Communications And Aux I/O; General Purpose Inputs And Outputs; Table 2-1: Comm And Aux I/O Pinout; Table 2-2: Comm And Aux I/O Physical Layout - evertz 7735CEM Manual

2.2.

COMMUNICATIONS AND AUX I/O

The rear female DB-9 connector has RS-232 DCE connections and also contains GPIs and GPOs.
Name
GPI1
GPI2
GPO1
GPO2
Rx
Tx
NC
NC
gnd
The physical layout is similar to the following:

2.2.1. General Purpose Inputs and Outputs

The GPI's are active low with internal pull up resistors (4.7k Ohms) to +5V.
lower the signal to near ground potential (i.e. connect to shell or chassis ground). This can be done with a
switch, relay, TTL drive, GPO output or other similar method. Figure 2-2 shows the input circuit for the
General purpose inputs.
Gray background indicate un-implemented or un-tested features
Description
General Purpose Input 1
General Purpose Input 2
General Purpose Output 1
General Purpose Output 2
RS-232 (output)
RS-232 (input)
Reserved
Reserved
Ground

Table 2-1: Comm and Aux I/O Pinout

1 GPI 1
2 TxD (out)
3 RxD (in)
4 GPO 1
5 gnd
The shell is also grounded.

Table 2-2: Comm and Aux I/O Physical Layout

Revision 1.1.1
7735CEM Composite Encoder with Monitoring
DB-9
1
6
4
9
2
3
7
8
5, Shell
6 GPI 2
7 NC
8 NC
9 GPO 2
7700 MultiFrame Manual
To make an input active,
7735CEM-5