User guide
The table below gives a list of available I/O (Input/Output) boards, the number and type of 
connectors, and the number of slots used by any given board. For example, from the first 
row, the SMX 84 V is an 8x4 (8 inputs by 4 outputs) composite video board. It takes up one 
slot, and has BNC connectors.
Board Type I/O Connector
Board Names
Board Sizes (Slots Used) 
Composite 
Video 
BNC
SMX 84 V
8x4 (1)
SMX 88 V
8x8 (1)
SMX 1616 V
16x16 (2)
S-video BNC 
SMX 84 YC
8x4 (2)
SMX 88 YC
8x8 (2)
SMX 1616 YC
16x16 (4)
SDI and 
HD-SDI 
BNC
SMX 44 HD-SDI
4x4 (1)
SMX 84 HD-SDI
8x4 (1)
SMX 88 HD-SDI
8x8 (1)
SMX 1616 HD-SDI
16x16 (2)
Ultra 
Wideband
BNC 
SMX 84 WB
8x4 (1)
SMX 88 WB
8x8 (1)
SMX 1616 WB
16x16 (2)
Sync BNC 
SMX 88 
SYNC (H or V)
8x8 (1)
SMX 88 H+V
8x8 (2)
SMX 1616 
SYNC (H or V)
16x16 (2)
Stereo Audio
Captive 
screw
LR
SMX 84 A
8x4 (1)
SMX 88 A
8x8 (1)
SMX 1616 A
16x16 (2)
DVI
DVI-I  
(digital)
SMX 44 DVI
4x4 (1)
SMX 48 DVI
4x8 (2)
SMX 84 DVI
8x4 (2)
SMX 88 DVI
8x8 (2)
DVI-Pro 
SMX 44 
DVI Pro
4x4 (1)
SMX 48 
DVI Pro
4x8 (2)
SMX 84 
DVI Pro
8x4 (2)
SMX 88 
DVI Pro
8x8 (2)
S-video 
boards
mini DIN
SMX 84 SV
8x4 (1)
SMX 88 SV
8x8 (1)
SMX 1616 SV
16x16 (2)
HDMI HDMI
SMX 44 HDMI
4x4 (1)
SMX 48 HDMI
4x8 (2)
SMX 84 HDMI
8x4 (2)
SMX 88 HDMI
8x8 (2)
Wideband 
VGA 
15-pin HD
SMX 84 VGA
8x4 (2)
SMX 88 VGA
8x8 (2)
SMX 1616 VGA
16x16 (4)
Fiber optic 
(singlemode)
Optical 
(SFP)
SMX 88 
FOX 4G SM
8x8 (1)
SMX 1616 
4G SM
16x16 (2)
Fiber optic 
(multimode)
SMX 88 
FOX 4G MM
8x8 (1)
SMX 1616 
4G MM
16x16 (2)
USB
USB B input 
USB A 
output
SMX 44 USB
4x4 (1)
SMX 84 USB
8x4 (1)
The 2U frame has 4 single board slots, the 3U frame has 6 single board slots, the 4U 
frame has 8 slots, and the 5U frame has 10 slots. Each slot supports power and control 
connections to the I/O boards. When a board is installed into a slot it may use more than one 
slot. For example, the SMX 1616 VGA board uses four slots. The slots that a board covers 
are not available for other I/O board installation until that multi-slot board has been removed 
(see Installing the I/O Boards on page 10 for details).
NOTE:  To customize the SMX unit, use the SMX Configurator program, available at 
www.extron.com, or contact Extron Customer Support (see rear outer cover 
for contact numbers).
SMX System MultiMatrix Switcher • Introduction 2










