Servomex DF-310E, Руководство оператора

Страница: 52 / 130

48 DF-310E Connecting to External Devices
EXT-2 -
EXT-1 -
EXT-2 +
UNUSED
UNUSED
LOOP -
EXT-1 + LOOP +
J5 J6
Figure 22: J5/J6 Connector Wiring
J6-1 EXT-1 + External Control Input (+)
J6-2 EXT-1 -
External Control Input (-)
J6-3 EXT-2 +
External Control Input (+)
J6-4 EXT-2 -
External Control Input (-)
Table 9: Remote Control Connector (J6)
While the display is in the normal O2 mode, a voltage of 5-28VDC applied to the appropriate
contact pairs labeled EXT 1 (+/-) or EXT 2 (+/-) will turn the sensor off. The oxygen sensor will
stay off until this potential is removed.
NOTE: Turning the sensor off in this way will make control of the sensor from the keypad
impossible. In addition, the Automatic Sensor off function is disabled.
NOTE: Controlling the sensor voltage in this way will disable the Automatic Sensor off function.
NOTE: The audible alarm normally associated with the sensor off function is disabled with this
option. See the wiring diagram in Figure 30.
7.4.2 Remote Pump Control – J6 Connector
The pump enables the analyzer to operate on gas sample streams between 2.0 psig vacuum and
2.0 psig positive pressure.
If the analyzer is equipped with a pump, it will also have a downstream Flow Control Valve
mounted in the bottom of the flow meter. When using the pump, always use this downstream
valve to control the gas flow rate and leave all up stream valves wide open.
If the pump is not in use, (positive pressure application) always control the gas flow with an
upstream valve or regulator and leave all down stream valves wide open.
CAUTION
Do not use an upstream valve to control flow if the analyzer is
operating on a pump.
The on-board pump, if equipped, is controlled from the Controls Menu. See the User Manual for
additional information.
Connections to power a remote pump are made through the PUMP – and PUMP + pins on
connector J4. The wires should be in a shielded cable (separate from the sensor signal) with the
shield attached to the frame ground. The pump cable should be of sufficient size for the required
run (see Table 10 below) and should not share the same conduit as the sensor cable. See the
wiring diagram in Figure 30.