BTC 8120

BTC 8120

FCC ID	E5XKBP10910U
Manufacturer	BTC
Features	Erase-Eaze, tenting
Layouts	Modified ISO, modified Focus layout
Keyswitches	BTC dome with slider
Dimensions	500 × 245 × 41 mm
Weight	1214 g (example 1) 1265 g (example 2)

8120 is a model of ergonomic keyboard from BTC with BTC dome with slider switches.

Description

BTC 8120 is a split-body ergonomic keyboard: the two sides snap together, and can be pulled apart to allow them to be positioned and angled separately. Each side has two dual-height feet with screw-out posts at the rear and two screw-out feet at the front to provide tenting in a variety of angles, including both front-to-back and sideways negative tilt on each side. The keyboard case is shaped so that the bottom parts serve as built-in wrist rests on each side.

An integrated cable with 25 or 26 conductors connects the matrix wiring and the electromagnetic shielding on each side. This cable terminates internally in each side with two plugs, one 15-way and one 10-way; the 15-way plug is fully populated, while the 10-way plug may only use nine of the positions (this is not clear from the photographs). The grounding conductor is separate.

The layout is non-standard, and is based (depending on target locale) on ISO and the Focus layout. Most of the navigation cluster is moved to the top above and to right of the function keys, but arrow keys are brought in closer and duplicated on the left-hand side. The space bar is split, providing Erase-Eaze: the left side of the space bar functions as backspace. The label cites US patent 5143462, for Erase-Eaze.

Both examples below use BTC dome with slider switches; the second example is demonstrated to use a PCB. The 8210 specification sheet posted to the BTC website cites the "switch activation mechanism" as "Membrane", which could either be plain rubber dome as in the BTC 8110M, or it could be the membrane version of BTC dome with slider. A limited amount of thin foil appears to offer some kind of electromagnetic shielding.

The manual below gives the tactile force as 60±20 g, while the specification sheet online gives 55±20 g.

Gallery

Example 1

Example with FCC ID.

• 
  Top
• 
  Back with extended flip-feet
• 
  Label with FCC ID
• 
  BTC dome with slider
• 
  Adjustable flip-foot
• 
  Keyboard box

Manual

• 
  Manual cover
• 
  Introduction
• 
  Contents
• 
  Recommended Guides at Work
• 
  Erase-Eaze™ Feature & Installation
• 
  Technical Specifications

Example 2

This example is from 1996, and does not provide an FCC ID.

• 
  Top
• 
  Angled
• 
  Split
• 
  Bottom
• 
  Rear label
• 
  Keycap detail
• 
  Left-hand top cover
• 
  Right-hand top cover
• 
  Internals
• 
  Left-hand dome sheets
• 
  Right-hand dome sheets; note the alternative material for the numeric keypad
• 
  Left-hand (primary) PCB with foil
• 
  Left-hand PCB, dated 9638; the controller is dated 9611
• 
  Right-hand (secondary) PCB with foil
• 
  Right-hand PCB, dated 9638
• 
  Sliders

See also

• BTC 8110M — non-split model with membrane switches

External links

• BTC — BTC 8120 (specification sheet)
• KBtalKing — ⊙c⊙BTC-8120導電橡膠分離式人體工學鍵盤⊙c⊙