C76 20

SPECIFICATIONS ARE SUBJECT TO CHANGE WITHOUT NOTICE

© 2002 TELEDYNE RELAYS

C76\072002\Q1

Optically isolated

computer input/output modules

APPLICATIONS

• Robotics

• Programmable Controllers

• Process Control

• Machine Tool Control

• Energy Management

• Automatic Test Equipment

FEATURES/BENEFITS

• Input Enable Function: For computer timing

function control.

• Floating Outputs: Eliminates ground loops and

signal noise. Protects computer I/O and logic

circuits

• Low Off-State Leakage: High off-state

impedance

• Switches/Controls High Voltages: To 250 Vrms

Switches/Controls High Currents: To 1.0 Arms

• High Noise Immunity: Control signals isolated

from switching noise

• High Dielectric Strength: Safety and protection

of control and signal level circuits

DESCRIPTION

The Series C76 solid-state computer input/output

modules are designed expressly for application in

computerized control systems where reliable

noise-free interface of switching is required to

isolate computer logic elements from high

conducted noise encountered in industrial

environments. Sensitive logic circuitry is kept

noise-free by means of optical isolation between

logic and power lines.

Output modules allow either TTL or CMOS level

signals to control the switching of power to high

voltage and high current loads. Hysteresis at the

input significantly increases the noise margin when

used in the CMOS input mode, preventing false

triggering in noisy environments

Input modules convert the presence or absence

of load level voltages from pressure, flow,

temperature and other transducers, limit switches,

solenoids or relays to “clean” low level logic signals

for computer input. An ENABLE function maintains

the module’s output in an “open” state until the

ENABLE terminal is brought up to the bias supply

level.

Series C76

C76 I/O INTERFACE SYSTEM