Bird Technologies 3171B020 - Manual (Page 43)

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Appendix 3 User Applications and Wiring
This section is a collection of user specific applications and the wiring information required to activate them.
Connector Assignment
Table 1-20 BNC Jacks
Table 1-21 Terminal Strip
Connection Description Function Levels
RF Power Input
Forward/Reflected
DC Input Forward &
Reflected
Detected RF signals
from sensors
30 μA full scale into
1400 Ω (42mV). May be
overranged to 100mV
Main Meter
Forward/Reflected
DC Main Meter Drive
Output
Current to drive
indicating meters
30mA full scale into
1400W (42mV)
Remote Meters
Forward/Reflected
DC Remote Meter
Drive Output
Voltage to drive
remote indicating
meters
1.038V full scale (use
33.2k resistor in
series with standard
Bird 30mA meters
Connection Description Function Levels
TB1(+),
TB2(-)
External 12V Supply Used to allow mobile
operation
See Figure 18 on
page 35 for connection
information
TB3,4 Auxiliary Alarm Inputs Signals to trip alarms
from external sources
TTL levels, active low.
Pulled up to 5V by
4.7k internally.
Shunted to ground by
0.1 μF capacitor.
TB5 5V Output Regulated 5V out put Can supply 360mA max.
TB6 Alarm Output Low when alarm is
sounding, returned
high by reset
Active low. Pulled up to
5V by 4.7k. Will sink
1.5A and source 1mA.
TB7 Ground Chassis ground Reference for signals.
TB8 Reset Input /Output Input to reset Wattcher
from external source.
May be used as an
output to reset other
equipment when
Wattcher is reset by the
front panel switch.
TTL levels, active low.
Pulled up to 5V by
4.7k internally.
Shunted to ground by
10 μF capacitor.
TB9 Confirm Output Low when forward
power exceeds the
users confirm set point
Active low. Pulled up to
5V by 4.7k. Will sink
1.5A and source 1mA.
TB10 Active Forward
Monitor Input
(Carrier On) Indicates to the
Wattcher that the RF
is on and that forward
power should be
monitored for a low
condition. There is an
adjustable internal
delay on the leading
edge of this signal.
TTL levels, active low.
Pulled up to 5V by
4.7k.