INSTALLATION AND MAINTENANCE INSTRUCTIONS
3825 Ohio Avenue, St. Charles, Illinois 60174
1-800-SENSOR2, FAX: 630-377-6495
www.systemsensor.com/www.systemsensor.ca
BEFORE INSTALLING
Please read the System Smoke Detectors Application Guide, which provides
detailed information on detector spacing, placement, zoning, wiring, and spe-
cial applications. Copies of this application guide are available from System
Sensor. Observe guidelines for NFPA 72 or CAN/ULC S524 (depending on
location).
NOTICE: This manual should be left with the owner/user of this equipment.
IMPORTANT: Use only with compatible ULC-listed detector heads for proper
system function. The detector used with this base must be tested and main-
tained regularly following requirements of NFPA 72 or CAN/ULC S536 (de-
pending on location). The detector should be cleaned at least once a year.
IMPORTANT: Utiliser uniquement avec des détecteurs homologuées ULC
pour le bon fonctionnement du système. Le détecteur utilisé avec cette base
doit être testé et entretenu régulièrement en conformité avec les exigences de
la norme CAN/ULC S536. Le détecteur doit être nettoyé au moins une fois
par an.
GENERAL DESCRIPTION
The B501-WHITE, B501-IV, and B501-BL are plug in detector bases intended
for use in an intelligent system with screw terminals provided for power
(+ and –), and remote annunciator connections. Communication takes place
over the power lines (+ and –).
BASE TERMINALS
No. Function
1 Power (–), Remote Annunciator (–)
2 Power (+)
3 Remote Annunciator (+)
FIGURE 1. TERMINAL LAYOUT
TAMPER PROOF
TAB
TERMINAL 3
TERMINAL 2
TERMINAL 1
C0131-01
SPECIFICATIONS
Base Diameter: 4.0" (10.2 cm)
Base Height: 0.74" (18.8 mm)
Operating Temperature: Refer to applicable sensor Operating Temperature Range using the Base/Sensor Cross Reference Chart at systemsensor.com
Electrical Ratings – includes base and detector
Operating Voltage: 15 to 32 VDC
Standby Current: 150 µA
Listings: UL268, ULC S529
I56-3738-004
MOUNTING
This detector base mounts directly to 4" square with plaster ring, 3
1
/2" octa-
gon, 50 mm, 60 mm, and 70 mm centers.
INSTALLATION AND WIRING GUIDELINES (SEE FIGURE 2)
All wiring must be installed in compliance with all applicable local codes
and any special requirements of the local authority having jurisdiction. Proper
wire gauges should be used. The conductors used to connect smoke detectors
to control panels and accessory devices should be color-coded to reduce the
likelihood of wiring errors. Improper connections can prevent a system from
responding properly in the event of a fire.
For signal wiring (the wiring between interconnected detectors and modules),
it is recommended that the wiring be no smaller than 18 AWG (0.823 mm²).
Wire sizes up to 12 AWG (3.31 mm²) may be used with the base.
Alarm system control panels have specifications for allowable loop resistance.
Consult the control panel specifications for the total loop resistance allowed
before wiring the detector loops.
Make wiring connections by stripping about
3
/8" (10 mm) of insulation from
the wire end (use strip gauge molded in base). Then slide the wire under the
clamping plate and tighten the clamping plate screw. Do not loop the wire
under the clamping plate. (See Figure 3.)
Check the zone wiring of all bases in the system before installing the detec-
tors. This includes checking the wiring for continuity, correct polarity, ground
fault testing and performing a dielectric test.
The base includes an area for recording the zone, address, and type of detec-
tor to be installed at that location. This information is useful for setting the
detector head address and for verification of the detector type required for
that location.
Once all detector bases have been wired and mounted, and the loop wiring
has been checked, the detector heads may be installed in the bases.
FIGURE 2. TYPICAL WIRING DIAGRAM FOR 2-WIRE LOOP
(–)
(+)
+ -
UL/ULC Listed Compatible
Control Panel
CAUTION: Do not loop wire under terminal 1 or 2. Break wire run to
provide supervision of connections.
MISE EN GARDE : Ne pas boucler le fil sous la borne 1 ou 2.
Couper le fil pour assurer la supervision des connexions.
CLASS A OPTIONAL WIRING
REMOTE
ANNUNCIATOR
(–)
(+)
3
2
1
3
2
1
3
2
1
C0133-03
B501-WHITE, B501-IV, and B501-BL
4" Plug-in Detector Bases
1 I56-3738-004
03/07/2018
FIGURE 3.
C0473-00
TAMPER-RESIST FEATURE
NOTE: Do not use the tamper-resist feature if the removal tool is to be used.
The detector base includes a tamper-resist feature that prevents removal of the
detector without using a small screwdriver or similar tool.
To activate this feature, use needle-nose pliers to break the tab on the detector
base as shown in Figure 4A. Then, install the detector.
To remove the detector from the base once the tamper-resist feature has been
activated, insert a small-bladed screwdriver into the small hole on the side
of the base and push the plastic lever away from the detector head. (See
Figure 4B). This allows the detector to be rotated counterclockwise for re-
moval.
The tamper-resist feature can be defeated by breaking and removing the plas-
tic lever from the base. However, this prevents the feature from being used
again.
FIGURE 4A. ACTIVATE TAMPER-RESIST FEATURE
PLASTIC LEVER
BREAK TAB AT DOTTED LINE BY
TWISTING TOWARD CENTER OF BASE
SCREWDRIVER TO PRESS PLASTIC LEVER
IN DIRECTION OF ARROW
C0132-00
FIGURE 4B. DETECTOR REMOVAL
PLASTIC LEVER
BREAK TAB AT DOTTED LINE BY
TWISTING TOWARD CENTER OF BASE
USE SMALL-BLADED SCREWDRIVER TO PRESS
PLASTIC LEVER IN DIRECTION OF ARROW
C0132-01
System Sensor warrants its enclosed smoke detector base to be free from defects in ma-
terials and workmanship under normal use and service for a period of three years from
date of manufacture. System Sensor makes no other express warranty for this smoke
detector base. No agent, representative, dealer, or employee of the Company has the au-
thority to increase or alter the obligations or limitations of this Warranty. The Company’s
obligation of this Warranty shall be limited to the repair or replacement of any part of
the smoke detector base which is found to be defective in materials or workmanship
under normal use and service during the three year period commencing with the date of
manufacture. After phoning System Sensor’s toll free number 800-SENSOR2 (736-7672)
for a Return Authorization number, send defective units postage prepaid to: Honeywell,
THREE-YEAR LIMITED WARRANTY
12220 Rojas Drive, Suite 700, El Paso TX 79936 USA. Please include a note describing the
malfunction and suspected cause of failure. The Company shall not be obligated to repair
or replace units which are found to be defective because of damage, unreasonable use,
modifications, or alterations occurring after the date of manufacture. In no case shall the
Company be liable for any consequential or incidental damages for breach of this or any
other Warranty, expressed or implied whatsoever, even if the loss or damage is caused by
the Company’s negligence or fault. Some states do not allow the exclusion or limitation of
incidental or consequential damages, so the above limitation or exclusion may not apply
to you. This Warranty gives you specific legal rights, and you may also have other rights
which vary from state to state.
Please refer to insert for the Limitations of Fire Alarm Systems
REMOTE ANNUNCIATOR (RA100Z)
The remote annunciator is connected between terminals 1 and 3 using the
spade lug terminal packed with the remote annunciator. The spade lug termi-
nal is connected to the base terminal as shown in Figure 5.
It is not acceptable to have three stripped wires under the same wiring ter-
minal unless they are separated by a washer or equivalent means. The spade
lug supplied with the model RA100Z is considered an equivalent means. See
Figure 2 for proper installation.
FIGURE 5. CONNECTION TO REMOTE ANNUNCIATOR TERMINAL
STRIPPED WIRE
WIRE WITH SPADE LUG
C0116-00
System Sensor® is a registered trademark of Honeywell International, Inc.
NOTE: B501-WHITE, B501-IV, and B501-BL replace the previous model num-
bers B501 and B501A; all are functionally the same.
2 I56-3738-004
©2018 System Sensor. 03/07/2018
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