Federal Signal Corporation SelecTone 300VSC-1, Руководство по установке и обслуживанию

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Installation and Maintenance Manual
Model 300VSC-1 and Model 300VSC-1044SB SelecTone Command Units
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Table 1 Product specifications (continued)
Remote Contact Closure Outputs
Tone 1, Tone 2, Tone 3, Tone 4, Sig. Out, Aux., Test and Cancel Relays
Type Dry contact closure
Rating 24 Vdc, 1 A, resistive
Signal to Noise Ratio (< 3% THD)
Local PA 60 dBA
Remote Mic 40 dBA
Aux Input 80 dBA
Audio Distortion From Aux Input to Balanced Signal
Line Output (40 Ω load) 2 %
Fuses
F1 Type GMC-1, 1 A, 250 V
F2 Type GMC-1/2, 1/2 A, 250 V
Dimensions and Weight
Model VSC-1
Weight 4.125 lb (1.88 kg)
Dimensions (WDH)
10.5 in x 9.25 in x 2.44 in
26.67 cm x 23.50 cm x 6.20
Model VSC-1044SB
Weight
7.9 lb (3.58 kg)
Dimensions (WDH)
19.0 in x 10.0 in x 3.5 in
48.26 cm x 24.40 cm 8.89 cm
Recommendation for the Signal Lines
REDUCED SOUND OUTPUT
—
If too small a diameter cable is used, unacceptable
signal voltage drop in the signal line will cause reduced sound output from the
remote signal device. Only use a cable having wire diameter greater than 22 AWG.
The signal lines transfer tone signals and verbal messages from the 300VSC to the remote SelecTone
devices. To reduce the possibility of cross talk, hum, and static-noise pickup, the signal lines must be
twisted-pair, shielded audio cable. In the majority of systems, use AWG 18 shielded twisted-pair audio
cables. Federal Signal does not recommend that new or existing telephone lines be used as signal lines in a
SelecTone system for the following reasons:
✓
Interference from other services or systems, or interference from the system to other services
✓
Cross talk, interference, or hum induced by other telephone lines
✓
Extended downtime because of the second party involvement required to service the lines
✓
The additional cost of installation, interfacing devices and monthly charges as opposed to a one-time
cost of performing the installation