Bosch SP-SVC Specsheet
Fire Alarm Systems | SP‑SVC Supervised Volume Control
SP‑SVC Supervised Volume Control
www.boschsecurity.com
u Compatible with UL864 Listed 24 V supervised
notification appliance circuits (NACs)
u Compatible with Class B wiring, and with Class A
wiring when used with the SP4‑APS Addressable
Paging Splitter
The Cooper Wheelock SAFEPATH4 SP‑SVC Supervised
Volume Control is used with the SP40/2 or SP40S
Facility Communications Systems along with the
SPB‑80/4, SPB‑160, or SPB‑320 Audio Power Boosters
to control the volume of a single speaker, multiple
speakers, or an entire audio loop up to 35 W. An
integrated override relay bypasses the volume
attenuator in alarm conditions allowing the emergency
notification message to be announced at maximum
volume.
Notice
This model is recommended for use with
70.7 VRMS supervised audio systems, but can be
used in 25.0 VRMS systems if the speaker load is
reduced to 4 W.
Certifications and approvals
Cooper Wheelock, Inc. holds these Listings and
Approvals:
u Adjustment settings (0 to 10) in 3 dB increments
u Selected adjustment does not affect volume setting
of pre-recorded emergency messages or live
microphone usage
u Maximum RMS current of 10 mA
Region
Certification
USA UL UOQY: Emergency Communication and
Relocation Equipment (UL864, 9th edition), UOXX: Control Unit Accessories,
System (UL864, 9th edition)
CSFM see our website
Installation/configuration notes
Compatibility Information
The supervised volume control is compatible with the
following SAFEPATH4 products:
Category Product ID Product Description
Communications
Systems
SP40/2 Facility communications system
(red)
SP40/2‑B Facility communications system
(black)
SP40S Facility communications system
(red)
SP40S‑B Facility communications system
(black)
2 | SP‑SVC Supervised Volume Control
Power Boosters SPB‑80/4 Supervised audio power
booster (80 W) with strobe
power
SPB‑160 Supervised audio power
booster (160 W)
SPB‑320 Supervised audio power
booster (320 W)
Splitters SP4‑APS Addressable paging splitter
SP4Z‑A/B Supervised speaker audio
splitter
Notice
Do not use the supervised volume control on
coded systems in which the applied voltage is
cycled on and off.
Mounting Considerations
The supervised volume control can be mounted on a
3.5‑inch deep double‑gang box or on a 4‑inch square
box with a 1.5‑inch deep extension ring and a
double‑gang ring.
Notice
Orient the supervised volume control so that the
number 5 is at the top.
Wiring Considerations
Notice
Maximum wire impedance between devices
cannot exceed 35 Ω.
The terminal block accepts up to eight wires (one for
each terminal) from 18 AWG to 12 AWG (ISO 0.75 mm
to 4 mm2).
Switch position 3: -22
Switch position 4: -19
Switch position 5: -16
Switch position 6: -13
Switch position 7: -10
Switch position 8: -7
Switch position 9: -4
Switch position 10: 0
Notice
Insertion loss is less than 0.5 dB.
Audio Power Ratings
Maximum Load at 25 VRMS: 4 W
Maximum Load at 70.7
VRMS:
35 W
Trademarks
All hardware and software product names used in this
document are likely to be registered trademarks and
must be treated accordingly.
Ordering information
SP‑SVC Supervised Volume Control
The SP‑SVC is used to control the volume of a single
speaker, multiple speakers, or an entire audio loop up
to 35 W. An integrated override relay bypasses the
volume attenuator in alarm conditions allowing the
emergency notification message to be announced at
2
maximum volume.
Order number SP-SVC
Parts included
QuantityComponent
1 Volume control
1 Literature – Installation Instructions
Technical specifications
Electrical
Current (RMS maximum): 10.0 mA
Voltage (input): 16.0 VDC or VRMS to 33.0 VDC or
VRMS
Attenuation (Total – approximate)
Switch position 0: OFF
Switch position 1: -28
Switch position 2: -25
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