3M C960, Service Information

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3
Configuration
The Operating Modes and Message Delay Times of the A300 are set with jumper JMP1 and DIP switches
SW2 and SW3 located on the circuit board. Tables 1 and 2 list the switch settings.
Vehicle Detect Configuration
JMP1
Position A - Position A is the default selection for most installations.
Position B - Position B is used when an optional relay must be added to trigger the A300. An optional
relay may be required in cases where the HME or Panasonic intercom triggers an external service timer.
(See Figure 7)
Note:
When JMP1 is in position B, a +5Volt pull-up voltage is applied to VEH DET + (J9 terminal 8).
Then, a contact closure between VEH DET - (J9 terminal 9) and COM (J9 terminal 3, 6 or 11) will
initiate a vehicle detect trigger.
Mode Configuration
SW2
A description of each mode follows. Table 1 lists the DIP switch settings.
Message 4 External Trigger
When SW2 number 1 is ON, the fourth message can only be played to the outside menu speaker
when triggered from MSG4TRG, connector J9-10. The trigger signal should be a contact
closure from MSG4TRG to COM (i.e. fire alarm, etc.).
Automatic message Repeat
When SW2 number 2 is ON, the selected message(s) will continuously repeat when triggered by
a vehicle detect signal. The message(s) will stop when the vehicle detect signal is disengaged.
Note:
The Automatic Message Repeat will only work with a presence-type vehicle detector (i.e.
Loop detector, Sonic detector).
Vehicle Detect Trigger Polarity
When SW2 number 3 is OFF, the A300 will be triggered by a positive going (low to high)
vehicle detect signal. When SW2 number 3 is ON, the A300 will be triggered by a negative
going (high to low) vehicle detect signal.
Pulse/Presence Vehicle Detector
When SW2 number 4 is OFF, the A300 requires a presence-type vehicle detect signal (i.e. Loop
detector). When SW2 number 4 is ON, the A300 requires a pulse-type vehicle detect signal (i.e.
air switch).
Timer Trigger Polarity
When SW2 number 5 is OFF the TTL output at TIMER TRG, connector J9-12 will be a positive
going (0.8V to 5.0V) signal when triggered by a vehicle detect signal. When SW2 number 5 is
ON the TTL output at TIMER TRG will be negative going (5.0V to 0.8V) when triggered by a
vehicle detect signal.
Music Mode
When SW2 number 6 is ON, the A300 will play music at the menu speaker when a message is not playing.
The input music source must have its own balanced output power amplifier and volume control capable of
driving the 4 – 8 ohm balanced menu speaker. When SW2 number 6 is ON, the A300 will pass audio
from the music source to the menu speaker. When a vehicle triggers the A300, the music will be
interrupted while the greeter plays its message(s). The music will resume playing at the menu speaker 2
minutes after the vehicle detect signal is disengaged. Note:
Use this feature only with the 3M C921BA
Base Station.