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7.1 INSTALLATION CONFIGURATION 1
18 +
SIG 1
COM 2
CH 2
19 20 +
CH 3
21 LOAD 2
TRIP AMP
22 +
CH 4
23 -
-VS1
SIGNAL
COMMON
HAZARDOUS AREA
+VS1
CH 1
17 0 to 20mA
OR
4 to 20mA
SIGNAL
-VS1
SAFE AREA
16 +
4 CHANNEL ANALOGUE
RECEIVER TYPE SILBUS-RX4A
LOAD 1
DISPLAY
SILBUS NETWORK
+VS1
+VS1
+VE 14
-VE 15
-VS1
Figure 3 Installation configuration 1
This configuration allows the four channel analogue receiver to be located wholly within the
hazardous area and the connection of intrinsically safe circuits to its various ports. The
analogue outputs can be driven from a single or four different intrinsically safe sources
because of the segregation between the four analogue output channels. For the same
reason the power supply port can be driven from the same source as the analogue outputs
or from an entirely different intrinsically safe source without the need for an assessment of
voltage or current addition.
PARAMETER
Ui
Ii
Li
Ci
Uo
Io
Lo
Co
Lo/Ro
INSTALLATION CONFIGURATION 1 ENTITY PARAMETERS
ANALOGUE
POWER
SILBUS
DESCRIPTION
OUTPUTS
PORT
PORT
Max input voltage
30 volts
12.6 volts
12.6 volts
Max input current
3.3 amps
3.3 amps
3.3 amps
Input inductance
0uH
0uH
0uH
Input capacitance
0uF
0uF
0uF
Max output voltage
0 volts
0 volts
0 volts
Max output current
Max load inductance
Max load capacitance
Max cable L/R
Table 6 Installation configuration 1 entity parameters
CONSOLE
PORT
The table above lists the entity parameters awarded to the receiver by its certification for
this configuration, these parameters would need to be taken into account when conducting
an installation assessment in accordance with IEC60079-25.
As always, careful attention should be paid to the segregation of wiring in this configuration
as incorrectly segregated wiring could negate the segregation and safety of the receiver.
4 CHANNEL ANALOGUE RECEIVER
TYPE SILBUS-RX4A USER'S MANUAL
21 OF 24
120-208-12
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