E-20 Technical Specifications
DC590+ Series DC Digital Drive
Terminal Information - Power Board (Frames 1-5)
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
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