User`s manual
AEQ FORUM 
Digital audio mixer for broadcast applications 
21
On request, this wiring kit can be supplied with connectors explicitly specified by the customer. 
For more information please refer to AEQ sales department or authorised distributors. 
2.2.2.1.2. Opto-coupled GPO. 
The AEQ FORUM includes 8 electronic interface of opto-coupled type GPOs through the two 
male DB9 connectors in the “GP OUTPUTS” section. One of them houses the GPOs numbered 
from 1 to 4 and the other one from 5 to 8. 
Specifications:
•  Opto-coupler protected outputs (TLP127). 
•  Maximum current: 80mA. 
•  Recommended Maximum voltage: 200V. 
•  Maximum power: 100mW at 40 ° C. 
•  Requires external power. 
Electronic associated with opto-coupled GPO 
In order to simplify the installation phase, AEQ offers a prefabricated wiring kit specifically for 
GPO outputs: CAB FR GPO, female DB9 connector soldered to 4 meters of cable open-end 
termination for GPO. More information in section 2.2.4 of this manual. 
GPO outputs (2 x SUB-D male 9 pin): 
Pin 
GP OUTPUTS 1 To 4 
connector 
GP OUTPUTS 5 To 8 
connector 
1 GPOUT1  GPOUT5 
2 GPOUT2  GPOUT6 
3 GPOUT3  GPOUT7 
4 GPOUT4  GPOUT8 
5  Not connected  Not connected 
6 GND_GPOUT1  GND_GPOUT5 
7 GND_GPOUT2  GND_GPOUT6 
8 GND_GPOUT3  GND_GPOUT7 
9 GND_GPOUT4  GND_GPOUT8 
On request, this wiring kit can be supplied with connectors explicitly specified by the customer. 
For more information please refer to AEQ sales department or authorised distributors. 
2.2.2.1.3. Physical contact GPO. 
The AEQ FORUM includes 4 physical contact type GPOs through the two male DB9 connectors 
in the “RELAY” section. One of them houses the GPOs numbered from 1 to 2 and the other one 
from 3 to 4. 
Specifications: 
•  Contact closure relay. 
•  Maximum current: 1 A @ 30 v. DC, 0.3 A @ 125 V AC. 
•  Maximum voltage: 60 V DC or 125 v. AC. 
•  Maximum power: 30 VA. 










