iseg EHQ 9005-F Operator's Manual

Spezialelektronik GmbH

iseg c/o ROTECH Email: [e-mail] Phone ++ 49 351 / 26 95 - 260
Spezialelektronik Bautzner Landstr. 45 http://www.iseg-hvcom Fax ++ 49 351 / 26 95 - 261

GmbH D - 01454 Rossendorf Germany

9-channel High Voltage Power Supply EHQ 9005-F

Operators Manual

Contents

1. General information

2. Technical data

3. Handling

4. Communication via interface

4.1 Device Protocol DCP

4.2 Overview about used CAN data frames

4.3 Detailed CAN data frames description

4.4 CAN-Bus implementation

Appendix A: Side view

Attention!

-The device must not be operated with the cover removed.

-We decline all responsibility for damages and injuries caused by an improper use of the
module. It is highly recommended to read the manual before any kind of operation.

Note

The information in this manual is subject to change without notice. We take no responsibility for any error in the
document. We reserve the right to make changes in the product design without reservation and without
notification to the users.

Filename EHQ9005F_V113.___; version 1.13 as of 2001-01-11

Spezialelektronik GmbH

iseg c/o ROTECH Email: [e-mail] Phone ++ 49 351 / 26 95 - 260
Spezialelektronik Bautzner Landstr. 45 http://www.iseg-hv.com Fax ++ 49 351 / 26 95 - 261

2 GmbH D - 01454 Rossendorf Germany

Spezialelektronik GmbH

iseg c/o ROTECH Email: [e-mail] Phone ++ 49 351 / 26 95 - 260
Spezialelektronik Bautzner Landstr. 45 http://www.iseg-hv.com Fax ++ 49 351 / 26 95 - 261

GmbH D - 01454 Rossendorf Germany 3

1. General information

The EHQ 9005-F is a 9-channel high voltage power supply in 6U Eurocard format. Each single
channel is independently controllable. The outputs (V-) und (V+) of each channel are both floating
against each other and against ground.
The EHQ 9005-F is made ready for mounting into a crate. It is also possible to supply the modules
separately with the necessary power. The unit is software controlled via CAN Interface directly
through a PC or similar controller. With the CAN Controller MHCC 64 it is possible to create a multi­channel high voltage system of any configurable size. The HV output at the EHQ 9005-F is available
with a REDEL-Connector or similar.

2. Technical data

EHQ 9005 - F

Output current I

O

max. 15 mA (at 300 V)

Output voltage V

O

0 to 500 V

Floating

Connector (V-) to GND: ≤ 15 V
Connector (V+) to GND: ≤ 15 V + VO

Ripple and noise f = 10 Hz to 100 kHz: < 10 mV

f > 100 kHz: < 2 mV

(at max. load and
VO > 50 V)

Hardware current limit I

max

Potentiometer internal
Interface CAN-Interface
Voltage setting Via software, resolution 1 mV
Voltage measurement Via software, resolution 1 mV
Current measurement Via software, resolution 100 nA
Accuracy of voltage

measurement

± 20 mV

Accuracy of current
measurement

± (0,01% ∗ IO + 0,05% ∗ I

O max

+ 1 digit)

Temperature coefficient

< 5 ∗ 10-5/

K

Stability

< 20 mV (no load/load and ∆ VIN)

Rate of change of
output voltage

Via software:

0,2 V/s to 50 V/s resolution 0,1 V
Channel control

via software

Status 9 bit: channel error, KILL- enable, channel

emergency cut-off, ramp, channel on/off, input error,

current trip, sense error
8 (1) channels error control

via software

Current limit

(″Channels 0-8 OK″ is signalled if
no limits have been exceeded.)

Error signal

Green LED at ″Channels 0-8 OK″
Protection loop (Is);

SL-contacts on the REDEL

5 mA < Is < 20 mA ⇒ module on

Is < 0,5 mA ⇒ module off

Power requirements V

IN

+ 24 V (< 4 A) and + 5 V (< 0,5 A)
Packing 9-channels in 6U Euro cassette

(40,64 mm wide and 220 mm deep)
Connector 96-pin connector according to DIN 41612
HV connector 40-pin REDEL-Connector

EHQ 9005-F

9 x 500 V / 15 mA

V

0

1
2
3
4

S
V

V

V

V

S

S

S

S

S

V

S

V

S

V

S

V

S

V V

S
V

V
S
V
S

S

S

S

V

V

V

S

V

8

7

6

5

CAL

SL

SL

CC

CHANNEL

0-8 OK

HV-OUT

CH +

-

+

-

S

CH

V

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3. Handling

The supply voltages and the CAN interface is connected to the module via a 96-pin connector on the
rear side of the module.

The 9-channel Module EHQ 9005-F is assembled of two sub-modules (8 channels / 1 channel),
each controlled independently via an own CAN identifier.

The maximum output current for each channel is defined through the position of an internal
potentiometer (I

max

0 to I

max

7 corresponding to channel 1 to 8 and I

max

0 to channel 9).
The output current will be limited to this setting value after it exceeds the threshold and the green
LED on the front panel is ‘OFF‘.

A safety loop will be installed with the help of the upper and lower SL contacts (on the middle
contact bank) from the REDEL-Connector. If the safety loop is active then output voltage is present
only if a current is flowing in a range of 5 to 20 mA of any polarity ( i.e. safety loop is closed). If the
safety loop is opened during operation then the output voltages are shut off without ramp and the
corresponding bit in the ‘Status module’ will be cancelled. After the loop will be closed again the
channels must be switched ‘ON’ and a new set voltage must be given before it is able to offer an
output voltage. The pins of the loop are potential free, the internal voltage drop is ca. 3 V. Coming
from the factory the safety loop is not active (the corresponding bit is always set). Removing of an
internal jumper makes the loop active (s. App. A).

The connector (V-) of each channels should be connected to ground at a certain chosen point.
Otherwise it must be sure, that the potential between (V-) and GND should not exceed the amount
of 15 V.

The sense line (S-) and (S+) has to be connected to the load without any exception. Otherwise the
output voltage VO is ca. 20 V above of the given V

set.

Pin assignment 96-pin connector according to DIN 41612:

PIN PIN PIN Data

a1 b1 c1 +5V
a3 b3 c3 +24V
a5 b5 c5 GND

a11

@CAN_GND 

b11

@CANL  potential free

c11

@CANH 

a13 RESET

b13 OFF with ramp (e.g. 10s after power fail)

a30

A4

b30

A5

c30

GND



a31

A2

b31

A3

c31

GND

 Address field

a32

A0

b32

A1

c32

GND

 module address ( A0 ... A5)

The hardware signal “OFF with ramp” (Pulse High-Low-High, pulse width ≤ 100 µs) on pin b13 will be
shut off the output voltage for all channels with a ramp analogue to the Group access “Channel
ON/OFF”. The ramp speed is defined to V

OUTmax

/ 50 s. This is the actually module ramp speed after
“OFF with ramp”.
With help of the Group access “Channel ON/OFF” all channels are switched “ON” again.

With the address field a30/b30 ..... a32/b32 the module address will be coded.

(see item 4.4, description 11bit-Identifier).
Connected to GND ⇒ A(n) = 0 ; contact open ⇒ A(n) = 1

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4. Communication via interface

4.1 Device Control Protocol DCP

The communication between the controller and the module works according to the Device Control
Protocol DCP, which has been designed for the use of multi-level-hierarchy systems for instruments.

This protocol is working according to the master slave principle. Therefore, the controllers which are
on higher hierarchy are working as masters always while devices, which are on lower hierarchy are
working as slaves.

In the event of the control of the HV device through a controller the controller will have the master
function in this system, while the module (as a Front-end device with intelligence) will be the slave.

The data exchange between the controller and the Front-end (FE) device works with help of data
frames. These data frames are assembled of one direction bit DATA_DIR, one identifier bit
DATA_ID and further data bytes. The direction bit DATA_DIR defines whether the data frame is a
write or read-write access. The DATA_ID carries the information of the type of the data frame and
occasionally sub addresses (G0, G1). It is characterised through the first byte of the data frame with
bit 7=1. The function of the module as part of a complex system will be defined through the
DATA_ID .

In such systems with many hierarchical levels a single function of a single module can be addressed
by using group controllers (GC). Then, for each GC on the way to the module the data frame is
created through nesting of the address fields of the GC-addresses followed by the DATA_ID (not
necessary in case of control a single module).

EXT_

INSTR

DATA

_DIR

DATA_ID

Bit

Access

7 6 5 4 3 2 1 0

x

0

x x x x x x x

No DATA_ID

0/1

0

1 0 x x x x x x

Write access on Front-end device

0/1

1

1 0 x x x x x x

Read-write access on Front-end device
(Request at Write)

0/1

0

1 1 x x x x

G1 G0 Write access on group

0/1

1

1 1 x x x x

G1 G0 Read-write access on group (Request at Write)

G0, G1 sub address
Only needed if group controller (GC) is used

These data frames correspond to a transfer into layer 3 (Network Layer) respectively layer 4
(Transport Layer) of the OSI model of ISO. The transmission medium is CAN Bus according to
specification 2.0A, related to level1 (Physical Layer) and level 2 (Data Link Layer).

The Device Control Protocol DCP has been matched to the CAN Bus according to specification CAN

2.0A, but it is also possible to be matched to further transmission media (e.g. RS232). Therefore
specials of layer 1 and 2 are only mentioned if absolutely necessary and if misunderstandings of
functions between the Transport Layer and functions of the Data Link Layer may be possible. The
communication between the controller and a module on the same bus segment will be described as
follows.

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4.2 Summary of CAN data frames

The 9-channel Module EHQ 9005-F is assembled of two sub-modules (8 channels / 1 channel),
each controlled independently via an own CAN identifier.

Following list describes the accesses of the DCP made for one of these sub-modules.

EXT_

INSTR

DATA_

DIR

DATA_ID

Bit

Access

read/
write/
active

DATA

-

Bytes

ID1 ID0 7 6 5 4 3 2 1 0

x

0

x x x x x x x

No DATA_ID

x x 1 0 C1 C0 N3 N2 N1 N0 Single access CHANNEL:

1 1/0 1 0 0 0 N3 N2 N1 N0 Current trip r/w 4
0 1 1 0 0 0 N3 N2 N1 N0 Actual voltage r 4
0 1 1 0 0 1 N3 N2 N1 N0 Actual current r 4
0 1/0 1 0 1 0 N3 N2 N1 N0 Set voltage r/w 4
0 1 1 0 1 1 N3 N2 N1 N0 Status channel r 3

1 1 C3 C2 C1 C0 G1 G0 Group access module

1 1 1 1 0 0 0 0 0 0 Voltage supplies and module temp. r 8
1 1 1 1 0 0 0 1 0 0 free r 8
1 1 1 1 0 0 1 0 0 0 Existing hardware channels r 3
1 1 1 1 0 0 1 1 0 0 Channel works according to control r 3
1 1 1 1 0 1 0 0 0 0

Status4 Sense voltage ≠ Set voltage

r 3

0 1/0 1 1 0 0 0 0 0 0 General status module r/wa2

0 1 1 1 0 0 0 1 0 0 Status1 Voltage limit has been

exceeded at single channel

r 3

0 1 1 1 0 0 1 0 0 0 Status2 Hardw. current limit has been

exceeded at single channel

r 3

0 1/0 1 1 0 0 1 1 0 0 Channel ON / OFF r/w 3
0 1/0 1 1 0 1 0 0 0 0 Ramp speed r/w 3
0 0 1 1 0 1 0 1 0 0 Emergency cut-off w 3
0 1 1 1 0 1 1 0 0 0 Log-on Front-end device in superior

layer

a 3

0 0 1 1 0 1 1 0 0 0 Log-off superior layer at Front-end

device

w 3

0 1/0 1 1 0 1 1 1 0 0 Bit rate r/w 3
0 1/0 1 1 1 0 0 0 0 0 Serial number, software release and

CAN message configuration

r/w 7/2

0 0 1 1 1 0 0 1 0 0 Set voltage for all channels w 4
0 1/0 1 1 1 0 1 1 0 0 KILL-enable r/w 3
0 1/0 1 1 1 1 0 0 0 0 ADC filter setting r/w 3
0 1 1 1 1 1 0 1 0 0 Module nominal values r 5
0 1 1 1 1 1 1 0 0 0 Status3 Software current trip has been

exceeded at single channel

r 3

Ci: Accesses Ni 0 to 15: Channel 0 to 15
Gi 0 to 3: Group 0 to 3 Only needed if group controller (GC) is used

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4.3 Detailed CAN data frames description

Log-on and Log-off Front-end (FE) device (active/write access)
Log-on frame 8-channel module (DLC = 3)

Byte DATA_ID DATA_1 DATA_0
Bit 7 6 5 4 3 2 1 0 7 5 4 3 2 1 0 7 1 0

Designation DATA

_DIR

G1 G0

Data 1 1 1 0 1 1 0 0 0 u v w x y z 1 0
Description active G1 to G0: Group 0 to 3

Only needed if group

controller (GC) is used

Values of bit z to u:
see Group access:

General status module

Type HIGH resolution

After POWER ON the module will give this group access cyclically on the bus (ca. 2...10 sec).
Bit 0 to 5 in DATA_1 describes the general status of the module (see Group access: General status

module). If a controller identifies this access then it is able to register this module as a Front-end device and is
able to address it with FE_ADR.

(Module address, see also item 4.4, description 11bit-Identifier)
Bit 0 to 1 in DATA_0 describes the type of installed resolution of current and voltage measurement and setting

(see according Single and Group accesses).

Remote-frame Log-on controller (DLC = 2)

Byte DATA_ID DATA_0
Bit 7 6 5 4 3 2 1 0 0

Designation DATA_DIR G1 G0
Data 0 1 1 0 1 1 0 0 0 1
Description write G1 to G0: Group 0 to 3

Only needed if group

controller (GC) is used

Module is
log-on

The module will not send further ‘Log-on controller” accesses after the successful registration as long as it
receives accesses from the external CAN Bus in periods shorter than one minute and until the controller will
send a ‘Log-off controller” access to the Front-end device, respectively.

Remote-frame Log-off controller (DLC = 2)

Byte DATA_ID DATA_0
Bit 7 6 5 4 3 2 1 0 0

Designation DATA_DIR G1 G0
Data 0 1 1 0 1 1 0 0 0 0
Description write G1 to G0: Group 0 to 3

Only needed if group

controller (GC) is used

Module is
log-off

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Single access CHANNEL: Current trip (Read-write/Write access), extended access list

Read-write

Byte Identifier DATA_ID Controller (DLC = 1):
Bit ID1 ID0 7 6 5 4 3 2 1 0 Read actual software current trip

Designation EXT_

INSTR

DATA
_DIR

N3 N2 N1 N0

at the corresponding channel

Data 1 1 1 0 0 0 x x x x
Description read Channel Nx off 0 ... 15

⇓ Response module (DLC = 4)

Byte Identifier DATA_ID DATA_2 DATA_1 DATA_0
Bit ID1 ID0 7 6 5 4 3 2 1 0 0

Designation EXT_

INSTR

DATA
_DIR

N3 N2 N1 N0 LSB

Data 1 0 1 0 0 0 x x x x x
Description write Channel Nx off 0 ... 15 Actual current trip with resolution

I

O max

/ 10∗exp6 [A]

in DATA_2 to DATA_0

Write (Controller [DLC = 4]: Write software current trip at corresponding channel)

Byte Identifier DATA_ID DATA_2 DATA_1 DATA_0
Bit ID1 ID0 7 6 5 4 3 2 1 0 ... 0

Designation EXT_

INSTR

DATA
_DIR

N3 N2 N1 N0 LSB

Data 1 0 1 0 0 0 x x x x x
Description write Channel Nx off 0 ... 15 New actual current trip with resolution

I

O max

/ 10∗exp6 [A]

in DATA_2 to DATA_0

If the channel is in ‘ON’ and the measured output current will exceed the programmed current trip, then the
voltage will be shut off without ramp (Bit o = 0 in ‘Status channel’).

At the same time bit t in ‘Status channel’ and bit z in ‘ General status module’ will be set. These bits will be
reset if ‘Status3 Software current trip’ will be read.

With help of the ‘Group access’ ‘Switch ON /OFF’ the concerning channels are switched ON again.
Function will be switched off with write ‘Current trip = 0’.

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Single access CHANNEL: Actual voltage (Read-write access)

Byte DATA_ID Controller (DLC = 1):
Bit 7 6 5 4 3 2 1 0 Read actual voltage at the corresponding channel

Designation DATA

_DIR

N3 N2 N1 N0

Data 1 1 0 0 0 x x x x
Description read Channel Nx of 0 ... 15

⇓ Response module (DLC = 4)

Byte DATA_ID DATA_2 DATA_1 DATA_0
Bit 7 6 5 4 3 2 1 0 0

Designation DATA

_DIR

N3 N2 N1 N0 LSB

Data 0 1 0 0 0 x x x x x
Description write Channel Nx of 0 ... 15

Actual voltage with resolution V

O max

/ 10∗exp6 [V]

in DATA_2 to DATA_0

Single access CHANNEL: Actual current (Read-write access)

Byte DATA_ID Controller (DLC = 1):
Bit 7 6 5 4 3 2 1 0 Read actual current at the corresponding channel

Designation DATA

_DIR

N3 N2 N1 N0

Data 1 1 0 0 1 x x x x
Description read Channel Nx of 0 ... 15

⇓ Response module (DLC = 4)

Byte DATA_ID DATA_2 DATA_1 DATA_0
Bit 7 6 5 4 3 2 1 0 0

Designation DATA

_DIR

N3 N2 N1 N0 LSB

Data 0 1 0 0 1 x x x x x
Description write Channel Nx of 0 ... 15

Actual current with resolution I

O max

/ 10∗exp6 [A]

in DATA_2 to DATA_0

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Single access CHANNEL: Set voltage (Read-write/Write access)

Read-write

Byte DATA_ID Controller (DLC = 1):
Bit 7 6 5 4 3 2 1 0 Read set voltage at the corresponding channel

Designation DATA

_DIR

N3 N2 N1 N0

Data 1 1 0 1 0 x x x x
Description read Channel Nx of 0 ... 15

⇓ Response module (DLC = 4)

Byte DATA_ID DATA_2 DATA_1 DATA_0
Bit 7 6 5 4 3 2 1 0 0

Designation DATA

_DIR

N3 N2 N1 N0 LSB

Data 0 1 0 1 0 x x x x x
Description write Channel Nx of 0 ... 15

Set voltage with resolution V

O max

/ 10∗exp6 [V]

in DATA_2 to DATA_0

Write (Controller [DLC = 4]: Write set voltage at corresponding channel)

Byte DATA_ID DATA_2 DATA_1 DATA_0
Bit 7 6 5 4 3 2 1 0 0

Designation DATA

_DIR

N3 N2 N1 N0 LSB

Data 0 1 0 1 0 x x x x x
Description write Channel Nx of 0 ... 15

Set voltage with resolution V

O max

/ 10∗exp6 [V]

in DATA_2 to DATA_0

If the channel is switched ‘ON’ then the voltage will be ramped to the set value after the receipt of this access.
Otherwise the set value will just be stored and only used for ramping to the set voltage after the channel will be
switched ‘ON’.

Set voltages higher than the maximum module voltage will be ignored and the bit ‘Input error’ of the ‘Status
channel’ will be set.

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Single access CHANNEL: Status channel (Read-write access)

Byte DATA_ID Controller (DLC = 1):
Bit 7 6 5 4 3 2 1 0 Read channel status at the corresponding channel

Designation DATA

_DIR

N3 N2 N1 N0

Data 1 1 0 1 1 x x x x
Description read Channel Nx of 0 ... 15

⇓ Response module (DLC = 3)

Byte DATA_ID DATA_1 DATA_0
Bit 7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0 7 ..2 1 0

Designation DATA

_DIR

N3 N2 N1 N0 v c k n r o i f s t

Data 0 1 0 1 1 x x x x x x x x x x x 0 x x
Description write Channel Nx of 0 ... 15 Input-error

i=0, no input­error

i=1, set voltage,
fN or ramp out off
set range

o=0 ⇒ Channel OFF
o=1 ⇒ Channel ON

Voltage state
r=0 ⇒ Voltage is stable
r=1 ⇒ Voltage ramps

Channel Emergency cut-off
n=0 ⇒ Channel works
n=1 ⇒ Cut-off (only to first

write in DAC)

KILL-enable

k=0 ⇒KILL function disable:

VO shut off if current limit has
been exceeded and then VO is
ramping from 0V to V

SET

k=1 ⇒KILL function enable:

VO shut off permanently if
current limit has been
exceeded

Current limit
c=0 ⇒ Channel is ok

c=1⇒ VO shut of 0 V because hardware

current limit has been exceeded

Voltage limit
v=0 ⇒ Channel is ok

v=1 ⇒ VO shut of permanently because

voltage limit has been exceeded

Sense

s=0 Sense o.k.; s=1 Sense fault

Current trip

t=1 ⇒ VO shut of 0 V

because software current trip has been exceeded

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Group access: Voltage supplies and module temperature (Read-write), extended access list

Read-write

Byte Identifier DATA_ID Controller (DLC = 1):
Bit ID1 ID0 7 6 5 4 3 2 1 0 Read voltage supplies and the

Designation EXT_

INSTR

DATA
_DIR

module temperature

Data 1 1 1 1 0 0 0 0 0 0
Description read

⇓ Response module (DLC = 8)

Byte Identifier DATA_ID DATA_n
Bit ID1 ID0 7 6 5 4 3 2 1 0 6 5 4 3 2 1 0

Designation EXT_

INSTR

DATA
_DIR

U1 U2 U3 U4 U5 t2 t1

Data 1 0 1 1 0 0 0 0 0 0 x x x 0 0 x x
Description write +24V +15V +5V 0 0 Temperature

U1 to U3: Voltage resolution 100 mV
U4; U5 not available on EHQ 8005-F

t2 & t1: Module temperature resolution 0,1 °C

Out of range (see Group access: General status module) will be generated if tolerance of voltage supplies is
more than ± 5%.

Group access : Existing hardware channels (Read-write/Write access), extended access list
Read-write

Byte Identifier DATA_ID Controller (DLC = 1):
Bit ID1 ID0 7 6 5 4 3 2 1 0 Read the existing hardware channels

Designation EXT_

INSTR

DATA
_DIR

at the corresponding module

Data 1 1 1 1 0 0 1 0 0 0
Description read

⇓ Response module (DLC = 3)

Byte Identifier DATA_ID DATA_1 DATA_0
Bit ID1 ID0 7 6 5 4 3 2 1 0 7 ... 0 7 ... 0

Designation EXT_

INSTR

DATA
_DIR

N3 N2 N1 N0 LSB

Data 1 0 1 1 0 0 1 0 0 0 x
Description write x=1: channel is existing

x=0: channel is not existing
LSB = channel 1

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Group access : Channel works according to control (Read-write/Write access),

extended access list

Read-write

Byte Identifier DATA_ID Controller (DLC = 1):
Bit ID1 ID0 7 6 5 4 3 2 1 0 Are channels working correctly according to

Designation EXT_

INSTR

DATA
_DIR

control?

Data 1 1 1 1 0 0 1 1 0 0
Description read

⇓ Response module (DLC = 3)

Byte Identifier DATA_ID DATA_1 DATA_0
Bit ID1 ID0 7 6 5 4 3 2 1 0 7 ... 0 7 ... 0

Designation EXT_

INSTR

DATA
_DIR

N3 N2 N1 N0 LSB

Data 1 0 1 1 0 0 1 1 0 0 x
Description write x=1: Channel is working correctly

x=0: Channel is not working correctly
LSB = Channel 1

Group access : Status4 (Read-write/Write access), extended access list
Read-write

Byte Identifier DATA_ID Controller (DLC = 1):
Bit ID1 ID0 7 6 5 4 3 2 1 0 Control of sense line (is Vset = Vsense ?)

Designation EXT_

INSTR

DATA

_DIR
Data 1 1 1 1 0 1 0 0 0 0
Description read

⇓ Response module (DLC = 3)

Byte Identifier DATA_ID DATA_1 DATA_0
Bit ID1 ID0 7 6 5 4 3 2 1 0 7 ... 0 7 ... 0

Designation EXT_

INSTR

DATA

_DIR

N3 N2 N1 N0 LSB

Data 1 0 1 1 0 1 0 0 0 0 x
Description write

x=1: Vset ≠ Vsense (Sense error)
x=0: Vset = Vsense (± tolerance)
LSB = Channel 1

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Group access: General status module (Read-write/Write/Active access)

Read-write

Byte DATA_ID Controller (DLC = 1):
Bit 7 6 5 4 3 2 1 0 Read status at the corresponding module

Designation DATA

_DIR
Data 1 1 1 0 0 0 0 0 0
Description read

⇓ Response module (DLC = 2)

Byte DATA_ID DATA_0
Bit 7 6 5 4 3 2 1 0 7 5 4 3 2 1 0

Designation DATA

_DIR
Data 0 1 1 0 0 0 0 0 0 u v w x y z
Description write z=1 ‘Status channel’ bit c & v & t & s = 0 for all channels:

no current limit/trips and no voltage limit have been
exceeded in the module, sense is okay

z=0 current limit/trips or voltage limit have been

exceeded or sense line interrupted at least one channel

y=1 no channel is ramping
y=0 VO is ramping at least one channel

x=1 safety loop is closed
x=0 VO was shut off with safety loop, if safety loop is closed

again the bit will be set with the first read

w=1 VO is ramping at least one channel

with ADC filter frequency fN = 100 Hz

w=0 all channels are stable with

programmable ADC filter frequency f

N

(ADC conversion time = 1 / fN , see
‘ADC filter frequency setting‘, ex works fN = 50 Hz)

v=1 averaging ON
v=0 averaging OFF

u=1 voltage supplies in range
u=0 voltage supplies out of range

Write (Controller [DLC = 2]: Write averaging ON / OFF)

Byte DATA_ID DATA_0
Bit 7 6 5 4 3 2 1 0 7 ... 4 ... 0

Designation DATA

_DIR
Data 0 1 1 0 0 0 0 0 0 masked v masked
Description write v=1 averaging ON

v=0 averaging OFF

If the averaging is ‘ON’ then the voltage and current measurement will work with a ‘Weighted Average
Calculation’ of 16 ADC measurement values.

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Active (Module [DLC = 2]: Module sends total error active with high priority, response time < 150 ms)

Byte Identifier DATA_ID DATA_0
Bit 7 6 5 4 3 2 1 0 7 5 4 3 2 1 0

Designation ID9 DATA

_DIR

Data 0 1 1 1 0 0 0 0 0 0

u

v w

x

y

z

Description active If u & x & z = 0, then the module send once active this

error frame with ID9 = 0

The module has been configured as one CAN-node with an Active-CAN message function (see Group access:
Serial number, software release and CAN message configuration). In this case the module will send this
group access as an active error message with higher priority (ID9 = 0) than normal messages, only if one of the
sumstatus- and safety loop-bits in the group access “General status module” not has been set.

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Group access: Status1 Voltage limit (Read-write access)

Byte DATA_ID Controller:
Bit 7 6 5 4 3 2 1 0 Check exceeding voltage limit per channel

Designation DATA

_DIR
Data 1 1 1 0 0 0 1 0 0
Description read

⇓ Response module (DLC = 3)

Byte DATA_ID DATA_1 DATA_0
Bit 7 6 5 4 3 2 1 0 7 ... 0 7 ... 0

Designation DATA

_DIR
Data 0 1 1 0 0 0 1 0 0 x15 ... x8 x7 ... x0
Description write

x0 ⇒ Status for Channel 0 xn = 0 ⇒ Channel ok

:

x7 ⇒ Status for Channel 7 xn = 1 ⇒ Voltage limit has

been exceeded

If an external over voltage occurs at the channel output (i.e. Output voltage > Set voltage) then the channel will
be switched off and the according bit will be set. Only after the read of ‘Status 1 voltage limit’ this bit will be
cancelled.

Group access: Status2 Hardware current limit (Read-write access)

Byte DATA_ID Controller (DLC = 1):
Bit 7 6 5 4 3 2 1 0 Check exceeding hardware current limit per channel

Designation DATA

_DIR
Data 1 1 1 0 0 1 0 0 0
Description read

⇓ Response module (DLC = 3)

Byte DATA_ID DATA_1 DATA_0
Bit 7 6 5 4 3 2 1 0 7 ... 0 7 ... 0

Designation DATA

_DIR
Data 0 1 1 0 0 1 0 0 0 x15 ... x8 x7 ... x0
Description write

x0 ⇒ Status for Channel 0 xn = 0 ⇒ Channel ok

:

x7 ⇒ Status for Channel 7 xn = 1 ⇒ Hardware

current limit has been
exceeded.

The module responds to the exceeding of the hardware current limit which has been set in the channel in
dependence to the according KILL-enable bit (see also Group access ‘KILL-enable’) as follows:

KILL-enable = 1: Voltage will be switched off permanently without ramp, green LED on front panel is off.
KILL-enable = 0: Voltage will be switched off without ramp, green LED on front panel is off. If the output

voltage arrives at 0 V ramping to set voltage will be started automatically again.
The green LED flashes on again only after the Group access ‘Status2 Current limit’ has
been read.

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Group access: Channel ON / OFF (Read-write /Write access)

Read-write

Byte DATA_ID Controller (DLC = 1):
Bit 7 6 5 4 3 2 1 0 Check Channels ON or OFF

Designation DATA

_DIR
Data 1 1 1 0 0 1 1 0 0
Description read

⇓ Response module (DLC = 3)

Byte DATA_ID DATA_1 DATA_0
Bit 7 6 5 4 3 2 1 0 7 ... 0 7 0

Designation DATA

_DIR
Data 0 1 1 0 0 1 1 0 0 x15 ... x8 x7 ... x0
Description write

x0 ⇒ Bit for Channel 0 xn = 1 ⇒ Channel ON

:

x7 ⇒ Bit for Channel 7 xn = 0 ⇒ Channel OFF

Write (Controller [DLC = 3]: Channels shut ON or OFF define)

Byte DATA_ID DATA_1 DATA_0
Bit 7 6 5 4 3 2 1 0 7 ... 0 7 ... 0

Designation DATA

_DIR
Data 0 1 1 0 0 1 1 0 0 x15 x8 x7 x0
Description write

x0 ⇒ Bit for Channel 0 xn = 1 ⇒ Channel ON

:

x7 ⇒ Bit for Channel 7 xn = 0 ⇒ Channel OFF

Group access: Emergency cut-off (Write access)

Controller (DLC = 3): Channels ‘Emergency cut-off’
Byte DATA_ID DATA_1 DATA_0

Bit 7 6 5 4 3 2 1 0 7 ... 0 7 ... 0
Designation DATA

_DIR
Data 0 1 1 0 1 0 1 0 0 x15 x8 x7 x0
Description write x7 ... x0: for xn = 1: Channel 7 ... Channel 0

Channels cut-off without ramp

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Group access: Ramp speed (Read-write /Write access)

Read-write

Byte DATA_ID Controller (DLC = 1):
Bit 7 6 5 4 3 2 1 0 Read actual ramp speed of module

Designation DATA

_DIR
Data 1 1 1 0 1 0 0 0 0
Description read

⇓ Response module (DLC = 3)

Byte DATA_ID DATA_1 DATA_0
Bit 7 6 5 4 3 2 1 0 7 ... 0 7 0

Designation DATA

_DIR
Data 0 1 1 0 1 0 0 0 0 ... x8 x7 ... x0
Description write x8 ... x0:

Ramp speed of module with resolution V

O max

/ 50000s

Write (Controller [DLC = 3]: Write ramp speed module)

Byte DATA_ID DATA_1 DATA_0
Bit 7 6 5 4 3 2 1 0 7 ... 0 7 0

Designation DATA

_DIR
Data 0 1 1 0 1 0 0 0 0 ... x8 x7 ... x0
Description write x8 ... x0:

Ramp speed of module with resolution V

O max

/ 50000s
Ramp speed range:
V

O max

/ 2500s ≤ Ramp speed ≤ V

O max

/ 10s )

1

Ramp speed higher than the maximum module specific
ramp speed will be ignored and the Bit ‘ Input error’ in the

‘Status channel’ will be set.

)1 : sub values are rounded down to the next lower value, according to the resolution.

Group access: Set voltage for all channels (Write access)

Controller (DLC = 4): Set voltage for all channels
Byte DATA_ID DATA_2 / DATA_1 DATA_0

Bit 7 6 5 4 3 2 1 0 7 ... 0 7 ... 0
Designation DATA

_DIR

LSB

Data 0 1 1 1 0 0 1 0 0
Description write Set voltage for all channels with resolution

V

O max

/ 10∗exp6 [V] in DATA_2 to DATA_0

If any channel is ‘ON’ then the voltage of which will be ramped on set voltage after the receipt of this write
access.
If any channel is ‘OFF’ then the set voltage of which will be stored in the module and after the channel will be
switched ‘ON’ ramping will be started up to the set voltage.

Set voltages higher than the maximum specific module voltage are ignored and the bit ‘Input Error’ in ‘Status
channel’ will be set.

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Group access: Bit rate (Read-write/Write access)

Read-write

Byte DATA_ID Controller (DLC = 1):
Bit 7 6 5 4 3 2 1 0 Read actual bit rate

Designation DATA

_DIR
Data 1 1 1 0 1 1 1 0 0
Description read

⇓ Response module (DLC = 3)

Byte DATA_ID DATA_1 DATA_0
Bit 7 6 5 4 3 2 1 0 7 ... 0 7 0

Designation DATA

_DIR
Data 0 1 1 0 1 1 1 0 0 ... x8 x7 ... x0
Description write x8 ... x0: actual bit rate [kbit/s]

Write (Controller [DLC = 3]: Write a new bit rate)

Byte DATA_ID DATA_1 DATA_0
Bit 7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0

Designation DATA

_DIR

LSB

Data 0 1 1 0 1 1 1 0 0 x8 x7 x6 x5 x4 x3 x2 x1 x0
Description write x8 ... x0: - 7 Bit rates are possible:

1) 20 kbit/s

2) 50 kbit/s

3) 100 kbit/s

4) 125 kbit/s

5) 250 kbit/s

6) (500 kbit/s on request)

7) (1000 kbit/s on request)

- the new bit rate gets active after RESET
respectively POWER OFF/ON

and

- it has to be sure that the bit rate of all modules
in the system must be the same before a
RESET or POWER/ON is made.

- bit rate is prefixed from factory signed on a
sticker of the 96 pin connector.

- invalid bit rates will be ignored from the module
and the bit ‘Input error’ of the ‘Status channel 0’
will be set.

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Group access: Serial number, software release and CAN message configuration

(Read-write/ Write access)

Read-write

Byte DATA_ID Controller (DLC = 1):
Bit 7 6 5 4 3 2 1 0 Read serial number and software release module

Designation DATA

_DIR
Data 1 1 1 1 0 0 0 0 0
Description read

⇓ Response module (DLC = 7)

Byte DATA_ID DATA_5 DATA_4 DATA_3 DATA_2 DATA_1 DATA_0
Bit 7 6 5 4 3 2 1 0 BCD BCD BCD BCD BCD BCD BCD BCD BCD BCD BCD BCD

Designation DATA

_DIR
Data 0 1 1 1 0 0 0 0 0 z6 z5 z4 z3 z2 z1 p2 y3 y2 y1 p1 c1
Description write 6 BCD Serial number 3 BCD Soft-

ware release

c1: 1 BCD existing channels

Write (Controller [DLC = 2]: Write a new CAN message configuration)

Byte DATA_ID DATA_0
Bit 7 6 5 4 3 2 1 0 BCD BCD

Designation DATA

_DIR
Data 0 1 1 1 0 0 0 0 0 0 x
Description write x = 2: with iseg Standard-CAN message

ID9 is always dominant

x = 4: with iseg Active-CAN message

ID9 is recessive

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Group access: ADC filter frequency setting (Read-write/Write access)

(Programmable ADC conversion time = 1 / fN , fN ... filter first notch frequency)

Read-write

Byte DATA_ID Controller (DLC = 1):
Bit 7 6 5 4 3 2 1 0 Read actual ADC filter frequency f

N

Designation DATA

_DIR

- If all channels are stable then this ADC filter frequency f

N

is active
Data 1 1 1 1 1 0 0 0 0 - If VO is ramping at least one channel then the ADC filter
Description read

frequency is fN = 100 Hz

⇓ Response module (DLC = 3)
Byte DATA_ID DATA_1 DATA_0

Bit 7 6 5 4 3 2 1 0 7 ... 0 7 0
Designation DATA

_DIR
Data 0 1 1 1 1 0 0 0 0 x15 x8 x7 ... x0
Description write ADC filter frequency fN = 19200 / (x15 ... x0) [Hz]

Write (Controller [DLC = 3]: Write new ADC filter frequency f

N

)

Byte DATA_ID DATA_1 DATA_0
Bit 7 6 5 4 3 2 1 0 7 0 7 6 5 4 3 2 1 0

Designation DATA

_DIR

LSB

Data 0 1 1 1 1 0 0 0 0 x15 x8 x7 x0
Description write (x15 ... x0) = 19200 / ADC filter frequency fN [Hz]

with 5 Hz ≤ fN ≤ 100 Hz (invalid fN will be ignored and the bit
‘Input-error’ in ‘Status channel’ is set).

- if all channels arrive at V

set

the first time, further
measurements are made with this filter frequency. I.e.:
V

set

will be compared to V

actual

averaging according to f

N

- factory setting: fN = 50 Hz

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Group access: KILL-enable (Read-write /Write access)

Read-write

Byte DATA_ID Controller (DLC = 1):
Bit 7 6 5 4 3 2 1 0 Read setting KILL function

Designation DATA

_DIR

KILL - enable: VO shut off permanently

if hardware current limit has been exceeded

Data 1 1 1 1 0 1 1 0 0

KILL - disable: VO shut off if current limit has been exceeded

Description read

and then VO is ramping from 0 V to V

SET

again

⇓ Response module (DLC = 3)

Byte DATA_ID DATA_1 DATA_0
Bit 7 6 5 4 3 2 1 0 7 ... 0 7 0

Designation DATA

_DIR
Data 0 1 1 1 0 1 1 0 0 x15 ... x8 x7 ... x0
Description write

x0 ⇒ Bit for Channel 0 xn = 1 ⇒ KILL - enable

:

x7 ⇒ Bit for Channel 7 xn = 0 ⇒ KILL - disable

Write (Controller [DLC = 3]: Set KILL function)

Byte DATA_ID DATA_1 DATA_0
Bit 7 6 5 4 3 2 1 0 7 ... 0 7 ... 0

Designation DATA

_DIR
Data 0 1 1 1 0 1 1 0 0 x15 x8 x7 x0
Description write

x0 ⇒ Bit for Channel 0 xn = 1 ⇒ KILL - enable

:

x7 ⇒ Bit for Channel 7 xn = 0 ⇒ KILL - disable

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Group access: Module nominal values (Read-write access)

Byte DATA_ID Controller (DLC = 1):
Bit 7 6 5 4 3 2 1 0 Read Voltage and Current nominal values of the module

Designation DATA

_DIR
Data 1 1 1 1 1 0 1 0 0
Description read

⇓ Response module (DLC = 5)

Byte DATA_ID DATA_3 DATA_2 DATA_1 DATA_0
Bit 7 6 5 4 3 2 1 0 7 ... 0 7 ... 0 7 ... 0 7 ... 0

Designation DATA

_DIR
Data 0 1 1 1 1 0 1 0 0 x ... x x ... x x ... x x ... x
Description write Mantissa

V

max

Exponent

V

max

Mantissa

I

max

Exponent

I

max

Group access: Status3 Current limit (Read-write access)

Byte DATA_ID Controller (DLC = 1):
Bit 7 6 5 4 3 2 1 0 Check if the output current the software current trip per

Designation DATA

_DIR

channel exceeds

Data 1 1 1 1 1 1 0 0 0
Description read

⇓ Response module (DLC = 3)

Byte DATA_ID DATA_1 DATA_0
Bit 7 6 5 4 3 2 1 0 7 ... 0 7 ... 0

Designation DATA

_DIR
Data 0 1 1 1 1 1 0 0 0 x15 ... x8 x7 ... x0
Description write

x0 ⇒ Status for Channel 0 xn = 0 ⇒ Channel ok

:

x7 ⇒ Status for Channel 7 xn = 1 ⇒ Output current

has been exceeding the
programmable current trip.

If the measured output current exceeds the programmed current trip then the corresponding bits will be set.
The output voltage is not present and the channel is ‘OFF’ (Bit o = 0 in ‘Status channel’). A programmed
current limit with value zero has no effect to the current flow.

The setting bits in DATA_1 and DATA_0, the bit t in ‘Status channel’ and the bit z in ‘General status module’
will be reset after this access.

With help of the ‘Group access’ ‘Switch ON /OFF’ the concerning channels are switched ‘ON’ again.

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4.4 Implementation in the CAN-Bus

The data frame structure is matched to the message frame of the standard-format according to CAN
specification 2.0A, whereas looking from the point of view of the CAN protocol a pure data
transmission will be done, which is not applying to the protocol.

The data frame of the DCP will be transferred as data-word with n bytes length in the data field of
the CAN frames according to the specific demands of the respective access. Therefore this results
into a Data Length Code (DLC) of the CAN-protocol of n.

It is possible to transfer 8 data bytes that apply to the DLC field with falling values.
The RTR Bit is always set to zero.
The information for the direction of the data transfer (DATA_DIR) is written in the lowest bit ID0 of

the 11 Bit CAN-Identifier.
The controller therefore will start a read-write access for data with DATA_DIR = 1 and will send with

DATA_DIR = 0.
The Front-end device responds to the data request with sending the corresponding data with

DATA_DIR = 0.
Only if the Front-end device is not registered at the controller respectively if it does not receive valid

data during a longer time period (ca. 1 min), then it will actively send the registration frame with
DATA_DIR = 1 (see also item 4.3)

Therefore it follows that all even CAN-ports (Identifier) are interpreted as ‘Write ports’ all odd CAN
ports as ‘ Read ports’.

The addressing of the Front-end device is also made with the 11 bit identifier of the CAN protocol.
In order to keep the CAN segment open also for other protocols, the addressing room was limited to

64 nodes.

ID10 is dominant.
ID9 - is always dominant for module’s witches have not an Active-CAN message function.

- is recessive for module’s witch have an Active-CAN message function when receive or
send write- or read- write-accesses and is dominant when the module active send a
error message.

The module was configured as a CAN-node with an Active-CAN message function (see Group
access: Serial number, software release and CAN message configuration). In this case the
module will send this group access as an active error message with higher priority (ID9 = 0)
than normal messages, if one of the sumstatus- and safety loop-bits in the group access
“General status module” not has been set.

ID3 to ID8 allows to address up to 64 Front-end devices (ID3: A0 = 20 ;...; ID8: A5 = 25 ),
ID2 is not used.
In one CAN segment only modules are allowed with different identifiers and the same bit rates.

The factory fixed bit rate is written on the sticker of the 96-pin connector.

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Following data frame is valid for the control of the Front-end device in this lowest CAN segment.

S Identifier R DLC n – data bytes CRC ack
O T 0 0

(n = 1 - 8) DATA_ID

DATA_(n-2) ≥ 0 DATA_(n-3) ≥ 0

DATA_ ...

F.

F

b10 b0

R

Reserv

b3 b0 b7=1 b0 b7 b0 b7 b0 b7 b0 15 bit

ID10 ID9 ID8 ID7 ID6 ID5 ID4 ID3 ID2 ID1 ID0

0 P A5 A4 A3 A2 A1 A0 EXT

_IN

STR

DATA

_DIR

Acceptance-Filter of the used CAN-Controller is

set to Front-end-address

The Front-end device must do:

- Processing of the single accesses with direct channel values.

- Processing of group information of the channels.

- Self-registration in the higher level through sending the module address.

- Building of status information.

- Sending an active error message with higher priority if one of the sumstatus- and safety loop -bits
in the group access “General status module” has not been set (the module must be configured as
a CAN-node with an Active-CAN message function).

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Appendix A: Side view

Desk open, jumper for safety-loop