Chapter 9 I/O Electrical Feature And Wiring; I/O Introduction; I/O Electrical Feature; Differential Input Circuit - HikRobot MV-CL042-91CM User Manual

Camera Link Line Scan Camera User Manual
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Chapter 9 I/O Electrical Feature and Wiring

9.1 I/O Introduction

The I/O signals of type I and type III cameras are four configurable input or output signals (Line
0/1/3/4). The Line 0/1/3/4 can be set as differential input or differential output according to actual
demands.
The I/O signals of type II camera are two differential input signals (Line 0/3), and two differential
output signals (Line 1/4).

9.2 I/O Electrical Feature

9.2.1 Differential Input Circuit

The differential input signals in I/O signals supports the single-ended input, and their internal
circuit is shown below.
Figure 9-1 Internal Circuit of Differential Input
The RS-422 standard, RS-644 standard and TTL&LVTTL standard input signal are applied to the
differential input.
 RS-422 Standard Input
In order to make sure the normal operation of input circuit, it is required to connect camera's
ground signal with external ground signal if the differential input adopts RS-422 standard signal.
RS-422 standard defines the connection of the bus structure, and the inputs of several cameras can
be connected to the RS-422. Up to 10 cameras can be connected at the same time, of which only
one camera is the main dispenser and other cameras are receivers. The circuit length between the
45