SECO-LARM SD-231-ND1Q, SD-211-BD1Q User Manual

®

SD-231-ND1Q

Electro-Mechanical Latch

Manual

Features:

 12VDC, Fail-secure operation with

manual override

 Fully mechanical – can be unlocked if

power is lost

 Unlocks from outside with included keys

 Easy to install on existing gates/doors
 Compatible with access control devices
 Can be installed on left, right, in-swing, and

out-swing gates/doors

 2,250-lb (1,020kg) Static strength

SECO-LARM Electro-Mechanical Latch

2 SECO-LARM U.S.A., Inc.

The SD-231-ND1Q Electro-Mechanical Latch is designed for pedestrian gates or doors and can be
triggered by an access control system, by key from outside, or by manually turning the knob from
inside. It can be mounted on both in-swing and out-swing doors, and is also non-handed.

1x Lock body 1x Strike body 1x Key plate
1x Key guard 1x Cylinder lock 3x Keys
8x M5 Self-tapping screws 4x M3 Self-tapping screws

2x Long screws

2x Lock body cover screws 1x Mounting template 1x Manual

Operating voltage 12VDC

Current draw

Standby 0A@12VDC

Active 3A@12VDC Maximum
Static strength 2,250-lb (1,020kg)
Endurance 500,000 cycles (factory tested)
Operating temperature -40°~122° F (-40°~50° C)

Dimensions

Lock Body

5

1

/8"x315/16"x111/16" (130x100x43 mm)

Strike Body

1

7

/16"x315/16"x15/8" (36x100x41 mm)

Specifications:

Overview:

Introduction:

Parts List:

Long screws

Ke

y p

late

Key guard

Cylinder lock

Lock body
(cover removed)

M3 Self-tapping screw

M5 Self-tapping

screw

Sample Installation:

Door frame

Inside

Outside

Inside

Outside

Door frame Door

In-swing gate/door

Out-swing gate/door

Fig. 1

Door

NOTE: For in-swing gates/doors, mount the lock body on the door. For out-swing doors, mount the

lock body on the gate/door frame. Note the offset mounting so that the strike pin clears the
frame/gate when opening (see Fig. 1).