Pfeiffer Vacuum TC 110 User manual

OPERATING INSTRUCTIONS
EN
Translation of the Original
TC 110
Electronic drive unit

Dear Customer,
Thank you for choosing a Pfeiffer Vacuum product. Your new turbopump is designed to
support you by its performance, its perfect operation and without interfering your individual
application. The name Pfeiffer Vacuum stands for high-quality vacuum technology, a
comprehensive and complete range of top-quality products and first-class service. With this
expertise, we have acquired a multitude of skills contributing to an efficient and secure
implementation of our product.
Knowing that our product must not interfere with your actual work, we are convinced that our
product offers you the solution that supports you in the effective and trouble-free execution of
your individual application.
Please read these operating instructions before putting your product into operation for the
first time. If you have any questions or suggestions, please feel free to contact info@pfeiffer-
vacuum.de.
Further operating instructions from Pfeiffer Vacuum can be found in the Download Center on
our website.
Disclaimer of liability
These operating instructions describe all models and variants of your product. Note that your
product may not be equipped with all features described in this document. Pfeiffer Vacuum
constantly adapts its products to the latest state of the art without prior notice. Please take
into account that online operating instructions can deviate from the printed operating
instructions supplied with your product.
Furthermore, Pfeiffer Vacuum assumes no responsibility or liability for damage resulting from
the use of the product that contradicts its proper use or is explicitly defined as foreseeable
misuse.
Copyright
This document is the intellectual property of Pfeiffer Vacuum and all contents of this
document are protected by copyright. They may not be copied, altered, reproduced or
published without the prior written permission of Pfeiffer Vacuum.
We reserve the right to make changes to the technical data and information in this document.
2/48

Table of contents
1 About this manual 7
1.1 Validity 7
1.2 Applicable documents 7
1.3 Target group 7
1.4 Conventions 7
1.4.1 Instructions in the text 7
1.4.2 Pictographs 7
1.4.3 Stickers on the product 8
1.4.4 Abbreviations 8
2 Safety 9
2.1 General safety instructions 9
2.2 Safety instructions 9
2.3 Safety precautions 10
2.4 Limits of use of the product 11
2.5 Proper use 11
2.6 Foreseeable improper use 11
2.7 Functional safety 11
3 Product description 13
3.1 Identifying the product 13
3.2 Product features 13
3.3 Function 13
3.4 Scope of delivery 13
3.5 Connections 13
4 Installation 14
4.1 Connection diagram 14
4.2 Connection "X3" 16
4.2.1 Voltage supply 17
4.2.2 Inputs 17
4.2.3 Outputs 18
4.2.4 RS-485 18
5 Interfaces 19
5.1 Interface RS-485 19
5.1.1 Connection options 19
5.1.2 Cross-linked via the RS-485 connection 20
5.2 Pfeiffer Vacuum protocol for RS-485 interface 20
5.2.1 Telegram frame 20
5.2.2 Telegram description 21
5.2.3 Telegram example 1 21
5.2.4 Telegram example 2 21
5.2.5 Data types used 22
6 Parameter set 23
6.1 General 23
6.2 Control commands 23
6.3 Status requests 26
6.4 Set value settings 27
6.5 Additional parameter for the DCU 28
7 Operation 30
7.1 Configuring the connections with the Pfeiffer Vacuum parameter set 30
7.1.1 Configure digital inputs 30
7.1.2 Configure the digital outputs 30
7.1.3 Configure analog output 31
Table of contents
3/48

7.1.4 Configuring the accessory connections 31
7.1.5 Select interfaces 32
7.2 Operating modes 32
7.2.1 Gas type-dependent operation 32
7.2.2 Set value power consumption 33
7.2.3 Run-up time 33
7.2.4 Rotation speed switch points 34
7.2.5 Rotation speed setting mode 35
7.2.6 Standby 35
7.2.7 Confirming the rotation speed set value 36
7.2.8 Backing pump operating modes 36
7.2.9 Backing pump standby mode 37
7.2.10Operation with accessories 37
7.2.11Venting modes 38
7.3 Switching on the turbopump 38
7.4 Switching off the turbopump 39
7.5 Operation monitoring 39
7.5.1 Operating mode display via LED 39
7.5.2 Temperature monitoring 39
8 Malfunctions 41
8.1 General 41
8.2 Error codes 41
8.3 Warning and error messages when operating with DCU 43
9 Service solutions from Pfeiffer Vacuum 45
Declaration of conformity 47
Table of contents
4/48

List of tables
Tbl. 1: Stickers on the product 8
Tbl. 2: Abbreviations used in this document 8
Tbl. 3: Permissible ambient conditions 11
Tbl. 4: Data for use in safety-related applications in accordance with IEC 61508
and IEC 62061
11
Tbl. 5: Data for use in safety-related applications in accordance with
EN ISO 13849-1
12
Tbl. 6: Features of the device variants 13
Tbl. 7: Connection description of the electronic drive unit 13
Tbl. 8: Terminal layout of the 15-pin connection "X3" 17
Tbl. 9: Features of the RS-485 interface 19
Tbl. 10: Explanation and meaning of the parameters 23
Tbl. 11: Control commands 26
Tbl. 12: Status requests 27
Tbl. 13: Set value settings 28
Tbl. 14: Parameter for DCU functions 29
Tbl. 15: Configure parameters [P:062] and [P:063] 30
Tbl. 16: Configure parameters [P:019] and [P:024] 31
Tbl. 17: Configure parameter [P:055] 31
Tbl. 18: Configuring the accessory connections 32
Tbl. 19: Parameter [P:060] 32
Tbl. 20: Characteristic nominal rotation speeds of the turbopumps 36
Tbl. 21: Backing pump operating modes 36
Tbl. 22: Behavior and meaning of the LEDs on the electronic drive unit 39
Tbl. 23: Error messages of the electronic drive unit 42
Tbl. 24: Warning messages of the electronic drive unit 43
Tbl. 25: Warning and error messages when using a DCU 44
List of tables
5/48

List of figures
Fig. 1: TC 110 connection panel 13
Fig. 2: Connection diagram for TC 110 with connection cable 15
Fig. 3: Connection diagram for TC 110 with connection cable and accessories 15
Fig. 4: Connection diagram for TC 110 with external wiring 16
Fig. 5: Connection of the electronic drive unit via “X3” 19
Fig. 6: Cross-link via connection “X3” using connection cables 20
Fig. 7: Schematic diagram of power characteristics, example of heavy gases
[P:027] = 0
33
Fig. 8: Rotation speed switch point 1 active 34
Fig. 9: Rotation speed switch points 1 & 2 active, [P:701] > [P:719] 34
Fig. 10: Rotation speed switch points 1 & 2 active, [P:701] < [P:719] 35
List of figures
6/48

1 About this manual
IMPORTANT
Read carefully before use.
Keep the manual for future consultation.
1.1 Validity
These operating instructions are for customers of Pfeiffer Vacuum. They describe the function of the
designated product and provide the most important information for safe usage of the product. The de-
scriptions comply with applicable directives. All information provided in these operating instructions refer
to the current development status of the product. The documentation remains valid as long as the cus-
tomer does not modify the product in any way.
1.2 Applicable documents
TC 110 Operating instructions
Declaration of conformity A component of these instructions
1.3 Target group
This operating instructions are aimed at all persons performing the following activities on the product:
●transport,
●setup (installation),
●usage and operation,
●decommissioning,
●maintenance and cleaning,
●storage or disposal.
The work described in this document is only permitted to be performed by persons with the appropriate
technical qualifications (expert personnel) or who have received the relevant training from Pfeiffer Vac-
uum.
1.4 Conventions
1.4.1 Instructions in the text
Usage instructions in the document follow a general structure that is complete in itself. The required ac-
tion is indicated by an individual step or multi-part action steps.
Individual action step
A horizontal, solid triangle indicates the only step in an action.
►This is an individual action step.
Sequence of multi-part action steps
The numerical list indicates an action with multiple necessary steps.
1. Step 1
2. Step 2
3. ...
1.4.2 Pictographs
Pictographs used in the document indicate useful information.
About this manual
7/48

Note
Tip
1.4.3 Stickers on the product
This section describes all the stickers on the product along with their meaning.
Mod:
Mod.-Nr.:
Input:
Output:
Made in Germany 2019/01
TC 110
PM C01 790
24V DC 6,3A
0-24V 10A
0-1500Hz
Ser.-Nr.:12345678
Rating plate
The rating plate is located on the side of the electronic drive
unit.
warranty seal
Closure seal
The product is sealed ex factory. Damaging or removing a clo-
sure seal results in loss of the warranty.
Tbl. 1: Stickers on the product
1.4.4 Abbreviations
Abbreviation Meaning in this document
AI/AO Analog input/analog output
AIC Ampere Interrupting Capacity
DC Direct current
DCU Display Control Unit from Pfeiffer Vacuum
DI/DO Digital input/digital output
fRotation speed value of a vacuum pump (frequency, in rpm or Hz)
HPU Handheld Programming Unit
IElectric current
LED Light emitting diode
[P:xxx] Electronic drive unit control parameters. Printed in bold as three-digit number in
square brackets. Frequently displayed in conjunction with a short description
Example: [P:312] software version
PElectrical power
PE Protective earth
RElectrical resistance
RS-485 Standard for a physical interface for asynchronous serial data transmission (Recom-
mended Standard)
tTime
TC Electronic drive unit (Turbo Controller)
TMS Temperature Management System
UElectric voltage
X3 15-pole D-Sub connecting socket on the electronic drive unit
Tbl. 2: Abbreviations used in this document
About this manual
8/48

2 Safety
2.1 General safety instructions
This document includes the following four risk levels and one information level.
DANGER
Imminent danger
Indicates a hazardous situation which, if not avoided, will result in death or serious injury.
►Instructions on avoiding the hazardous situation
WARNING
Possibly imminent danger
Indicates a hazardous situation which, if not avoided, could result in death or serious injury.
►Instructions on avoiding the hazardous situation
CAUTION
Possibly imminent danger
Indicates a hazardous situation which, if not avoided, could result in minor or moderate injury.
►Instructions on avoiding the hazardous situation
NOTICE
Danger of property damage
Notice is used to address practices not related to physical injury.
►Instructions on avoiding property damage
Notes, tips or examples indicate important information on the product or on this document.
2.2 Safety instructions
All safety instructions in this document are based on the results of the risk assessment carried out in
accordance with Low Voltage Directive 2014/35/EU. Where applicable, all life cycle phases of the prod-
uct were taken into account.
Risks during installation
DANGER
Danger to life from electric shock
Power supply packs that are not specified or are not approved will lead to severest injuries up to
death.
►Make sure that the power supply pack meets the requirements for double isolation between
mains input voltage and output voltage, in accordance with IEC 61010 and IEC 60950.
►Make sure that the power supply pack meets the requirements in accordance with IEC 61010
and IEC 60950.
►Where possible, use original power supply packs or only power supply packs that correspond
with the applicable safety regulations.
Safety
9/48

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.
WARNING
Risk of injury due to incorrect installation
Dangerous situations may arise from unsafe or incorrect installation.
►Do not carry out your own conversions or modifications on the unit.
►Ensure the integration into an Emergency Off safety circuit.
Risks in the event of malfunctions
WARNING
Risk of injury from parts moving after a power failure or troubleshooting
The "pumping station" function of the electronic drive unit will remain active after a power failure or if
errors occur that shut down the vacuum pump or the system. When power is restored or after ac-
knowledging a fault, the vacuum pump runs up automatically. There is a risk of injury to fingers and
hands if they enter the operating range of rotating parts.
►Always keep the mains connection freely accessible so you can disconnect it at any time.
►Remove present mating plugs or bridges from the electronic drive unit possibly before the mains
power returns, as these can cause an automatic run-up.
►Switch the pump off using the "Pumping station" function (parameter [P:010]).
2.3 Safety precautions
Duty to provide information on potential dangers
The product holder or user is obliged to make all operating personnel aware of dangers
posed by this product.
Every person who is involved in the installation, operation or maintenance of the product
must read, understand, and adhere to the safety-related parts of this document.
Infringement of conformity due to modifications to the product
The Declaration of Conformity from the manufacturer is no longer valid if the operator
changes the original product or installs additional equipment.
●Following installation into a system, the operator is required to check and re-evaluate
as necessary the conformity of the overall system in the context of the relevant Europe-
an Directives before commissioning that system.
General safety precautions when handling the product
►Use only power supply packs that comply with the applicable safety regulations.
►Observe all applicable safety and accident prevention regulations.
►Check that all safety measures are observed at regular intervals.
►Recommendation: Establish a secure connection to the earthed conductor (PE); protection class
III.
►Never disconnect plug connections during operation.
►Keep lines and cables away from hot surfaces (> 70 °C).
►Do not carry out your own conversions or modifications on the unit.
►Observe the unit protection class prior to installation or operation in other environments.
►Observe the protection class by ensuring the correct seating of the present sealing plugs.
►Disconnect the electronic drive unit only once everything has come to a complete standstill and
when the mains power supply of the turbopump is interrupted.
Safety
10/48

2.4 Limits of use of the product
Installation location weatherproof (internal space)
Air pressure 750 hPa to 1060 hPa
Installation altitude max. 5000 m
Rel. air humidity max. 80 %, at T ≤ 31 °C,
up to max. 50 % at T ≤40 °C
Protection class III
Excess voltage category II
Permissible protection degree IP30
Degree of contamination 2
Ambient temperature +5 °C to +40 °C
Tbl. 3: Permissible ambient conditions
Notes on ambient conditions
The specified permissible ambient temperatures apply to operation of the turbopump at
maximum permissible backing pressure or at maximum gas throughput, depending on the
cooling type. The turbopump is intrinsically safe thanks to redundant temperature monitor-
ing.
●The reduction in backing pressure or gas throughput permits operation of the turbo-
pump at higher ambient temperatures.
●If the maximum permissible operating temperature of the turbopump is exceeded, the
electronic drive unit first reduces the drive output and then switches it off where neces-
sary.
2.5 Proper use
●The electronic drive unit is used exclusively for the operation of Pfeiffer Vacuum turbopumps and
their accessories.
2.6 Foreseeable improper use
Improper use of the product invalidates all warranty and liability claims. Any use that is counter to the
purpose of the product, whether intentional or unintentional, is regarded as misuse, in particular:
●Connection to power supplies that do not comply with the provisions of IEC 61010 or IEC 60950
●Operation with excessively high irradiated heat output
●Use in areas with ionizing radiation
●Operation in explosion-hazard areas
●Use of accessories or spare parts that are not listed in these instructions
2.7 Functional safety
The TC 110 drive unit (electronic drive unit) executes the “Safe Limited Speed” safety function in ac-
cordance with EN 61800-5-2. In the event of an excess rotation speed, the pump motor’s commutation
switches off and brings the drive into a safe state.
Summary of characteristic data for use in safety-related applications:
Characteristics in accordance with IEC 61508 and IEC 62061
Characteristic Safety Integrity Level PFH PFDav Proof Test Interval T
Value SIL CL 2 4.2 * 10-9 / h 3.7 * 10-4 20 a
Tbl. 4: Data for use in safety-related applications in accordance with IEC 61508 and
IEC 62061
Safety
11/48

Characteristics in accordance with EN ISO 13849-1
Characteristic Performance Level Category MTTFdAverage Diagnostic Coverage DC
Value PL d Cat. 3 high (134 a) medium (90 % - <99 %)
Tbl. 5: Data for use in safety-related applications in accordance with EN ISO 13849-1
●No proof test is required throughout the expected device lifetime of up to 20 years.
●If you calculate your safety application with the specified values for 20 years, you will need to de-
commission the safety controller and return it to the manufacturer after 20 years. You cannot ac-
complish a proof test.
Safety
12/48

3 Product description
3.1 Identifying the product
►To ensure clear identification of the product when communicating with Pfeiffer Vacuum, always
keep all of the information on the rating plate to hand.
►Learn about certifications through test seals on the product or at www.tuvdotcom.com with com-
pany ID no. 000021320.
3.2 Product features
The type TC 110 electronic drive unit is a permanent component of the turbopump. The purpose of the
electronic drive unit is to drive, monitor and control the entire turbopump.
Feature TM 110
Connection voltage TC 24 V DC
Connection panel Standard (X3)
Turbopump HiPace 10, 30, 60, 80, 300, Splitflow 50, 80
Tbl. 6: Features of the device variants
3.3 Function
1 2 3
Fig. 1: TC 110 connection panel
1 “PV.can” service connection 3 LED operating mode display
2 Connection "X3"
3.4 Scope of delivery
●TC 110 as an integrated part of the turbopump
●Operating instructions
3.5 Connections
PV.can
M12 socket with screw lock and LED for the connection of an integrated pressure
measurement and for Pfeiffer Vacuum service purposes.
X3
15-pin D-sub socket for connection and configuration of a remote control.
Device socket on the rear side of the electronic drive unit for the connection of the
turbopump.
Tbl. 7: Connection description of the electronic drive unit
Product description
13/48

4 Installation
4.1 Connection diagram
DANGER
Danger to life from electric shock
Power supply packs that are not specified or are not approved will lead to severest injuries up to
death.
►Make sure that the power supply pack meets the requirements for double isolation between
mains input voltage and output voltage, in accordance with IEC 61010 and IEC 60950.
►Make sure that the power supply pack meets the requirements in accordance with IEC 61010
and IEC 60950.
►Where possible, use original power supply packs or only power supply packs that correspond
with the applicable safety regulations.
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.
WARNING
Risk of injury due to incorrect installation
Dangerous situations may arise from unsafe or incorrect installation.
►Do not carry out your own conversions or modifications on the unit.
►Ensure the integration into an Emergency Off safety circuit.
Contact loads at X3
1. Note the maximum contact load of 6 mA per digital input
2. Note the maximum contact load of 50 mA per digital output.
3. Note the maximum contact load of 200 mA at the accessory outputs.
4. Do not exceed the total sum of the load of all connections of 200 mA.
Installation
14/48

A
B
C
34
21
+U
B
PE
A
B
C
DC in
1
2
3
4
5
24 VDC*
RS 485 +
RS 485 -
n. c . RS485
2
3
4
5
6
7
10
11
8
9
12
13
14
15
1
1
8
9
15
X3
DI
DI1
DI2
DI
DI
24 VDC* (V+)
Acc. A1
Acc. B1
DO1
DO2
AO1
RS 485 D+
RS 485 D-
+U
B
FE
2
3
4
5
6
7
10
11
8
9
12
13
14
15
1
S2
S1
Fig. 2: Connection diagram for TC 110 with connection cable
A
B
C
34
21
+U
B
PE
A
B
C
DC in
1
2
3
4
5
24 VDC*
RS 485 +
RS 485 -
n. c . RS485
2
3
4
5
6
7
10
11
8
9
12
13
14
15
1
1
8
9
15
X3
DI
DI1
DI2
DI
DI
24 VDC* (V+)
Acc. A1
Acc. B1
DO1
DO2
AO1
RS 485 D+
RS 485 D-
+U
B
FE
2
3
4
5
6
7
10
11
8
9
12
13
14
15
1
S2
S1
1
3
4
1
3
4Acc . A1
Acc . B1
4
3 1
4
3 1
Fig. 3: Connection diagram for TC 110 with connection cable and accessories
Installation
15/48

2
3
4
5
6
7
1 0
11
8
9
1 2
1 3
1 4
1 5
1
1
8
9
15
X3
DI
DI1
DI2
DI
DI
24 V DC* (V+)
Acc. A1
Acc. B1
DO1
DO2
AO1
RS 485 D+
RS 485 D-
+U
B
FE
Acc
Acc
2
3
4
5
6
7
1 0
11
8
9
1 2
1 3
1 4
1 5
1
0 – 10 V DC =
0 –100 % *f
end
R ≥ 10 kW
100 – 240 (± 10 %) V AC
+U
B
PE
B
A
C
DCout AC in
24 VDC / max. 200 mA
24 VDC / max. 200 mA
24 VDC / max. 50mA
24 VDC / max. 50mA
+24 V DC / 4,6 - 6,3 A ± 10 %
FE
ma x . 6 m A
ma x . 6 m A
ma x . 6 m A
ma x . 6 m A
ma x . 6 m A
Fig. 4: Connection diagram for TC 110 with external wiring
4.2 Connection "X3"
NOTICE
Property damage on the electronics
Separating the "X3" plug-and-socket connection with voltage supply switched on may lead to the de-
struction of electronic components.
►Always interrupt the voltage supply before disconnecting the “X3” connecting plug.
►Switch off the power supply pack.
►After switching off the power supply pack, wait until the residual load has dispersed completely
before disconnecting the plug-and-socket connection.
The 15-pin sub-D connection with the "X3" designation offers the possibility to operate the electronic
drive unit remotely. The following specifications are the factory settings for the electronic drive unit. You
can configure the settings with the Pfeiffer Vacuum parameter set.
►Use screened plugs and cables.
Installation
16/48

Pin Assignment Factory setting description
1 +24 V DC input Voltage supply for the electronic drive unit
2 DI Remote priority Operation via “X3” interface (open: off; V+: set and takes prior-
ity over other digital inputs)
3 DI1 Enable venting (open: off, V+: on)
4 DI2 Heater (open: off, V+: on)
5 DI Pumping station open: off; V+: on and malfunction acknowledgment
6 DI Standby
DI malfunction acknowl-
edgement
Standby rotation speed (open: off, V+: on)
Malfunction acknowledgement V+ pulse (500 - 2000 ms)
7 +24 V DC* output (V+) Reference voltage for all digital inputs
8 DO1 GND: no, V+: yes (Imax = 50 mA/24 V)
9 DO2 GND: no, V+: yes (Imax = 50 mA/24 V)
10 Accessory output A1 open: off; V+: on
11 Accessory output B1 open: off; V+: on
12 AO1 Actual speed; 0 to 10 V DC corresponds to 0 to 100%: RL >
10 kΩ
13 RS-485 D+
14 RS-485 D-
15 Ground (GND) Ground connection of the voltage supply; reference ground for
all digital inputs and outputs
Tbl. 8: Terminal layout of the 15-pin connection "X3"
4.2.1 Voltage supply
+24 V DC input/pin 1
The electrical connection to “X3” is made using connection cable from the Pfeiffer Vacuum accessory
program or, by the customer, at pin 1 and pin 15.
+24 V DC* output/pin 7
A connection with +24 V DC to pin 7 (active high) activates inputs 2 to 6. Alternatively, they can be acti-
vated via an external PLC. "PLC High level" activates and "PLC Low level" deactivates the functions.
●PLC High level: +13 V to +33 V
●PLC High level: -33 V to +7 V
●Ri: 7 kΩ
●lmax < 200 mA (with RS-485, where present)
4.2.2 Inputs
The digital inputs at the “X3” connection are used to switch various electronic drive unit functions. Inputs
DI1 to DI2 are assigned functions in the factory. You can configure them via the RS-485 interface and
the Pfeiffer Vacuum parameter set.
DI remote priority/pin 2
V+: Connection “X3” has an operating supremacy before all other digital inputs.
open: Remote priority inactive
DI1 (release venting)/pin 3
V+: Enable venting (venting as per venting mode)
open: Venting blocked (no venting occurs)
Installation
17/48

DI2 (heater)/pin 4
V+: Heater on
open: Heater off
DI pumping station/pin 5
Activation of the turbopump and control of connected pumping station components (e.g. backing pump,
venting valve, air cooling). Any pending error messages are reset by eliminating the cause.
V+: Error acknowledgement and pumping station on
open: Pumping station off
DI standby malfunction acknowledgment/pin 6
In standby mode, the turbopump operates at a specified rotor speed < nominal rotation speed. The fac-
tory setting and recommended operation is 66.7 % of the nominal rotation speed.
V+: Standby activated
V+: Reset pending error messages when cause has been eliminated with a pulse of 500 to
2000 ms duration
open: Standby off, operation at nominal rotation speed
4.2.3 Outputs
The digital outputs at the “X3” connection have a maximum load limit of 24 V/50 mA per output. All out-
puts listed below are configurable with the Pfeiffer Vacuum parameter set via the RS-485 interface (de-
scription relates to factory settings).
DO1 (rotation speed switch point reached)/pin 8
Active high: After reaching the rotation speed switch point. Rotation speed switch point 1 has a factory
setting of 80% of the nominal rotation speed. This can be used, for example, for a “Turbopump ready for
operation” message.
DO2 (no error)/pin 9
When the supply voltage has been connected, digital output DO2 permanently outputs 24 V DC, which
means “no error”. Active low: in case of error (group error message).
Accessory outputs/pin 10 and pin 11
The accessory outputs have a maximum load limit of 24 V/200 mA. You can assign additional functions
to the accessory inputs and outputs via DCU, HPU, or the PC.
Factory setting
●Accessory output A1: Control of connected air cooling.
●Accessory output B1: Control of a connected venting valve in accordance with venting release via
input DI1.
AO1 analog output 0 to 10 V DC/pin 12
A speed-proportional voltage (0 to 10 V DC, equals 0 to 100% × fNominal) can be picked off at the analog
output (load R ≥ 10 kΩ). Additional functions (optionally current/power) can be assigned to the analog
output via DCU, HPU or PC.
4.2.4 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.
Installation
18/48

5 Interfaces
5.1 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.
The interface with the designation “RS-485” is intended for the connection of a Pfeiffer Vacuum display
and control unit (DCU or HPU) or an external computer. The connections are galvanically safe and are
isolated from the maximum supply voltage for the electronic drive unit. The electrical connections are
optically decoupled internally.
Designation Value
Serial interface RS-485
Baudrate 9600 Baud
Data word length 8 bit
Parity none (no parity)
Start bits 1
Stop bits 1
Tbl. 9: Features of the RS-485 interface
5.1.1 Connection options
TC1 2 3 4
5
6
7
Fig. 5: Connection of the electronic drive unit via “X3”
1 DCU with power supply pack 5 DCin connection
2 M12 to M12 extension cable, 6 DCU 002 (optional HPU 001)
3 RS-485 interface connection 7 TPS power supply pack
4 Connection Cable
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Connect display and control units
►Use the connection cable from the control unit shipment or from the accessories program.
►You can connect one external control unit to the RS-485 interface.
►You can connect a USB interface (PC) via the USB/RS-485 converter.
5.1.2 Cross-linked via the RS-485 connection
TC TC
D+
D-
USB/RS485-converter
RS 485
USB
PC
TC PC1 2 3 4
Fig. 6: Cross-link via connection “X3” using connection cables
1 Connection cable with RS-485 3 M12 to M12 extension cable,
2 Y-connector for RS-485 4 USB RS-485 converter
Networking as RS-485 Bus
The group address of the electronic drive unit is 961.
1. Install the devices according to the specification for RS-485 interfaces.
2. Make sure that all devices connected to the bus have different RS-485 device addresses [P:797].
3. Connect all devices to the bus with RS-485 D+ and RS-485 D-.
5.2 Pfeiffer Vacuum protocol for RS-485 interface
5.2.1 Telegram frame
The telegram frame of the Pfeiffer Vacuum protocol contains only ASCII code characters [32; 127], the
exception being the end character of the telegram C.R. Basically, a master (e.g. a PC) sends a
telegram, which is answered by a slave (e.g. electronic drive unit or transmitter).
a2 a1 a0 * 0 n2 n1 n0 l1 l0 dn ... d0 c2 c1 c0 CR
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