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P/N 10-4226-501-DB70-02 • ISS 23MAR21
EN: Installation Sheet
Description
DB702 and DB702U Mounting Bases are used with the Dx700
series of conventional fire detectors.
Figures 1 and 2 show the following:
1. Fire alarm control panel
2. Continuity switch
3. First detector
4. Remote indicator device
5. End-of-line device
6. Last detector
The bases feature a continuity link between LINE IN (1) and
LINE OUT (2) terminals of the conventional detector circuit.
The base is supplied with the link in closed position. This lets
you connect the zone circuit using only the bases, without
generating a fault message display at the panel.
Caution:
For general guidelines on system planning, design,
installation, commisioning, use, and maintenance, refer to
standard CEN/TS 54-14 and to local regulations.
Installing a detector in the base opens the continuity link.
Removing a detector does not automatically close the link. This
means that the panel generates a fault message when a
detector is removed.
To reset the continuity link, insert a screwdriver under the link
(Figure 3), and press up until it clips back into place (Figure 4).
Some detectors in the Dx700 series are available with a built-in
relay capability that allows the detector in alarm mode to
activate external equipment. The relay contacts (NC, C, and
NO) are shown in Figure 1.
Table 1 gives the terminal descriptions for both models.
Table 1: Terminal descriptions
Terminal
Description
1
Line in (positive)
2
Line out (positive)
3
Line common (negative)
4
NC or remote LED (negative)
5
C
6
NO
Wiring
Figures 1 and 2 show the following:
All heads are polarity insensitive. Standard wiring layout for the
detector line is shown in Figure 1 (from left to right):
•
Standard detector wiring
•
Standard detector wiring with remote indicator
•
Standard detector wiring with relay wiring
Wiring for connecting multiple detectors to a single remote
indicator is shown in Figure 2.
Maintenance
Basic maintenance of the base consists of a yearly inspection
only. Do not modify the wiring.
Specifications
Number of terminals
DB702
DB702U
6
6
Earth contact
No
Remote indicator option
Yes
IP rating
IP30
Temperature
Operating
Storage
Relative humidity
−10 to
+55°C
−10 to +70°C
10 to 95% noncondensing
Colour
White
Dimensions (Ø × H)
DB702
DB702U
100 × 9 mm
152 × 15 mm
Weight
DB702
DB702U
42 g
101 g
Regulatory information
Manufacturer
Thunderous Sounders Electronics Co. Ltd.,
No, 21, Kai Fe 3rd, Pao En Industrial Area,
Ren De Village, Tainan, Taiwan, R.O.C.
Authorized EU manufacturing representative:
Carrier Fire & Security B.V., Kelvinstraat 7, 6003
DH Weert, Netherlands.
Certification
Contact information and product
documentation
For contact information or to download the latest product
documentation, visit firesecurityproducts.com.
Product warnings and disclaimers
THESE PRODUCTS ARE INTENDED FOR SALE TO AND
INSTALLATION BY QUALIFIED PROFESSIONALS.
CARRIER FIRE & SECURITY B.V. CANNOT PROVIDE ANY
ASSURANCE THAT ANY PERSON OR ENTITY BUYING ITS
PRODUCTS, INCLUDING ANY “AUTHORIZED DEALER” OR
“AUTHORIZED RESELLER”, IS PROPERLY TRAINED OR
EXPERIENCED TO CORRECTLY INSTALL FIRE AND
SECURITY RELATED PRODUCTS.
For more information on warranty disclaimers
and product safety information, please check
https://firesecurityproducts.com/policy/product-
warning/ or scan the QR code:
