Toa FS-970 SERIES - Manual (Page 24)

24
9.4. Emergency Power Supply Panel DS-029B Connection
9.4.1. Battery connection
Internal Ni-Cd batteries are optional. Depending upon the output and number of power amplifier panels to use,
and the number of connected emergency remote control units, select the proper type of battery. After installing
the selected battery in the DS-029B, make connections. For battery selection, refer to p. 8 "About the
Emergency Power Supply".
After battery installation, connect the battery connector and set the battery using the battery selector switch
located on the right of the battery connector.
When using the NDC-2435, set the switch to the "3500 mAh" position.
When using the NDC-2460, set the switch to the "6000 mAh" position.
When not connecting any battery, set the switch to the OFF position.
OFF 3500 mAh 6000 mAh
CHARGE CURRENT
Important
• The emergency PA system automatically checks the battery voltage every 24 hours. Therefore, if you set the
switch to the "3500 mAh" or "6000 mAh" position without connecting the battery, a warning tone is sounded
simultaneously with the battery error indication.
• Note that pressing the DS-029B's check key immediately after the system has been installed and the power
supplied may display the battery error indication.
• To check the battery manually, charge the battery for 24 hours or more before checking.
9.4.2. About the Emergency Power Supply Panel's (DS-029B's) terminals
REMOTE (left) (+, –) terminals
• These terminals supply power for making emergency broadcast when the activation of the fire alarm terminal
or the depression of the emergency key is detected while the system is in standby mode due to a power
failure. They also supply power to the operation/control section in emergency broadcast mode.
• 24 VDC is output when the supply of AC power stops. It is not output while the AC power is supplied.
(Outputs from two batteries 1 and 2 installed in the DS-029B are combined into one 24 VDC output through
a diode.)
• These terminals are connected to both the [EMG DS CTRL (+)] and [GND] terminals of the terminal block on
the rear panel of the Junction Panel JP-0410.
OUTPUT (+, –) terminals
• Output 24 VDC when there is a 24 VDC input to the [REMOTE (right) (+, –)] terminal while the supply of AC
power stops. Note that the 24 VDC power is not output while the AC power is supplied or the system is in
standby mode due to a power failure.
• Outputs 1 and 2 provide 24 VDC from Battery 1, and Outputs 3 and 4 provide it from Battery 2.
• The OUTPUT terminals connect to the power amplifier panel's [24 VDC INPUT (+, –)] terminals.
REMOTE (right) (+, –) terminals
• When these terminals receive 24 VDC while the supply of AC power stops, 24 VDC is output from output
terminals 1-4. Note that the 24 VDC power is not output from output terminals 1-4 even if the 24 VDC power
is input when the AC power is supplied.
• REMOTE (right) terminals connect to the [EMG DS ACTI (+)] and [GND] terminals of the terminal block on
the JP-0410's rear panel.