Crydom DRA Series Contactors User Manual

Dra series contactors, Dc motor reversing contactors

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Rev: 050911

DC Motor Reversing Contactors

FEATURES

54 mm motor reversing DIN rail mountable contactor package
90 VDC & 180 VDC Operating Voltage
5 to 15 VDC & 15 to 32 VDC Input Control Voltage options available
Convenient FET switches in H-bridge configuration for Motor Reversing applications
Protective Forward/Reverse interlock built-in function
UL ratings for Resistive & Motor loads
LED Status indicator for Input Control Voltage
No heat sink required & cage style screw terminals for easy installation & reliable wire connection

INSTALLATION INSTRUCTIONS

Please read all installation instructions before using DRA Series DC Motor Reversing Contactors.

TO INSTALL ON DIN RAIL

fig. 1

Mounting/Dismounting contactor on DIN rail.

TO REMOVE FROM

DIN RAIL

PART NUMBER NOMENCLATURE

DRA series DC Motor Reversing Contactors utilize Crydom’s advanced solid state DC switching technology to
provide an integrated “H Bridge” type DC switching contactor for DC motor reversing applications. These
ready-to-use contactors feature logic compatible DC input control with status indicator and interlock and
provide a simple and easy to use control solution for DC motor reversing.
For complete specifications, see DRA Series DC Motor Reversing Contactors datasheet at www.crydom.com.

Install the contactor on the DIN rail as shown in fig. 1. Vertical mounting operation is recommended.
Wire the contactor to the input control side following the wiring diagram (fig. 3). 24 AWG minimum, 12 AWG
maximum (IEC 0.5-2.5 mm

2

), choose wire gauge according to load current. Maximum recommended

terminal screw torque input 4.3 lbs in (0.5 Nm).
Wire the contactor to the DC Line side (+ & -) and to the Load side (M1 & M2). 24 AWG minimum, 12 AWG
maximum (IEC 0.5-2.5 mm

2

), choose wire gauge according to load current. Maximum recommended

terminal screw torque output 4.3 lbs in (0.5 Nm).
If multiple units are installed be sure to follow derating curve (fig. 2).

DRA Series Contactors

12

100

D

DRA 4D

Series

Operational Voltage Range

100: 1-100 VDC

250: 1-250 VDC

Operational Current

6: 6 Amps/¼ HP @ 180 VDC

(250 suffix only)

12: 12 Amps/¼ HP @ 90 VDC

(100 suffix only)

Control Voltage

D: 5 VDC

E: 24 VDC

Function

4D: H-Bridge

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