Spare Parts Leaflet

Door Operator, AT400

23-AAA24350BK
Engine Unit
September 18, 2024 / Page 1 of 11

OBSOLESCENCE NOTICE
The product listed in this SPL is obsolete. Some components may still be
available, but Otis recommends an upgrade (see TIP 32.2-1 for
potential upgrade).

SERVICE ENGINEERING
This document does not contain any Otis Elevator Company
technical data subject to EAR or ITAR Bloomfield, Connecticut USA
Unpublished Work—© Otis Elevator Co.; 2024
 23-AAA24350BK History

Leaflet Description
This leaflet provides spare parts information for the AT400 door operator. Only the lowest replaceable units
(LRU) for the engine unit/controller are covered here. LRU part numbers for center-open, single-slide, and two-
speed linkage apparatus are defined in separate SPLs.

Leaflet Revisions
Date Revised Subject Matter Expert Reason for Revision
April 5, 2002 Pankaj Kothari New SPL
Added new gate switch and update part numbers
October 28, 2003 Jeffrey A. Smith
pages: 4–6.
Inserted new page 4 w/AT400 operator engine unit p/ns;
September 21, 2006 Diem Tran
Updated kit contents descriptions in ref. 2 and 3 on p.6.
January 7, 2008 Diem Tran Added Motor Assembly page.
July 8, 2008 Brian Regan Added AAA24350BW vintage information.
December 22, 2010 Sohaib Shaikh Added AAA816AJ1 on page 12.
May 30, 2013 Brian Regan Removed AAA24350BW and made separate SPL
March 5, 2014 Brian Regan Removed Vintage AAA24350BW
Updated table format on pp. 5–6 to clarify parts ordering;
September 13, 2017 Brian Regan
Added clamp bolt and cover parts on p. 7
November 20, 2019 Peter Kelley Revised history page
September 18, 2024 Juan Murillo Added Obsolescence Notice.

Related Drawings
Drawing No. Title Drawing No. Title
Arrangement, AT400 Door Operator,
AAA24350BK AT400 Door Operator Assembly AAA24460G Two Speed Doors, 914.4 to 1371.6
Openings
Arrangement, AT400 Door Operator,
AAB24350BK AT400 Door Operator Assembly AAA24460M
Two Speed Doors
Arrangement, AT400 Door Arrangement, AT400 Door Operator
AAA24450T Operator, Single Slide Doors, AAA24470R Center Opening Doors, 914.4 to
914.4 to 1066.8 Openings 1219.2 Openings
Arrangement, AT400 Door Arrangement, AT400 Door Operator,
AAA24470X AAA24450AA
Operator, Center Opening Doors Single Slide Doors

This document does not contain any technical data subject to EAR or ITAR
Page 2 September 18, 2024 Unpublished Work—Otis Elevator Co., 2024
 History (Continued) 23-AAA24350BK

Related Documents
Document ID Title
SPL 23-AAA24470R AT400 (new equipment) Center-Opening Door Operator
SPL 23-AAA24470S AT400 (modernization) Center-Opening Door Operator
SPL 23-AAA24470X Door Operator AT400, S/S, C/O, 2/S, NG Door System
TIP 22.16-2 Driver and Idler Pulley Replacement Kits
TIP 22.16-5 Software Upgrade for AT400 (OMMS task 12V1S)
CI 16-07-029 AT400 Door Operator Software Update

Subject Matter Expert

Name Department

Peter Kelley OSC Service Engineering

About Spare Parts Leaflets…

This document lists the lowest replaceable units (LRUs) for the standard version of the product. The LRUs
are chosen by a team of Otis associates representing engineering and manufacturing.
While goal of this document is to make parts identification as easy as possible, the document cannot be all-
inclusive. Elevator and escalator contracts classified as “special” or “custom” are not addressed here. For
such contracts, please refer to specified information, the contract folder, TIPs, Field Education Articles,
Construction Letters, etc. for further information.
If you have any suggestions about this document, please contact the subject matter expert listed on this
page.

This document does not contain any technical data subject to EAR or ITAR
Unpublished Work—Otis Elevator Co., 2024
September 18, 2024 Page 3
 23-AAA24350BK Door Operator Linkage Assemblies

Door Operator Linkage SPLs

Linkage Assembly, AT400 Door Operator Center-Opening Doors
Linkage Assembly, AT400 Door Operator Single-Slide Door
SPL 23-AAA24470R
Linkage Assembly, AT400 Door Operator Two-Speed Doors

This document does not contain any technical data subject to EAR or ITAR
Page 4 September 18, 2024 Unpublished Work—Otis Elevator Co., 2024
 AT400 Operator 23-AAA24350BK

Type AAB24350BK Engine Unit

AAA24350BK OPENING
AAB24350BK WIDTH
REF. OPERATOR DOOR
APPLICATION PART No. DOOR TYPE MIN MAX
No. LENGTH HAND
2SP & 1SP Side Slide 48 60
AAB24350BK5
76.4 in. (1940 mm) C/O – aircord related 49 60
ACA24350BW56
C/O – belt related 42 53
2SP & 1SP Side Slide 48 60
AAB24350BK10
76.4 in. (1940 mm) C/O – aircord related 49 60
ACA24350BW57
C/O – belt related 42 53
2SP & 1SP Side Slide 42 47
Otis Serial Link AAB24350BK34
64.4 in. (1635 mm) C/O – aircord related 41 48
(Multidrop) ACA24350BW58
Controller C/O – belt related - 41
Communication 2SP & 1SP Side Slide 42 47
1 such as Elevonic® AAB24350BK20
64.4 in. (1635 mm) C/O – aircord related 41 48
R, Gen2®, 411, ACA24350BW59
335, GCSM, C/O – belt related - 41
RSVF, RSDC, and AAB24350BK38 2SP & 1SP Side Slide 33 41
GEM Systems AAB24350BK44 59.4 in. (1509 mm)
ACA24350BW60 C/O – aircord related 33 40

AAB24350BK39 2SP & 1SP Side Slide 33 41

59.4 in. (1509 mm)
ACA24350BW61 C/O – aircord related 33 40
AAB24350BK41 2SP & 1SP Side Slide - 32
52.9 in. (1343 mm)
ACA24350BW62 C/O – aircord related - 32
AAB24350BK43 2SP & 1SP Side Slide - 32
52.9 in. (1343 mm)
ACA24350BW63 C/O – aircord related - 32

* For replacing anything other than the existing AT400 engine units, see TIP 22.16-1, 7300AC,
A7777 (PWM), 7777 Resistance Control to AT400 Door Operator Retrofit Kit with Existing Otis
Controller.
(Continued on next page)

This document does not contain any technical data subject to EAR or ITAR
Unpublished Work—Otis Elevator Co., 2024
September 18, 2024 Page 5
 23-AAA24350BK AT400 Operator
Type AAB24350BK Engine Unit

AAA24350BK OPENING
AAB24350BK WIDTH
REF. OPERATOR DOOR
APPLICATION PART No. DOOR TYPE MIN MAX
No. LENGTH HAND
2SP & 1SP Side Slide 48 60
AAB24350BK45
76.4 in. (1940 mm) C/O – aircord related 49 60
ACA24350BW45
C/O – belt related 42 53
2SP & 1SP Side Slide 48 60
AAB24350BK46
76.4 in. (1940 mm) C/O – aircord related 49 60
ACA24350BW46
C/O – belt related 42 53
2SP & 1SP Side Slide 42 47
AAB24350BK47
Discrete Controller 64.4 in. (1635 mm) C/O – aircord related 41 48
ACA24350BW47
Communication C/O – belt related - 41
such as 211, 2SP & 1SP Side Slide 42 47
1 LRVF, Hydro AAB24350BK48
Accel, Relay 64.4 in. (1635 mm) C/O – aircord related 41 48
ACA24350BW48
Logic, and non- C/O – belt related - 41
Otis Systems 2SP & 1SP Side Slide 33 41
AAB24350BK49
59.4 in. (1509 mm)
ACA24350BW49 C/O – aircord related 33 40
AAB24350BK50 2SP & 1SP Side Slide 33 41
59.4 in. (1509 mm)
ACA24350BW50 C/O – aircord related 33 40
AAB24350BK51 2SP & 1SP Side Slide - 32
52.9 in. (1343 mm)
ACA24350BW51 C/O – aircord related - 32
AAB24350BK52 2SP & 1SP Side Slide - 32
52.9 in. (1343 mm)
AACA24350BW52 C/O – aircord related - 32
* For replacing anything other than the existing AT400 engine units, see TIP 22.16-1, 7300AC,
A7777 (PWM), 7777 Resistance Control to AT400 Door Operator Retrofit Kit with Existing Otis
Controller.

This document does not contain any technical data subject to EAR or ITAR
Page 6 September 18, 2024 Unpublished Work—Otis Elevator Co., 2024
 Operator Engine Components 23-AAA24350BK

AAA24350BK
AAB24350BK
REF. No. PART No. DESCRIPTION
1 --- Assembly, Gear Motor, See Page 13
Belt, Relating, w/Two-Speed (48 in. & 54 in. or 1219 mm & 1372 mm),
AAA717T2
Single-Slide (54 in. or 1372 mm), C/O (60 in. or 1524 mm) Doors
Belt, Relating, w/Two-Speed (36 in. & 42 in. or 914 mm & 1067 mm),
AAA717T3 Single-Slide (32 in., 36 in., & 42 in. or 813 mm, 914 mm, & 1067 mm),
2 and C/O (48 in. or 1219 mm) Doors
Belt, Relating, w/Two-Speed (36 in. or 914 mm), C/O (32 in. & 36 in. or
AAA717T4
813 mm & 914 mm), and Single-Slide (36 in. or 914 mm) Doors
Belt, Relating, w/Two-Speed (32 in. or 813 mm), and Single-Slide (32
AAA717T5
in. or 813 mm) Doors
3 NON1241M6X16-8-8B Bolt, Clamp
4 AAA386LQC1 Clamp
AAA346BAT1
5 Cover
AAA346BAT2
AAA346BAG1 Cover, L = 75.6 in. or 1920 mm
AAA346BAG2 Cover, L = 63.6 in. or 1615 mm
6
AAA346BAG3 Cover, L = 58.6 in. or 1489 mm
AAA346BAG4 Cover, L = 52.1 in. or 1323 mm
7 AAA384AHJ1 Guard
8 AAA392CJ1 Hitch
(Continued on next page)
This document does not contain any technical data subject to EAR or ITAR
Unpublished Work—Otis Elevator Co., 2024
September 18, 2024 Page 7
 23-AAA24350BK Operator Engine Components

AAA24350BK
AAB24350BK

REF. No. PART No. DESCRIPTION

1 AAA25580AL2 Control Unit (AC Power Supply, Discrete I/O)
AAA25580AL3 Control Unit (DC Power Supply, Discrete I/O)
AAA25580AL4 Control Unit (AC Power Supply, Multi-Drop)

2 AAA198BF501 Kit, Idler Pulley Replacement, TIP 22.16-2

Kit Contains: (1) Pin, (1) Idler Pulley, (1) M8 x 40 Hex Bolt, (1) Washer
3 AAA90EW1 Spring, Compression
AAA621BF2 Power Supply, 110 V
4
AAA621BF3 Power Supply, 230 V
5 --- Switch, Gate ( p. 12)

This document does not contain any technical data subject to EAR or ITAR
Page 8 September 18, 2024 Unpublished Work—Otis Elevator Co., 2024
 Operator Engine Components 23-AAA24350BK

AAA24350BK
AAB24350BK

REF. No. PART No. DESCRIPTION

1 AAA816AJ1 Kit, Programmed EPROM, NOTE
NOTE: This kit is for earlier versions of the EPROM-based AT400 controllers that have software
version prior to V3.31 (refer to CI 16-07-029 or TIP 22.16-5). These controllers cannot be
updated using the PDA and the chip must be replaced using this kit.

This document does not contain any technical data subject to EAR or ITAR
Unpublished Work—Otis Elevator Co., 2024
September 18, 2024 Page 9
 23-AAA24350BK Gear Motor Assembly

VINTAGE
AAA24350BK
AAB24350BK
New
New
Installation
Installation
prior to
after 03/07
03/07
REF. No. PART No. DESCRIPTION HAND
AAA24350BL1 --- RH
1
AAA24350BL2 --- Assembly, Gear Motor and Sheave, LH
AAA24350BL5 See NOTE
--- RH
AAA24350BL1
2
AAA24350BL6
--- LH
AAA24350BL2
Kit, Drive Pulley Replacement,
TIP 22.16-2
3 AAA198BF500 --- Kit Contains: (1) Driver Pulley, (1) Key, (1) ---
Retaining Ring, (1) Loctite® Retainer, (1)
Alcohol Wipes, (1) Scotch-Brite®, Fine Duty
NOTE: Drive sheave used in gear motor assembly installed after 03/07 cannot be replaced. Field
needs to order gear motor assembly type AAA24350BL (ref. 1 and 2). The drive
replacement kit (ref. 3) can be used to replace the drive pulley after the initial replacement
of gear motor assembly

This document does not contain any technical data subject to EAR or ITAR
Page 10 September 18, 2024 Unpublished Work—Otis Elevator Co., 2024
 Gate Switch 23-AAA24350BK

AAA24350BK AAB24350BK
REF. NO. PART or ML DESCRIPTION
Assembly, Gate Switch
AAA25590T1 ---
1 (for Hydraulic/Modernization Units)
AAA25590T2 --- Assembly, Gate Switch (for Gen2® R2 NAA)
2 AAA25590W1 Assembly, Gate Switch
3 AAA661B6 Shunt
AAA661B8
AAA661B8
4 AAA661B101 Switch
5 AAA24431B1 Switch, Proximity

This document does not contain any technical data subject to EAR or ITAR
Unpublished Work—Otis Elevator Co., 2024
September 18, 2024 Page 11