
• Accommodates up to 12 AWG (3.31 mm²) wire.
• Two SPDT contacts are enclosed in a durable terminal 
block for added strength.
• 100% synchronization activates both alarm panel and local 
bell simultaneously.
Specifications
Contact ratings: two sets of SPDT (Form-C). 10.0 A @ 125/ 
250 VAC, 2.5 A @ 24 VDC.
Overall switch dimensions: 4.25" H x 3.5" W x 3.25" D (10.8 
cm x 8.9 cm x 8.2 cm).
Maximum stem extension: 3-5/32” (8.0 cm).
Mounting: 1/2" NPT nipple. Acceptable PIBV2(A) mounting
positions: actuator vertical (pointing DOWN), or actuator horizontal. The following mounting position is NOT accept- 
able: actuator vertical (pointing UP).
Conduit entrances: one single side open for 1/2" conduit.
Operating temperature range: 32°F to 120°F (0°C to 49°C).
Enclosure rating:
with the actuator vertical.
 UL indoor/outdoor; NEMA 3R when mounted
Cover tamper switch: standard with ULC model PIBV2A; 
optional for UL model, P/N 546-7000.
Shipping weight: 2 lbs. (0.9 kg).
Service use:
– Automatic Sprinkler: NFPA 13. 
– One or Two Family Dwelling: NFPA 13D. 
– Residential Occupancies up to 4 stories: NFPA 13R. 
– National Fire Alarm Code: NFPA 72.
U.S. Patent No.: 5,213,205
Engineering Specifications
Model shall be model number PIBV2(A) Post Indicator Butterfly Valve supervisory switch as manufactured by System Sensor. PIBV2(A) shall be installed on each valve as designated 
on the drawings and/or as specified herein. Switches shall be 
mounted so as not to interfere with the normal operation of the 
valve and shall be adjusted to operate within two revolutions 
of the valve control or when the valve flag has moved no more 
than one-fifth of the distance from its normal position. The 
mechanism shall be contained in a weatherproof die cast 
metal housing, which shall provide a side entrance for 1/2" 
conduit and incorporate a 1/2" NPT nipple for attachment to 
the valve body. A grounding provision is provided. The switch 
assembly shall include two switches each with a rated capacity 
of 10.0 A @ 125/250 VAC and 2.5 A @ 24 VDC. The cover 
shall contain tamper-resistant screws for which a security 
wrench will be provided with each switch. PIBV2 
Underwriters Laboratories listed for indoor or outdoor use. The 
PIBV2
(A)
 shall be Factory Mutual, CSFM, and MEA approved.
(A)
 shall be
DN-1785:A1 • 1/12/10 — Page 1 of 2

Agency Listings and Approvals
The listings and approvals below apply to the PIBV2 or 
PIBV2A supervisory switches. In some cases, certain modules 
may not be listed by certain approval agencies, or listing may 
be in process. Consult factory for latest listing status.
• UL/ULC  Listed: file S739.
• ULC Listed: file CS169 (model PIBV2A).
• CSFM approved: file 7770-1209:149, 7770-1653:118.
• FM approved.
• MEA approved: file 427-91-E, 167-93-E.
• BSA approved: file 750-76-SA.
Wiring Diagrams
supervisory switch supervisory switch
BB
to nonsilenceable
initiating zone of
Listed FACP
1785w2a.wmf
1785w2a.wmf
to power source
compatible with bell
COM COM
TYPICAL FACP CONNECTION
B
COM
TYPICAL LOCAL BELL CONNECTION
Product Line Information
PIBV2: Post Indicator/Butterfly Valve supervisory switch.
PIBV2A: ULC model, Post Indicator/Butterfly Valve supervi-
sory switch.
546-7000: Cover tamper switch kit.
BB
COM COM
local
bell
BREAK WIRE as shown for 
supervision of connection. 
DO NOT allow stripped
wire leads to extend
beyond switch housing.
DO NOT loop wires.
end-of-line 
resistor
1785w3a.wmf
Page 2 of 2 — DN-1785:A1 • 1/12/10
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of this document is strictly prohibited.
This document is not intended to be used for installation purposes.
 We try to keep our product information up-to-date and accurate. 
We cannot cover all specific applications or anticipate all requirements. 
All specifications are subject to change without notice.
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