SE Digest 178

Industrial Relays

CAD

Refer to Catalog 8501CT0101

www.se.com/us

TeSys™ D IEC Style Contact Blocks and Accessories

Table 23.89: Time Delay Auxiliary Contact Blocks Number and Type of Contacts Maximum Number perDevice TimeDelay Type Termination Type

Catalog Number

Range

Front Mounting

0.1–3s [6] 0.1–30s 10–180s 1–30s [7] 0.1–3s [6] 0.1–30s 10–180s 1–30s [7] 0.1–3s [6] 0.1–30s 10–180s 0.1–3s [6] 0.1–30s 10–180s

LADT0 LADT2 LADT4 LADS2 LADT03 LADT23 LADT43 LADS23 LADR0 LADR2 LADR4 LADR03 LADR23 LADR43

23 RELAYS AND TIMERS

Screw Clamp

On-Delay

LADT

Spring Terminal

1 N.C. and 1 N.O.

1

Screw Clamp

Off-Delay

Spring Terminal

NOTE: For Lockout Cover, see page 7 of catalog 8501CT0101. Table 23.90: Mechanical Latch Blocks [8] Unlatching Control Maximum Number per Device

LA6DK

Catalog Number [9] LAD6K10

Front Mounting

Manual or electrical

1

Table 23.91: Coil Suppressor Modules These modules clip onto the right hand side of the control relay and the electrical connection is instantly made. Adding an input module is still possible. RC Circuits (Resistor-Capacitor) • Effective protection for circuits highly sensitive to “high frequency” interference. • Voltage limited to 3 Uc maximum and oscillating frequency limited to 400 Hz maximum. • Slight increase in drop-out time (1.2 to 2 times the normal time). For Mounting On: Operational Voltage Catalog Number

LAD4

24 to48Vac 110 to 240 Vac

LAD4RCE LAD4RCU

CAD(Vac)

Varistors (Peak Limiting) • Protection provided by limiting the transient voltage value to 2 Uc maximum. • Maximum reduction of transient voltage peaks. • Slight increase in drop-out time (1.1 to 1.5 times the normal time). CAD(Vac) 24 to48Vac 50 to 127 Vac Bidirectional Peak Limiting Diode • Protection provided by limiting the transient voltage value to 2 Uc maximum. • Maximum reduction of transient voltage peaks. CAD(Vac) 24Vac 110 to 250 Vac

LAD4VE LAD4VG LAD4VU

LAD4TB LAD4TS

72Vac

Table 23.92: Coil Voltage Codes Volts (Vac/Vdc) 24 32/36

Dimensions (in./mm) CAD (VacCoil)

42/48

60/72

100

110/127 220/240

Code

B

C

E

EN

K

F

M

Table 23.93: Dimensions (See Figures at Left)

in. (mm)

in. (mm)

b

CAD (Vdc Coil or Low Consumption Vdc Coil)

CAD (Vac Coil)

32 50

323 503 3.90 (99) 3.31 (84) 3.39 (86) 4.61 (117) 5.08 (129) 5.39 (137) 5.55 (141)

32 50

323 503 3.90 (99) 3.66 (93) 3.74 (95)

c

0.49 12.5

1.77

3.03 (77) 3.31 (84) 3.39 (86) 4.61 (117) 5.08 (129) 5.39 (137) 5.55 (141)

3.03 (77) 3.66 (93) 3.74 (95)

b

b

45

c1 c2 c3

(LAD-8)

Without cover or add-on blocks With cover, without add-on blocks with LADN or C (2 or 4 contacts)

Without cover or add-on blocks With cover, without add-on blocks with LADN or C (2 or 4 contacts)

c

c

CAD (Vdc Coil or Low Consumption Vdc Coil)

4.96 (126) 5.43 (138) 5.75 (146) 5.91 (150)

4.96 (126) 5.43 (138) 5.75 (146) 5.91 (150)

c1

c1

c2 with LA6DK10

c2 with LA6DK10

b

c3 with LADT, R, S

c3 with LADT, R, S

1.77 45

c

with LADT, R, S and sealing cover

with LADT, R, S and sealing cover

c1 c2 c3

With extended scale from 0.1 to 0.6 s.

[6]

[7] With switching time of 40 ms ± 15 ms between opening of the N.C. contact and closing of the N.O. contact. [8] Power should not be simultaneously applied or maintained to the mechanical latching block and the CAD relay. The duration of the control signal to the mechanical latching block and the CAD relay should be greater than or equal to 100 ms. [9] Complete the catalog number by adding the coil voltage code from Table 23.92. For example, LADK10 B .

23-88

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