SDI2

The SDI2 terminals on a B-Series panel (top quick connect, bottom hardwired terminals)

The SDI2 terminals on a G-Series panel (top hardwired terminals, bottom hardwired terminals) the bottom set of terminals below the red box can be programmed for legacy SDI for use for older style Bosch keypads (such as the D1255 and D1260), or as another SDI2 bus.

The SDI2 terminals on a GV4 series panel (top hardwired terminals, bottom quick connect). The GV4 panels do have an SDI2 bus unlike the older 7000/9000 series panels.

The SDI2 Bus is a addressable bus on modern Bosch panels which connects to system components, such as keypads, zone/output expanders, communicators, and wireless receivers. Each device is addressed with an address wheel. (Similar to System Sensor's address and AV selections) And every device type uses it's own address's. So for example, if you have 4 keypads and 3 wireless receivers, you will address the keypads 1-4, and the wireless receiver's 1-3 on the wheel, the system can tell the difference between the different device types. It's important to know that for some devices, the address wheel is sometimes used not for addressing the device but for selecting what kind of mode the unit will be in. SDI2 devices can be connected either hardwired directly into the SDI2 terminals, or with quick connecters, either with quick connect wires to connect in panel modules, or quick connectors and wire nuts.

List of SDI2 compatible panels

• B9512G
• B8512G
• B6512
• B5512
• B4512
• B3512
• D9412GV4
• D7412GV4
• D7212GV4
• Bosch Solution 2000
• Bosch Solution 3000

  

  The SDI2 terminals on a Bosch Solution 2000/3000 panel (top quick connect, bottom hardwired terminals)

List of SDI2 compatible components

Not all SDI2 panels work with all SDI2 components, check the panels compatibility listings for details.

Keypads

• B915 basic alpha-numeric keypad
• B92x 2 line alpha numeric keypads
  • B920
  • B921C capacitive touch with 4 onboard points
  • B925F fire/burg keypad
  • B926F fire keypad
• B930 "ATM style"
• B94x touch screen keypads
  • B940W slim touch screen keypad
  • B942 touch screen keypad with built in card reader and 8 point inputs
• IUI-SOL-ICON Basic icon keypad for solution 2000/3000
• IUI-SOL-TEXT Text keypad for solution 2000/3000 (similar to B915)
• IUI-SOL-TSX Newer touch screen keypads for solution 2000/3000
  • IUI-SOL-TS5 5" touch screen (similar to B940W)
  • IUI-SOL-TS7 7" touch screen
• IUI-SOL-T4M Older touch screen keypads for Solution 2000/3000
• IUI-SOL-TS4 Another older touch screen keypad for the Solution 2000/3000 (similar to B942)

Wireless Receivers

• B810 RADION receiver
• B820 Inovonics Interface Module

Expansion boards (input/output)

• B208 octo-input
• B308 octo-output
• B520 Aux Power Supply

• B600 ZONEX retrofit board (for replacing older panels with a ZONEX bus with G-series panels)
• B299 POPEX module
• B901 Access Control Card

Communicators

• B450 Cellular
• B426 Ethernet

Diagnosing faults with SDI2

R/PWR is Power Positive, Y is Data Positive, G is Data Negative, B/Com is Power Negative

The data voltage on a healthy SDI2 bus should be fluctuating between 6VDC-8VDC.

The power voltage on the SDI2 bus should be the exact same as the AUX power (normally 13.79VDC-13.80VDC)

If you notice an SDI2 keypad is making a weird buzzing noise and is blank, this could be caused by a common wire being disconnected.