ISEO 5517020 Electric oval-cylinder mortice lock with hold-open (Backset 70 mm)

Cylinder dimensions

Measure both sides from the fixing screw. Check the cylinder profile, cam and version.

Specifications

Construction

Electric oval-cylinder mortice lock with hold-open

Backset E

70 mm

Faceplate dimensions

160×20×3 mm

Lock-case height

76 mm

Key or cylinder interface

Oval cylinder

Latch function

Self-locking latch with independently loaded spring, With hold-open device

Rated power supply

12 V AC

Centre distance

47 mm

Faceplate material

Zinc-plated steel

Cutout and operation compatibility

This model has a 70 mm backset and 160×20×3 mm faceplate. Before replacing it, separately check the distance from faceplate to operating axis, the faceplate mortice and clearance for the 76 mm lock case. Door thickness cannot replace backset measurement.

The 551 configuration includes a hold-open device; confirm the door-management method permits this function. The rated power supply on this page is 12 V AC; do not directly apply AC/DC compatibility descriptions from other series.

Limitations

• Catalogue specifications do not establish compliance with site fire or escape door requirements; check against the specific door application.
• Confirm the included striking plates, rods, cylinder and power supply against the ordering configuration.

Sources

Manufacturer documents are provided in their original language.

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