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1. APPLICATION

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LB-85.4 

is a normally-opened electromechanical mortise door lock 

(hereinafter – the lock), designed to be used as an operating device as a part 

of access control system (hereinafter – ACS) to control light and medium 

office doors.
Lock features:

•  the lock has installed in wooden and non-metallic doors 38-50 mm thick;

•  the lock has a unique construction, allowing to connect lock control cable 

through the strike plate in the door frame, not through the door leaf, which 

makes installation easier;

•  when connecting to "PERCo" ACS controllers, operation of the lock can be 

maintained without using a door sensor (reed switch), the contact group of 

the lock is used instead;

•  automatic orientation of the contact group relatively of the locking bolt, 

implemented through the use of neodymium magnets, can significantly 

increase the tolerances during installation and the reliability of the lock;

•  the lock design allows you to use almost all types of lever handles that are 

on the market;

•  the lock is designed for use with standard lock cylinders;

•  a universal lock construction enables its installation on both right-handed 

and left-handed doors;

•  in the absence of supply voltage, the lock is not locked;

•  with voltage applied the lock closes automatically at shutting the door;

•  with voltage applied the lock can be open with the key;

•  forend plate, strike plate and locking bolt made of stainless steel; details 

and lock body have corrosion-resistant coating;

•  the lock is resistant to self-opening (for instance, as result of a hard kick on 

the door);

• the design of the lock does not require preventive maintenance and 

lubrication from the customer for the entire period of operation;

•  the lock has low power consumption (max 2 W).

The lock with regard to resistance to environmental exposure complies with 

GOST 15150-69, category NF4 (operation in premises with climate control).
Operation of the lock is allowed at ambient air temperature from +1°C to 

+40°C and at relative air humidity of 75% at+15°C.

The universal construction provides use of standard pin-type lock cylinders, standard 

 

EuroDIN (V DIN 18254), e.g. type 8809, 8209 produced by company ISEO (Italy), 

or 

lock cylinders of D series by Wilco Supply (type

 254 – 274 – 294, 453, 454, 554) .

2

The lock cylinder with a set of keys, door levers with fixing elements, reed switch, 

control and reed switch cables are not included in the delivery set.

A2

IN

NO

C

NC

+12V

VD1

Terminal block

Lock

magnet

S1

A1

A3

A4

Contact  1

Contact  2

1
2

Contact 1
Contact 2

1

2

ACS controller

IN

GND

OUT

+U

GND

+12V

+U

GND

The lock has a marking in the form of label located on its housing. Label 

containts product name, its serial number, the manufacture date and its main 

technical specifications.The product is packed in an carton box, protecting it 

from being damaged during transportation and storage. 
Box dimensions  (L× W× H) ....................................................... 22×12×4 cm

Gross weight  .............................................................................. max. 0.9 kg
Lock storage is allowed indoors at ambient air temperature from -50°C to 

+50°C and at relative air humidity of 75% at+15°C. Storage time in closed 

package is 12 months. 
During storage and transportation carrying cases containing boxes with locks 

can be stacked no more than 2 layers high.
The lock in the original package can be delivered by means of land (railway 

and road), sea and air transport. It is allowed to stack the boxes while in 

transit.

2. 

TECHNICAL SPECIFICATIONS

Attention

!

Due to continuous improvement of products the Manufacturer reserves 

the right to modify, without notice, the product design not aggravating its 

technical specifications.

 DC voltage ......................................................................................... 11 - 13V
 Operational current ..................................................................... 0.08 - 0.12A
 Power consumption .......................................................................... max. 2W
 Type (fail-safe performance) .............................................. normally-opened
 Bolt throw ......................................................................... not less than 15 mm
 Centre-to-centre spacing .................................................................... 85 mm
 Backset (dornmass)

 

............................................................................. 45 mm

 The size of the square-hole for the lever rod ........................................... 8 mm

 Dimensions ............................................................................ 94×22×187 mm
 Weight ............................................................................ not more than 0.5 kg
 Lock type ............................................................................................ cylinder
 Resistance to opening

 ................................................................ І (EN 12209)

 Electric shock protection class ................................................ III (IEC 61140)
 MTBF 

 

............................................................. 200 000 number of operations

 Average lifetime................................................................................... 8 years

Design and composition of the lock are shown in Fig. 1

1

Attention!

3. STANDARD DELIVERY SET

Check the delivery set upon product receipt.

Lock  ............................................................................................................ 1
Strike plate ................................................................................................. 1 
Terminal block ............................................................................................ 1 

Lock cylinder fastening screw

 

 

M5×50 DIN965 .

........................................... 1

Screw 3×6 DIN965

 

...................................................................................... 2

Screw 3.9×25 DIN7982 ............................................................................... 4
Mounting stud ............................................................................................... 5
Certificate and operation manual ................................................................. 1
Installation template 

 

.................................................................................. 1

Package box ................................................................................................ 1

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Fig.1.  LB-85.4 electromechanical lock design

Fig. 3.  LB-85.4 electromechanical lock layout

1- Lever 

3

;  2 - Key

3

;  3 - Escutcheon plate fastening screw

3

4 - Escutcheon plate

3

;  5 - Lever rod

3

;

6 - Lock cylinder

3

;  7 - Lock;  8 - Screw 3.9×25; 

9 - Strike plate;  10 - Terminal block;  11 - Terminal cables; 

12 - Locking mechanism lever;  13 - Locking bolt;  14 - Forend plate; 

15 - Lock cylinder fastening screw M5×50; 16 - Mounting studs

1
2

A1

12V; 0.5А; 6W

A2
A3

А4

S1

15–18 V (BZW06-15B, P6KE16CA

VD1

Fig. 2.  Electromechanical lock installation layout

Position

Unit

Note

Control cable of the ACS controller 
Reed switch cable
Power supply unit
Lock controller
Terminal block

Reed switch

Suppressor

Lock

3

Not included in the delivery set

WARRANTY CARD

WARRANTY REPAIR COUPON

Cutting line

Cutting line

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

A

A

B

B

B-B

A-A

C

C

C-C

Ø3.5×30

2 holes

3

25

85

113

130

2

35°

31

L 2

±1 

 

27 

±3

3

45

2

2

R3

36

4

12

13

R6

27

87

42

23

85

21

2 holes 

Ø7

Ø20

2 holes

Ø3.5×30

147

22

18

165

R11

L=38...50

L- door thickness 

38

Ø7

L 2

±1 

+2,7

–2

Ø12±4

R9

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