Page 564 - Motor_protection_and_control_Manual_motor_starters_ contactors

Mechanical latching unit

Description
The WA4 mechanical latching unit for AF09 ... AF96 contactors and NF contactor relays ensures that the
contactor or contactor relay remains switched on even if there is a lack or a failure of voltage. Standard con-
tactors can be easily converted into compact latched contactors.
The WA4 block contains a mechanical latching device with electromagnetic impulse unlatching (AC or DC) or
1SBC101058V0014 manual unlatching.
Operation
WA4 After closing, the contactor continues to be held in the closed position by the latching mechanism should the
supply voltage fail at the contactor coil terminals.
Contactor opening can be controlled:
– electrically by an impulse (AC or DC) on the WA4 block coil (the coil is not designed to be permanently
energized)
– manually by pressing the pushbutton on the front face of the WA4 block.
Mounting
The WA4 block is clipped onto the front face of the 1-stack contactor where it takes up two slots in central
position (see fig. below).
The two other slots may accept CA4 single pole auxiliary contacts (1 block on each side of the mechanical
E1
latch).
Additional CAL4 can be fitted on the side of the contactor in respect to the total number of built-in or
A1 E2
additional N.O. and N.C. auxiliary contacts as described in the accessory fitting details part of each
contactor type.
A2
Wiring diagram Ordering details
For contactors and Rated control circuit Type Order code Pkg Weight
contactor relays voltage Uc qty (1 pce)
V AC 50/60 Hz V DC kg
AF09 ... AF65, NF 1-stack 24...60 24...60 WA4-11 1SBN040100R1011 1 0.080
48...130 48...130 WA4-12 1SBN040100R1012 1 0.080
100...250 100...250 WA4-13 1SBN040100R1013 1 0.080
250...500 250...500 WA4-14 1SBN040100R1014 1 0.080
AF80, AF96 24...60 24...60 WA4-96-11 1SBN040200R1011 1 0.080
48...130 48...130 WA4-96-12 1SBN040200R1012 1 0.080
100...250 100...250 WA4-96-13 1SBN040200R1013 1 0.080
250...500 250...500 WA4-96-14 1SBN040200R1014 1 0.080
Mechanical latching unit for 24 V DC - 500 mA PLC control
AF09 ... AF38, NF 1-stack – 24 WA4-10 1SBN040100R1010 1 0.080

Main dimensions mm, inches
B
10 For contactors and A B
0.39" contactor relays mm in. mm in.
AF09 ... 16(Z)-30-.. 45 1.77" 133.5 5.25"
AF09 ... 16(Z)-40/22-00
NF(Z)
AF26 ... 38(Z)-30-00 45 1.77" 142.5 5.61"
41
1.61" AF26 ... 38(Z)-40/22-00 45 1.77" 157.5 1.77"
AF40 ... 65-30-00 55 2.16" 167 6.57"
AF40-40/22-00 70 2.75" 170 6.70"
3 AF52-40-00 70 2.75" 170 6.70"
0.12"
60 2.36" AF80, 96-30-00 70 2.75" 172 6.77"
A 5.5 0.22" AF80-40/22-00 90 3.54" 172 6.77" 1SBC100204S0201
WA4 + AF09 ... AF96, NF 1-stack

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