Junger Audio C8817 User Manual

digital audio
modular
processing system

C8000

Electrically Isolated GPI/O

C8817

features :

• Parallel remote interface GPI/O

• Electrically isolated I/Os

• 8 GPI by optical coupler with current source and bridge circuit

• Inverter for input logic

• 8 GPO (TALLY) relays with change over contact (N.O.)

• Inverter for output logic

• Electrically isolated 5V aux voltage supply

functional description:

Each of the 8 GPOs may be addressed from C8k modules (see module manual)
by sending a predefined GPO number to the CAN bus. The C8817 is permanently
listening to the CAN bus. If it reads such a number, the associated GPO
will be activated. There is a maximum of 127 GPO numbers.
The GPOs may be logically inverted, i.e. a N.O. relay contact becomes N.C.

If one of the 8 GPI inputs is activated, the C8817 will send a predefined
GPI number to the CAN bus. C8k modules are permanently listening
to the CAN bus for such numbers. If any of the C8k modules reads such a number,
the predefined action will be performed by the module.
There is a maximum of 127 GPI numbers. The GPIs may be logically inverted,
i.e. an input now needs 5V for de-activation.

principal GPI circuit :

At the GPI input there is a bridge circuit, i.e. you do not need to care about the polarity
of the input voltage. A current source in line with the optical coupler limits the current that is why
you can apply an input voltage between 5V and at most 30V to activate the GPI.

C8817-2_manual EN_150306.doc

digital audio
modular
processing system

C8000

Electrically Isolated GPI/O

electrical specifications:

GPI

On: External voltage of 5V or higher (max 30V) between GPI_x(a)

Off: External voltage lower than 2,5V between GPI_x(a) and

Duration: Minimum 50ms

GPO

Relay type: Change-over contact – N.O.
Contact rating: 1A/24 VDC 0,5 A/125 VAC/ max. 62,5VA

General

Backplane connector: Ref. to DIN41612, 64pin, a+b, male
Power supply: +5V DC
Consumption: Approx. 120mA
Dimensions: 3RU, 4HP, depth 160mm
Installation: Hot pluggable

and GPI_x(b)

GPI_x(b) max. 60 VDC / 30 W / max. 125

max. 60 VDC / 30 W / max. 125

C8817

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digital audio
modular
processing system

C8000

installation

Electrically Isolated GPI/O

C8817

CAN ADDR Set the CAN ADDR rotary encoder to an address, which is not in

use by another module of a C8000 frame (for details regarding

SW3A Towards the bottom enables the CAN “+16” address schema to

SW3B Not used, must be set towards the bottom.
INIT Pressing the INIT button during power up will initialize the module

CAN addressing, see C8000 system manual).

handle up to 32 modules. If "+16" is turned on, addresses set by
the rotary encoder counting from 0x10 to 0x1F.

parameters to factory default values.

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