Pfeiffer Vacuum HILOBE 2704, Operating Instructions Manual

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6.1.2 Inputs
The digital inputs switch various electronic drive unit functions. Inputs are assigned with functions ex-
factory. You can configure them via the RS-485 interface and the Pfeiffer Vacuum parameter set.
DI remote priority/pin 2
V+: The "remote" connection has control priority over all other control sources.
open Remote priority "inactive"
DI1 (rotation speed setting mode)/pin 3
V+: Rotation speed setting mode "active"
open Rotation speed setting mode "inactive"
DI pumping station/pin 5
V+: Vacuum pump on.
Control of all components connected and malfunction acknowledgement.
open Vacuum pump off
DI stand-by / pin 6
V+: Stand-by activated
The stand-by rotation speed is fixed at 30 Hz.
GND/openStand-by off
6.1.3 Outputs
The digital outputs have a maximum load limit of 24 V/80 mA per output. All outputs listed are configura-
ble with the Pfeiffer Vacuum parameter set via the RS-485 interface (description relates to factory set-
tings).
DO1/Pin 8
V+: No errors
After applying the voltage supply, the digital output DO1 permanently outputs V+ meaning
which means "no error".
GND Error
"Active low" signifies "Error" (common error message).
DO2/Pin 9
V+: Vacuum pump on
"Active high" means ''Vacuum pump on'' and rotates at set rotation speed.
Example: use the signal for the message vacuum pump "Ready for operation".
GND: Vacuum pump off
6.1.4 RS-485
Pin 13 and pin 14
You can connect a Pfeiffer Vacuum display and control unit (DCU or HPU) or an external PC via pin 13
and pin 14 on the D-sub connection of the electronic drive unit.
6.2 Interface RS-485
DANGER
Danger to life from electric shock
When establishing the voltages that exceed the specified safety extra-low voltage (according to IEC
60449 and VDE 0100), the insulating measures will be destroyed. There is a danger to life from elec-
tric shock at the communication interfaces.
► Connect only suitable devices to the bus system.
Interfaces
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