TESTO REXS, User Manual

Page: 23 / 42

6 Setting up and installation
23
Warning:
System may work at pressures up to 500 mbar. Tubing and concerned parts
have to be tested up to withstand a pressure of 1.0 bar. Make sure that the test
bench tubing and DUT are leak free up to 1.0 bar.
Emergency Stop

The external emergency stop plug X112 is bridged when delivered and ready for stand
alone operation. When using an additional external emergency stop contact, e.g. a global
test stand stop, open plug X112 and remove the bridge between pin
1 and 3 . Solder the
wires leading to the external emergency stop contact to pin 1 and 3 of the plug X112. Re-
assemble the plug.
Note:
Pin 1 and 3 are bridged on delivery. This enables stand-alone operation of the
testo REXS.
Refer to chapter 4.7, Back panel connector, for contact specifications.
Warning:
The external emergency stop must provide an isolated, floating opening contact
(normally closed, NC) and comply with the specific regulations. Safe operation is
not guaranteed if an unsuitable external emergency stop is used.
Caution:
Use a shielded cable of max. 30 m length. Connect the shielding to the
connector housing. Conductor cross-section has to be 0.25 to 0.5 mm
2
.
Test bench run / standby control

testoREXS may to be controlled with an external run/standby signal, e.g. provided by the
test bench control unit.testo REXS provides a state signal indicating whether soot
nanoparticles are being emitted or not. To access these signals, open plug X111. Remove
the bridge between pin 1 and 2. The test bench control signal („RUN“ = closing contact)
has to be connected to pin 1 and 2. The testo REXS state signal may be accessed at pin
3 and 4 („RUNNING“ = opening contact), or pin 3 and 5 („RUNNING“ = closing contact).
Note:
Pin 1 and 2 at plug X111 are bridged on delivery. This enables stand alone
operation of testo REXS.
Refer to chapter 4.7, Back panel connector, for contact specifications.
Note:
When the external test bench control contact is open, testo REXS switches to
standby mode. When the external test bench control contact is closed, testo
REXS switches to the last operation point selected.
Caution:
Use a shielded cable of max. 30 m length. Connect the shielding to the
connector housing. Conductor cross-section has to be 0.25 to 0.5 mm
2
.
Computer or notebook connection

testo REXS provides a drawer with a power socket, an EIA-232 serial connection to the
testo REXS control unit and a RJ45 Ethernet connection to the backside of testo REXS.

To use a notebook in the notebook drawer to control testo REXS, connect the shielded
serial cable, length <30 m, to a free serial port of your computer. To use a desktop PC to
control testo REXS, disconnect the serial cable from the 9 pin sub-D connector X115 on
the testo REXS control insert back panel and connect the external serial 9 pol cable to
connector X115 on the back panel.

To set up a connection from the notebook in the notebook drawer to a computer network,
connect the built in RJ45 plug to the network interface connector of the notebook and