Crydom CMR Series Installation Guide

Installation Note for
CMR Series

Crydoms CMR Series Solid State Relays were developed to offer the
advantages of semiconductor switching technology in a compact, self
contained package. Quick and easy installation is coupled with low drive
power requirements and efficient, reliable power SCR output. Box
Clamp terminals and LED status indication complete the package. This
compact new design offers up to 65Arms in ambient temperatures of 25°C.

Manufactured in Crydom’s ISO 9001 Certified facility for optimum product
performance and reliability.

APPROVALS: UL, CSA, VDE, CE Mark.

MOUNTING OF CMR SERIES OF SOLID STATE RELAYS

CMR Series SSRs are designed to fit to an industry standard TS35 DIN Rail. Mounting clip incorporates tabs for screw mounting to panel.

FITTING TO THE DIN RAIL

Locate rail and align with non moveable
end of CMR DIN clip Using reasonable
force, push CMR in the direction of the
arrow shown.

MOUNTING CONSIDERATIONS

To achieve maximum ratings, there
must be a minimum spacing of 40mm
between the devices in free air.

40mm
Minimum

I

N

S

P

U

U

T

T

A

S

T

INPUT

OUTPUT

CMRINST
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I

N

P

U

OUTPUT

T

INPUT

REMOVAL FROM DIN RAIL

Pull release tag in direction of arrow using
blade of screwdriver.

THERMAL CONSIDERATIONS

The CMR power switching range is based on semiconductor
technology and therefore generates heat during operation.
The following deating curves must be observed before installation.
Crydom products are rated for 100% Duty Cycle.

Load Current vs Ambient Temperature

_

75

_

CMR 65Amp

_
_

60

S

U

T

A

S

T

45

30

OUTPUT CURRENT (Arms)

15

0

!

Caution

CMR 55Amp

_
_

CMR 45Amp

_
_

CMR 35Amp

_
_

_
_
_

_
_
_

Warning - Heatsink will become hot during operation.

High Temperature

(100 % Duty Cycle)

20 40 60 80

AMBIENT TEMPERATURE (°C)

ORDERING INFORMATION

Part Number

Package Style

= CMR Series

CMR

Input (Control) Type

D = 3-32 Vdc (CMRD24)

= 4-32 Vdc (CMRD48, CMRD60)

A = 90-140 Vrms

= 18-36 Vrms (suffix E)

Output Voltage

24 = 24 - 280
48 = 48 - 530
60 = 48 - 660

Vrms
Vrms
Vrms

Output Current

35 = 35 Amp
45 = 45 Amp
55 = 55 Amp

65 = 55 Amp

AC Control Range

Blank = 90-140 Vrms
E = 18-36 Vrms

Integrated Overvoltage Protection

Blank = Not Included

P = Included

Control Mode

Blank = Zero Cross
10 = Random

CMRA2

E

4

5

3

P

0

1

Note: For detailed electrical specifications see Crydom individual data sheets.

PROTECTION

Over Current and Short Circuit

A solid state relay should be protected by a semiconductor fuse.
This type of fuse provides extremely fast opening of the circuit.
A fuse should be selected that has an I t let-through rating that
is less than the I t capability of the SSR, for the same duration.

2

Transient Over Voltage (P OPTION)

Select "P" option for internal overvoltage protection. At the
presence of high voltage transient the output of the SSR will be
triggered on, and the transient will be passed on to the load circuit
This is a non-degrading method of protection that ensures that
other SSR benefits are maintained.

Earth Bonding (Grounding)

The CKR heatsink is equiped with an earth bonding screw as is
required for Class 1 Protection, in accordance with EN 60950
(VDE 0804).

Terminations

Wire Size • Maximum wire size of AWG#12 (2.5mm) on

input and AWG#8 (3.8mm) output terminals.

Connections • Ensure that wires ends are stripped to a

minimum length of 0.4 inch (10 mm).

Recommended Screw Torque Range

• 5-6 in lb (0.6-0.7 Nm) on input and
10-15 in lb (1.1-1.7 Nm) on output terminations.

2

© 2005 CRYDOM CORP, Specifications subject to change without notice.

MECHANICAL SPECIFICATIONS

All dimensions are in inches (millimeters)

1.0

I

N

P

(44.5)

(22.9)

(25.4)

0.75

(19.1)

U

T

INPUT

OUTPUT

1.75

S

U

T

A

S

T

.9

(63.5)

2.5

(109.2)

MOUNTING
HOLE/SLOT

0.17 (4.3) DIA.

(76.2)

4.3

3.0

3.5

(88.9)

3.0

(76.2)

HEAT SINK:
BLACK ANODIZED
ALUMINUM

© 2005 CRYDOM CORP, Specifications subject to change without notice.

CMRINST
Rev. 072805
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CONTACT DETAILS

For recommended applications and more information contact:
USA: Sales Support [phone] Tech Support [phone] FAX [phone]
Crydom Corp, 2320 Paseo de las Americas, Ste. 201, San Diego, CA 92154

Email: [e-mail] WEB SITE: http://www.crydom.com
UK: [phone] • FAX [phone] Crydom International Ltd., 7 Cobham

Road, Ferndown Industrial Estate, Ferndown, Dorset BH21 7PE, Email: [e-mail].

GERMANY: [phone]

WEB SITE: http://www.crydom.com