Servomex DF-310E, Руководство оператора

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46 DF-310E Connecting to External Devices
5. Remove the circuit board assembly from the cabinet.
6. Remove the four screws that hold the sheet metal cover in place. Remove the cover and
set aside.
7. Locate jumper # JP14 in the center, directly below the relays in the upper third of the
board.
8. Using the information in Table 7, place a jumper (short) between the appropriate pins to
obtain the desired full scale output.
9. Reassemble and install the circuit boards back into the analyzer.
10. Reconnect all cables and power up the analyzer.
11. From the Diagnostics Menu, select Test Output, and set the output to 100% full scale.
12. With a DVM, confirm that the analog output voltage is proper. If it needs to be adjusted
slightly, use the potentiometer located third from the top on the front of the circuit board,
above the Servomex symbol.
Full Scale Output Voltage Jumper Number
5.0 VDC None
10.0 VDC 14
Table 7: Analog Output Voltage Jumpers
7.3.2 4-20mA Output
The optional fully-isolated 4-20mA output is completely isolated from all other analog outputs
and from earth ground. The maximum loop resistance is 1K
 The 29-33 VDC compliance
voltage is provided. Connections are made at pins J5-1 (LOOP+) and J5-2 (LOOP-) at the back
of the instrument.
EXT-2 -
EXT+1 -
EXT-2 +
UNUSED
UNUSED
LOOP -
EXT-1 + LOOP +
J5 J6
Figure 20: J5/J6 Connector Wiring
J5-1 LOOP + 4-20 mA
J5-2 LOOP - 4-20 mA Output -
Table 8: 4-20 mA Analog Current Loop Connector (J5) Pin Out
7.3.2.1 Sensor Off 4-20mA Signal
If configured at the time of order, the optional 4-20mA output described above can be reduced to
2mA when the Sensor is either turned off manually or turned off automatically due to extended
(30 minute) off scale oxygen readings. Use of this function provides information than could be
interpreted remotely as an alarm or non-standard condition. See page 66 for additional
information on the Sensor Off function.