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

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

4 GmbH D - 01454 Rossendorf Germany

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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iseg c/o ROTECH Email: [e-mail] Phone ++ 49 351 / 26 95 - 260
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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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iseg c/o ROTECH Email: [e-mail] Phone ++ 49 351 / 26 95 - 260
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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’.