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MAXX-2400HD Owner’s Manual Page 119
BNC Connectors
The following note applies to all video and Genlock connectors:
• A BNC connector used as an output has a 75-ohm source impedance.
• A BNC connector used as an input has a 75-ohm termination.
GPIO Connectors
General purpose control inputs (GPI) may be applied to the GPIO connectors, which are
DB-25 pin connectors. These inputs are optically isolated from the server circuitry; individual
floating returns are provided. +5 volts may be sourced from pins 18 or 26, or provided from an
external source. Current limiting devices are provided within the server.
General purpose status outputs also appear on the GPIO connectors. Open-collector outputs
are provided as status outputs, and may be used to drive an external LED or control input.
Refer to the connector pin-out table and partial schematic, following. Inputs and outputs 1-6
are on connector 1, 7-12 are on connector 2, shown in parentheses. The schematic applies to both
connectors as well.
GPI Connector Pinout
Pin Signal Pin Signal
2 GPI 1 (GPI 7) 1 GPI 1 RTN (GPI 7 RTN)
4 GPI
2
(GPI 8) 3 GPI
2
RTN
(GPI 8 RTN)
6 GPI
3
(GPI 9) 5 GPI
3
RTN
(GPI 9 RTN)
8 GPI
4
(GPI 10) 7 GPI
4
RTN
(GPI 10 RTN)
10 GPI
5
(GPI 11) 9 GPI
5
RTN
(GPI 11 RTN)
12 GPI
6
(GPI 12) 11 GPI
6
RTN
(GPI 12 RTN)
13,14 N/C 17 N/C
15,
16,
19
GND 18,
26 +5V
S
OURCE
(200
M
A
MAX
)
20 GPO
1
(GPO 7) 21 GPO
2
(GPO 8)
22 GPO
3
(GPO 9) 23 GPO
4
(GPO 10)
24 GPO
5
(GPO 11) 25 GPO
6
(GPO 12)