Austdac SILBUS-RX4A, User Manual

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6.1 ANALOGUE OUTPUT PORTS
Each analogue output is provided with two terminals for the connection of field wiring.
Each output is a 0-20mA or 4-20mA output. The output compliance is dependent on the
power supply voltage. With a power supply of 12.6 volts the maximum RL (including the
cable)
is 440Ω and if the power supply voltage is at the operating minimum of 7.5 volts the
maximum RL (including the cable)
is 185Ω.
ANALOGUE OUTPUT TERMINATIONS
OUTPUT TERM # LABEL DESCRIPTION
CH1
16 CH1_+IN CHANNEL 1 +VE OUTPUT
17 CH1_-IN CHANNEL 1 -VE OUTPUT
CH2
18 CH2_+IN CHANNEL 2 +VE OUTPUT
19 CH2_-IN CHANNEL 2 -VE OUTPUT
CH3
20 CH3_+IN CHANNEL 3 +VE OUTPUT
21 CH3_-IN CHANNEL 3 -VE OUTPUT
CH4
22 CH4_+IN CHANNEL 4 +VE OUTPUT
23 CH4_-IN CHANNEL 4 -VE OUTPUT
Table 3 Analogue output termination details
The analogue outputs are galvanically isolated from the SILBUS network port; this allows
the SILBUS-RX4A to be used in a variety of special ways that include connecting non-
intrinsically safe signals to the analogue outputs while the receiver is connected to an
intrinsically safe SILBUS network.
6.2 POWER INPUT PORT
The four channel analogue receiver operates from a nominal 12 volt DC supply. The
power supply operating range is from 7.5 volts through to 12.6 volts. The SILBUS-RX4A
consumes less than 12mA from the power supply. The table below shows the power input
port connection details.
POWER INPUT PORT TERMINATIONS
TERMINAL DESIGNATION DESCRIPTION
14 +VE 12V POWER VE INPUT
15 -VE 12V POWER SUPPLY –VE OR COMMON INPUT
Table 4 Power input port termination details
6.3 SILBUS NETWORK PORT
The SILBUS network port provides a means for the receiver to be connected to a SILBUS
network. Any connections to a SILBUS field bus network pair should be of a multi-drop
nature with spur lengths kept to a minimum. This will minimize any reflections and therefore
communications errors in the SILBUS network.
SILBUS NETWORK PORT TERMINATIONS
TERMINAL DESIGNATION DESCRIPTION
1 SIG SILBUS NETWORK SIGNAL
2 COM SILBUS NETWORK COMMON
Table 5 SILBUS network port termination details
The table above shows the SILBUS network port connections.