COND SGA-A & SGA-D Manuel_EN Rev3.doc
Page 5 on 20
Rev: 03/08/2006
2.3.3.
Output Connections
Two analogue outputs are available from the COND SGA, proportional DC current and DC voltage.
The ranges available are as follows:
Output
Range
DC voltage
±10V
NB: Maximum Load on voltage ranges is 2mA
±5V
0
-
10V
0
-
5V
DC current
0 - 20mA
NB: Maximum impedance 500R
4
-
20mA
The DC current support both ‘sink’ and ‘source’ modes of operation.
Two jumpers JP1 & JP2 provide the means of selecting the desired mode.
Figure 2.4.
In
‘Sink’
mode the +ve end of the load is connected to the in15V supply on the COND SGA and the -
ve end is connected to the COND SGA output. The current through the load is ‘sunk’ by the COND SGA
towards ground (0V).
N.B. In this mode neither connection to the output load is electrically common to the load cell. Select this
option by fitting the two jumpers, JP1 and JP2 to the ‘outside’ positions (See Figure 3.2)
In
‘Source’
mode the +ve end of the load is connected to the COND SGA output and the current is ‘sourced’
by the COND SGA output through the load towards ground (0V). This mode has the advantage that the
negative output connection is common to the load cell ‘- Excitation’ terminal.
Select this option by fitting the two jumpers, JP1 and JP2 to the ‘inside’ positions (See Figure 3.2)
See Chapter 3 for Switch settings and details of SINK & SOURCE jumpers.
