Sigma Di

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In-production 1997-1999 (LG Industrial Systems)
2000-2013 (Sigma/LG-OTIS/Otis Korea)		 Status Discontinued
Predecessor LG L/M/H series Successor Sigma Iris NV (now ACRA)
Sigma Iris 3

Overview

Di (Distributed Inverter) is a series of traction elevator models of South Korean elevator manufacturer Sigma, produced between 2000 and 2012. It was originally developed by LG Industrial Systems Elevator in the late 1990s and was released in 1997 as a successor of their previous L series (low speed), GoldStar M series (medium speed) and GoldStar H series (high speed) models. After Otis acquired LG Industrial Systems's elevator division in 1999-2000, it continued to be produced by LG-OTIS Elevator Company under the "LG-OTIS" trademark. For overseas markets, it was exported under the Sigma name. However, a handful of LG-OTIS branded elevators were also exported overseas.

It was the main product lineup of Sigma (and also LG-OTIS, later Otis in South Korea) that had been sold for more than 10 years. It was designed for low to high rise buildings. In 2013, it was discontinued when the Changwon factory was sold to LG Electronics and Otis Korea moved its production to China. As a successor, Sigma Iris NV and Iris 3 were released at the same time and are now produced in China.

Even after Sigma was established in 2000, some LG-OTIS branded Di elevators were also exported to Indonesia and other parts of Asia. However, these elevators were simply branded as LG on the car station; the LG-OTIS names are only seen in certain components that are not visible to the public, such as machine.

In Indonesia, these models were widely installed in various buildings from the 2000s until the early 2010s such as shopping centers, hotels, apartments, hospitals and occasionally universities.

Characteristics

  • Di elevators typically do not level quick, in other words, it would take few seconds before the doors open.
  • Almost all Di elevators have a button beep sound as a standard feature. Di1 elevators typically have short beep, while Di2, Ds4 and Di5 elevators have slightly longer beep.
  • The landing door keyhole is L-shaped.

Models

Di1

Released in 1997 at the time LG Industrial Systems was still in business, it is a low-end model of Di commonly used in low to mid rise buildings. It is a model that was widely installed in Indonesia throughout the 2000s until its discontinuation in 2013, so it is easy to find around the country. Di1 uses geared machine, and the speed range is between 1 and 1.75 meters per second. It is also a successor of LG's L series lineup for low rise buildings like LVP, etc.

Di2

Also released in 1997 and developed by LG Industrial Systems. It is a mainstream model of Di and basically a higher spec version of Di2. Usually found in larger shopping centers and some mid rise buildings like offices, apartments and hotels. Di2 is a successor of LG's M series lineup for mid rise buildings like MVP, etc. Like Di1, it uses geared machines.

DS-4

Released in 1997 and was initially known as Di4. It is a high end model of gearless high speed elevators for mid to high rise buildings, as well as a successor of LG's HVP-I/HGP models for high rise buildings. It is usually seen in high rise apartments in Jakarta.

Di5

Released in 1997, it was the flagship model of gearless high speed elevator for high rise buildings as well as a successor of LG's HVP-II models.

Quick specifications

  • Type: Traction, with machine room
  • Use: Passenger, service
  • Drive:
    • AC geared (Di1 and Di2) with VVVF
    • AC gearless (DS-4 and Di5) with VVVF
  • Control system: Sigma/Otis Korea SKA microprocessor
  • Capacity:
    • 450-1600 kg (Di1)
    • 900-1600 kg (Di2 and DS-4)
    • 1150-1600 kg (Di5)
  • Max. landings: ?
  • Max. travel height: ?
  • Speed
    • 1, 1.5, 1.75 m/sec (Di1)
    • 2 and 2.5 m/sec (Di2)
    • 2, 2.5, 3, 3.5, 4 m/sec (Di2 and DS-4)
    • 5, 6, 7 m/sec (Di5)
  • Max elevator car:
    • 4 (Di1 & Di2)
    • 8 (DS-4 & Di5)
  • Doors:
    • Single speed center opening
    • 2 speed telescopic sliding
  • Fixtures: No series name (refer to Fixtures section below for details)

Other Di based models

Bed elevators

This is basically the bed elevator version of Di for hospitals. There are some cases where the model was installed in high rise apartments or buildings other than hospitals as a service elevator. Almost all Sigma elevators installed in hospitals from the early 2000s until early 2010s are of this model. Some buildings such as apartments use these elevators as service elevators.

Di B'rite

This is a cost saving and lightweight version of Di1. It is a passenger only model designed for low rise buildings with 10 floors or less. The capacity is limited to just 750 kilograms, and various features and options are omitted. Buttons were made by third-party company and only segmented display was available for the floor indicators[1]. In South Korea, this model is known as SA1[2].

Fixtures

First generation (Early-mid 2000s)

The fixtures used in the first generation Sigma elevators are the same as the ones used in the LG-OTIS branded Di elevators. The standard button is silver rectangle with red illuminating letter and edges. There were also other types of buttons, such as round or square convex button with a letter that lights up red in the middle.

Floor indicators use seven segments display that lights up orange. Several variations of overhead floor indicator exist, and perhaps the most distinctive one is the display that is shaped like a speed bump (i.e. horizontal bar with a rounded top in the middle) or the rectangle display with a slanted part in the middle (which was originally a GoldStar design from the 1990s). For indicators on the car stations, they are just simple rectangle displays which are either horizontal or vertical. An LED dot matrix display was also available as an option but this is extremely rare.

Hall lanterns basically light up orange. There were many different variations available, but the most common ones are the round lanterns with or without a triangle arrow in the middle.

Almost all Sigma elevators have a button beep sound as a standard feature. The beep will sound when the a floor button is pressed. Di1 elevators typically have short beep, while Di2, Ds4 and Di5 elevators have slightly longer beep.

  • Round call buttons.

  • Round call button.

  • An oval shaped Sigma landing floor indicator.

  • Typical 2000s Sigma "speed bump" car floor indicator.

  • 2000s Sigma "speed bump" landing floor indicator with rare LED dot matrix display.

  • Early 2000s Sigma elevator car station with standard buttons.

  • 2000s LG-OTIS car station with standard buttons.

  • Sigma car station with round buttons and floor indicator.

  • 2000s Sigma car station with round buttons and rare LED dot matrix floor indicator.

  • 2000s Sigma car station with square buttons.

Second generation (Mid 2000s-early 2010s)

Standard fixtures

The fixtures used in the second generation Sigma elevators were redesigned. A new round stainless steel button with braille, orange illuminating letter and edges was introduced, and was widely used up until the 2010s. The silver rectangle buttons which were previously used in the first generation elevators remained available.

The floor indicators on the car stations have been redesigned with a vertical rectangle display but still retain the seven segments display, although it is now brighter than before. The capacity and alarm button is now attached under the floor indicator. Some elevators also use LED dot matrix display with scrolling arrows.

  • Sigma BTDC 1.jpg
  • Sigma BTDC 2.jpg

  • Typical newer Sigma car station.

  • Car floor indicator, capacity and alarm button.

  • Rectangle buttons

  • Typical newer Sigma hall station with floor indicator and rectangle button.

  • Standard landing floor indicator.

  • Interior of a newly installed Sigma elevator (taken in 2012).

  • Car floor indicator and capacity.

  • Round silver buttons.

  • Sigma floor indicator with LED dot matrix indicator.

  • A slightly different 2000s Sigma car station design.

MiniTouch

MiniTouch is a set of fixtures made of tempered glass with touch sensitive or micro click push buttons. The button panel has a small LCD screen which shows you the car position and selected floor(s). It also plays unique sound effects when the buttons are pressed or touched. Floor indicators are colored LCD displays. MiniTouch is Sigma's only fixtures lineup that has an official name.

As of 2023, the only known MiniTouch example in Indonesia can be seen at the Galaxy Hotel in Banjarmasin. There used to be another one at Menara Satu Kelapa Gading in Jakarta[3] but they were later replaced with conventional fixtures in the mid 2010s[4], presumably due to poor reliability and slow response.

  • Sigma MiniTouch floor indicator with the selected floors shown.

Notable installations in Indonesia

There are many Di installations in Indonesia. The following list only covers the well known ones.

To distinguish between those under the "Sigma" and "LG-OTIS" brand, the following list has been divided into two sections.

LG-OTIS elevators

Jakarta

  • Glodok Plaza (2000, replacement from unknown 1987 elevators)
  • Kemang Square
  • Kemang Point
  • Plaza Adorama Kemang (2000)
  • Jalan Raya Melawai No. 189
  • Gambir Station (replaced into Sigma ACRA in 2022)
  • Slipi Jaya Plaza (replacement from Dong Yang elevator)
  • Maspion Plaza
  • Cengkareng Public Regional Hospital

Other cities/provinces

  • Istana Plaza, Bandung
  • Java Mall, Semarang (modernized by LGS elevator)
  • Famous Kuta Hotel (formerly Aston Tuban Inn, and later Permata Kuta Hotel), Bali (2001)
  • Mercure Bali Kuta Beach, Bali (2001)

Sigma elevators

Jakarta

  • Podomoro City
    • Central Park Mall & Residences, Jakarta (2009)
    • Pullman Jakarta Central Park (2009)
    • Royal Mediterania Garden Residences, Jakarta
  • Mall Taman Anggrek (2011)
  • Tarumanegara University
  • Thamrin Residences (2008)
  • Senayan Trade Center (2002)
  • fX Sudirman (2006)
  • Plaza Semanggi & Veteran RI Building (2001)
  • Poins Square (2003)
  • Mall Kelapa Gading 3 (2002)
  • Mall Artha Gading (2004)
  • K-Link Building

Other cities/provinces

  • The Trans Luxury Hotel, Bandung
  • Royal Ambarrukmo Hotel, Yogyakarta (2010, replacement from unknown 1960s elevators)
  • Jogjatronik Mall, Yogyakarta (2004)
  • Pakuwon Trade Center, Surabaya (2001)
  • Lenmarc Mall, Surabaya (2010)
  • Kutabex Hotel & The Kuta Beach Heritage Hotel, Bali (2010)
  • Bali Nusa Dua Convention Center, Bali
  • Conrad Bali, Bali (2003)

Notes and references

  1. ↑ Sigma Di B'rite brochure (archived)
  2. ↑ (4K 엘리베이터 탑사기) 광주광역시 남구 봉선동 유정빌딩 OTIS엘리베이터 SA1 - YouTube
  3. ↑ (R) Sigma Traction Elevators at Menara Satu Sentra Kelapa Gading, Jakarta (Main, Retake 5) - YouTube
  4. ↑ Sigma DI2 Elevator with Different Chimes at Menara Satu Sentra Kelapa Gading, Jakarta - YouTube

External links and resources

Sigma elevator models
Models currently in-production PS: ACRA • ACRA 2.0 • Muse NV • Solon 2.0 • Solon Premium / Solon NV
HS: Iris 3
FR: FEC / FEI • FOVF (Otis)
Discontinued models
 PS: D'Brite • Distributed Inverter (Di1 & Di2) • EMRL1000 • Iris • Iris NV • MUSE • Solon (Standard / Comfort)
HS: Distributed Inverter (DS4 & Di5)
FR: -
Unidentified models
(models have no confirmed names) 		-
Destination dispatch e-route
Remarks (PS) Passenger model (traction with or without machine room / hydraulic) • (HS) High speed passenger model • (FR) Freight or heavy duty model
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