User manual

GMC-I Messtechnik GmbH 13
➃ Unscrew the feet from the bottom of the housing. Remove
the rubber inserts from the feet to this end. The screws are
then exposed.
➄ If you would like to electrically connect the two
KONSTANTERs, use the “mains jumper cable” and “RS 232
bus cable” accessories.
➅ Install the two devices to the rack. Save all loose parts for
possible future use.
The KONSTANTERs must be attached to guide rails at both sides
of the rack. The guide rails, as well as the front panel mounting
screws used to secure the KONSTANTERs, are rack-specific and
must be procured from your rack supplier.
2.1.3 Combining Benchtop Devices
Up to 3 benchtop KONSTANTERs can be stacked in combination
(see also chapter 5 for electrical connection options via the analog
interface).
➀ Unscrew the feet from the bottom of the housing. Remove
the rubber inserts from the feet to this end. The collar screws
are then exposed.
Four oblong slots now become visible at the bottom of the
housing.
➁ Turn the 4 collar screws from the feet into the 4 threaded
holes on the top of the other device housing. Save the 4
retaining washers and feet for possible future use.
➂ Set the KONSTANTER without feet onto the top of the other
KONSTANTER. The screws from the bottom KONSTANTER
must protrude through the oblong slots in the base of the
other KONSTANTER. Carefully push the top KONSTANTER
back until the screws snap into place.
➃ Screw the two KONSTANTERs together via the through-
holes and threads in the plug protector at the back. The top
KONSTANTER is thus secured against shifting.
➄ If you would like to electrically connect the two
KONSTANTERs, use the “mains jumper cable” and “RS 232
bus cable” accessories.
2.1.4 Connection to the Mains
Observe WARNING I!
Attention!
!
Before switching the KONSTANTER on, is must be
assured that available mains power complies with the
supply power values specified at the mains connection
on the back of the device.
The KONSTANTER requires 230 V ~ supply power. Connect the
mains inlet plug at the rear panel to a mains outlet with earthing
contact using the included power cable.
Rated power consumption is specified on the serial plate at the
bottom of the KONSTANTER.
A mains outlet is included above the mains inlet plug for looping
mains power through to an additional KONSTANTER.
This mains outlet can neither be switched on and off, nor is it protected
with a fuse.
Warning!
If mains power is looped through, make sure that overall
current consumption does not exceed 10 A at the
incoming supply lines!
Suitable “mains jumper cables” are available as
accessories (see order information on last page).
2.1.5 Connecting Power Consumers
The output leads are connected either at the front panel with
4 mm safety plugs to the “” and “” safety jacks, or at the rear
panel to the “” and “” outputs at the 6-pole screw terminal.
If loads are connected to both the front and the rear panel (not
allowed in the event of parallel connection due to danger of
overload!), constant voltage regulation applies to the terminals at
the rear panel. There are two terminals each for “” and “” for
load connection at the rear panel.
In the case of load current of greater than 10 A, these terminals must
be parallel connected due to the specified contact rating.
Make sure that the utilized cables have an adequate cross-section,
and that polarity is not reversed. It is advisable to twist the output
leads and to identify polarity at both ends.
The yellow-green safety jack at the front panel is connected to
PE, and can be used to connect ground cables or cable shield, or
can be used as an earth connection point for one of the output
poles.
2.1.6 Connection to Computer Interfaces
If the KONSTANTER is used within computer controlled systems,
one of the two connections described below must be established
via the appropriate interface.
Comments
 The KONSTANTER cannot be remote controlled via both
interfaces simultaneously. The interface which first initiates
action after mains power has been switched on is activated,
and the other remains inactive.
 In order to assure that existing bus activity is not interfered
with, all affected KONSTANTERs should be switched off while
establishing the bus connection.
 Both interfaces are equipped with a common ground (GND),
and are electrically isolated from the output in accordance with
specified electrical safety regulations.
 Interface configuration is described in chapter 4.7.4.
RS 232C Interface
Most controllers include two serial ports, which are commonly
designated COM1 and COM2, and which are equipped with 25 or
9-pin subminiature plug connectors.
A suitable cable with a length of approximately 2 meters is
available as an accessory for connecting the KONSTANTER and
the controller. Cables with other lengths are commercially
available. Appropriate adapters are available as well, in the event
that your controller is equipped with a 25-pin plug connector.
If you would like to fabricate the connector cable yourself, you’ll
need a 3-conductor shielded cable in order to establish
connection as shown in Figure 2.1.6 a.