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DRA Series Contactors
DC Motor Reversing Contactors
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.
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.
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
maximum (IEC 0.5-2.5 mm
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
terminal screw torque output 4.3 lbs in (0.5 Nm).
If multiple units are installed be sure to follow derating curve (fig. 2).
2
), choose wire gauge according to load current. Maximum recommended
2
), choose wire gauge according to load current. Maximum recommended
AWG mi
nimum, 12 AWG
PART NUMBER NOMENCLATURE
Operational Voltage Range
100: 1-100 VDC
Series
Function
4D: H-Bridge
TO REMOVE FROM
DIN RAIL
TO INSTALL ON DIN RAIL
fig. 1 Mounting/Dismounting contactor on DIN rail.
250: 1-250 VDC
12100 DDRA 4D
Control Voltage
D: 5 VDC
E: 24 VDC
Operational Current
6: 6 Amps/¼ HP @ 180 VDC
(250 suffix only)
12: 12 Amps/¼ HP @ 90 VDC
(100 suffix only)
Rev: 050911
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DERATING CURVE
12.0
10.0
(A,B)
DRA4D100x12
DRA4D250x6
8.0
6.0
4.0
2.0
Load Current (Amps)
0.0
0 10 20 30 40 50 60
fig. 2 Derating Curve for
DC Motor Reversing Contactor.
Ambient Temperature (°C)
Temp.
40°C ¼ HP 4 FLA @ 90 VDC
60°C ¼ HP 3 FLA @ 90 VDC
(A)
Unless otherwise noted, all ratings are at 0 mm air gap for adjacent similar parts.
(B)
Resistive Load Current rating for DRA4D250x6 is 5.5 A @ 0 mm air gap. For maximum ratings use 45 mm air gap
(C)
No grounding wire required. DC inductive loads must be diode suppressed
(D)
3 Input control terminal screws M2.5 Slotted Drive
(E)
4 Output terminal screws (+ & -/M1 & M2) M2.5 Combo Drive
(F)
Minimum wire strip length 0.197 in [5 mm], maximum 0.235 in [6 mm] for input and output terminals
RISK OF MATERIAL DAMAGE AND HOT ENCLOSURE
• The product's side panels may be hot, allow the product to
cool before touching.
• Follow proper mounting instructions including torque values.
• Do not allow liquids or foreign objects to enter this product.
Failure to follow these instructions can result in serious injury,
or equipment damage.
DRA4D100x12 DRA4D250x6
6 6
WARNING
¼ HP 2 FLA @ 180 VDC
¼ HP 1 FLA @ 180 VDC
DANGER
HAZARD OF ELECTRIC SHOCK,
EXPLOSION OR ARC FLASH
•
Turn off power supply before
working on this equipment.
Failure to follow these instructions
will result in death or serious injury.
S1
+ -
S2
S2
Open
Open
Closed
Closed
(C, F)
F
R
Forward
Off
On
Off
Off
(E)
+
M1
-
M2
(D)
Reverse
Off
Off
On
Off
fig. 3 Wiring Diagram for
DC Motor Reversing Contactor.
WIRING DIAGRAM
S1
Open
Closed
Open
Closed
TIME DIAGRAM
Input/Output 123456789 10
S1 switc h
S2 switc h
FWD Direction
REV Direction
20 msec interlock
cesm 02cesm 02
+
-
Rev: 050911
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