Power Connections - Valcom V-9940 User Manual

of the unit. Provisions for mounting to a single
or double gang junction box are provided.
See Figure 5.
Open the V-9940 enclosure to allow access to
connections and option switches. Slide the rear
of the unit (contains the board) onto the
mounting plate. Lock enclosure to mounting
plate with screw provided. Make connections.
Replace cover and lock in place with #6 ½ inch
screws provided.

Power Connections

NOTE: Power is required for each V-9940
being used. If multiple units are used, power
for additional units may be multiplied from
pins 14 and 15 of a previous unit (pin 14 is
"+" and pin 15 is "-").
•
Unplug power supply.
•
Connect -24VDC "B" battery (may be
referred to as "-" or "signal battery") from
power supply to pin 30 on V-9940 and "B"
ground "+" or "signal" ground) from power
supply to pin 29.
•
Connect -24VDC Ground from power supply
to telephone system Ground.
ON
OFF
1 8
15 1
30 16
FIGURE 2
LOCATION AND NUMBERING OF
PUNCHDOWN BLOCK AND DIP SWITCHES
•
Dip
 a. Plug in power supply.
Switches
 b. If power reversal LED is lit:
1.
2.
3
•
PABX Connecting Arrangements:
NOTE: From the list below, determine the
Power
Reversal
arrangement being used and proceed to the
Indicator
Figure indicated for step-by-step
Punchdown
instructions.
Block
•
•
•
5
Figure 4 Dip Switch Settings
SW OFF
1 Audio Sense Time Out
Enable
2 Not 1 Sec. 1 Second
3 Not 64 Sec. 64 Seconds
4 Not 32 Sec. 32 Seconds
5 Not 16 Sec. 16 Seconds
6 Not 8 Sec. 8 Seconds
7 Not 4 Sec. 4 Seconds
8 Loop Detect Loop Detect
Disable
1 2 3 4 5
ON
OFF
Power Test:
Unplug power supply.
Reverse connections on pins 29, 30.
Repeat step 5.
Unplug power supply.
One Zone of One-Way Paging: Go to
Figure 6.
Multi-Zone One-Way Paging with All Call
(Multiple Talkpaths): Go to Figure 7.
One Zone of Handsfree Paging: Go to
Figure 8.
ON
Enable
Enable
6 7 8