semaphore KINGFISHER PLUS+ Hardware Reference Manual page 111

Baud rate
Modulation
Carrier detect input
RTS/PTT output
Output impedance
Input impedance
Line termination
Line configuration
Line drive in multi-drop
configuration
Transmit output level
Receive level
Internal Power
Consumption
Transmission Distance
Isolation
Operating Temperature
Storage Temperature
Operating Humidity
Hardware Manual Version 7.16
Line/Radio Option Board Specifications
1200 Baud
FSK, CCITT V.23
Optical isolation
Active low or high
Min. input 2 mA (70 V
Optical isolation
Open collector output
Active low
30 V maximum / 20 mA maximum
DC
Microwave networks typically use a negative supply rail for the
carrier detect circuit. The more positive rail should be connected
to pin #6 (RTS/PTT) and the difference between the rails must
not exceed 30 V
30 kΩ
30 kΩ
600 Ω
2 or 4 wire
The port is not full duplex and cannot use the full duplex
functionality of a 4-wire configuration.
4-wire configurations eliminate the ability to communicate peer
to peer but allow an increased number of drops on one link.
10 drops for 2 wire
20 drops for 4 wire
-6 dBm (LINE-2)
-6 to -21 dBm software configurable (LINE-L)
-43 dBm to -9 dBm
20 mA from +5 V
Allowing 3dB for background noise and a 10dB fade margin, up
to 24dB of cable loss can be tolerated. Therefore, transmission
distance = 24 / cable loss per Km (dB). Note: if there are more
than 2 RTUs (or other devices) on the line, reduce the allowable
cable loss (24) by 1dB per additional RTU or device.
Maximum working voltage in respect to system earth/ground
must not exceed TNV-2 limits (80 V)
Transient voltage: 3.88 kV
-20 to +70 °C
-40 to +85 °C
5 to 95 % RH (non-condensing)
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Kingfisher Plus+ Hardware Manual
maximum)
DC
.
DC
Bus on backplane
DC
Page 111