TTL Output Module
Cat. No. 1771OG
Installation Instructions
This document provides information on:
important pre-installation considerations
power supply requirements
initial handling procedures
installing the module
using the indicators for troubleshooting
module specifications
You can use any TTL device that meets the input logic level specification
of -0.2V dc to +0.8V dc (low), and 2.0V dc to 5.25V dc (high).
The TTL module requires power from two sources: the I/O chassis
backplane, and a +5V dc power supply that you provide for transmission
of TTL signals.
Backplane
The TTL module receives its power through the 1771 I/O chassis
backplane from the chassis power supply. The module requires 168mA
from the output of this supply. Add this to the requirements of all other
modules in the I/O chassis to prevent overloading the chassis backplane
and/or backplane power supply.
Customer Supply
You must provide a se5(+0.25)V dc power supply for TTL outputs
from the module and for your TTL input devices. Your module requires
250mA from the output of your supply. Ripple should not exceed 50mV
peak to peak.
To The Installer
Preinstallation
Considerations
Power Requirements