1
Introduction
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1 Introduction
Introduction
The 340i / 680i/ 1220i DC Drive is an isolated, single-direction speed controller for brushed
shunt wound or permanent magnet DC motors.
This Class 1 product has basic insulation and a protective earth. Its control signals are
isolated from the mains AC supply, and their connection to other isolated instruments is
permitted.
The drive can motor forwards and will regenerate for reverse rotation by an external force.
It incorporates a fully controlled thyristor bridge with a current loop to protect the drive and
motor.
To control the motor speed the drive uses speed feedback derived from either the armature
voltage or from a shaft-mounted tachogenerator. It incorporates an accurate current control
loop to protect itself and the motor.
Current loop:
full P+I current shunt feedback
Speed loop:
full P+I armature voltage or tacho feedback
Speed range:
0-100% (motor dependent)
Load regulation:
typically 0.2% Tacho, 2% Armature Volts
A model with the LV60 suffix, for example 340i LV60, denotes a low voltage version.
This component is hazardous. Please obtain expert help if you are not qualified to
install this equipment. Make safety a priority.
Read about the general risks and warnings at the front of this manual.
This apparatus complies with the protection requirements of the relevant EU
Directives. UL file: E168302.
