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506/507/508 - HA389427
Chapter 1
P
RODUCT
O
VERVIEW
Description
The 506/507/508 series controllers are compact, non-isolated motor
speed controllers specifically designed for dc shunt would and
permanent magnet motors. The controllers are intended to operate
from a single phase AC mains supply in the ranges 110/120V AC or
220/240V AC 50/60Hz.
The controllers are intended to be mounted on a length of DIN rail in
an enclosure.
Control of the associated DC motor is achieved by using a linear
closed loop feedback signal based on the motor's own DC armature
voltage. This enables constant motor speed to be maintained
throughout variable motor loads. Improved speed measurement can
be obtained by using a tacho-generator, connected to the motor's
shaft, to provide the feedback signal.
A current loop within the speed feedback path ensures that safe
current levels are always provided to the armature of the motor up to
the level set by the maximum current potentiometer (Imax). This
adjustment is linear and switchable to a lower range of half the
controller current.
If the controlled motor is stalled (e.g. due to either a faulty field
circuit or an excessive load), then a stall timer will remove current
from the motor after approximately 15 seconds. Severe armature
current overloads, are protected against by an instantaneous over-
current trip.
The controllers may also be used in a linear motor torque mode by
using an adjustable setpoint. In this mode of operation over-speed
limiting is a standard feature.
Product Range
Product
Rating
Adjustment
Switched
Standard
506
3A DC Full Load Current
0.5 to 3A
0.25 to 1.5A
507
6A DC Full Load Current
1 to 6A
0.5 to 3A
508
12A DC Full Load Current
2 to 12A
1 to 6A
