Technical Specifications
11-11
590+ Series DC Digital Converter
Terminal Information - Power Board (Frames 1, 2, 3, 4 & 5)
Note that on Frame 1 and 2 units, L1, L2, L3, A+ and A- terminals are located on a separate
Terminal Board. On Frame 3, 4 & 5 units, they are busbar connections.
Frame 3 units have terminal designations D1 to D8, shown in brackets in the Terminal
Number column of this table.
Terminal
Description
Terminal Function
Signal Level
Terminal
Number
Thermistor
Therm +
Isolated Thermistor Input - positive
It is good practice to protect DC motors against
sustained thermal overloads by fitting
temperature sensitive resistors or switches in the
field and interpole windings of the machine.
The controller complies with the requirements of
IEC 34-11-2-2 and is suitable for use with
Mark A detectors.
These devices have a low resistance (typically
200
:
) up to a reference temperature 125
o
C).
Above this temperature, their resistance rises
rapidly to greater than 4k
:
. The preferred
installation is for three detectors to be connected
in series between terminals Th1 and Th2.
The 590+ will indicate a motor overtemperature
alarm if the external resistance between Th1 and
Th2 exceeds 3k
:
. The alarm can be reset when
the resistance falls below 750
:
.
Terminals Th1 and Th2 must be jumpered if
overtemperature sensors are not used.
See description
MOTOR
THERMISTOR
Th1
(THERM+)
(THERM+ &
THERM –,
found on
Frame 3
units, are
located on a
separate pcb
to the left of
the power
board in the
door
assembly)
Thermistor
Therm -
Isolated Thermistor Input - negative
See description above
See description
Th2
(THERM-)
PE
Protective ground – incoming ground
-
STUDS
PE
Protective ground – motor ground
-
STUDS
PE
Protective ground
-
STUDS