New Products, Specials and Product News

Papers and articles

The Switch as a Simple Machine (pdf paper)

A short article proposing that the switch be added to the list of simple machines. Basically just an arguement that the switch is just as important as the lever, inclined plane, pully or screw. Since our world in now dominated by switches, it seems like the simple machine list is due for an update. Really just for entertainment because we like switches a lot.

The History of Switching Systems (pdf paper)

The first chapter of a book on switching systems. Covers the evolution of the programmable switching systems from ancient irrigation to modern automated telemetry switches. It covers telephone switch boards, traffic control, automated test, data acquisition and advanced communication switches. Sections on control interfaces such as TTL, RS232, GPIB, LAN and USB. Sections on switches run from computer buses such as STD80 ( Standard Bus or Simple to Design Bus), VME, VXI, PCI and PXI. While it is all in relation to applications for switching systems, it contains historical references that may be interesting to anyone involved in the fields of automated test, data acquisition and communications.

Model 7721 Line Length Switch

Product Details ( pdf Bulletin )

These Chassis controls up to 30 2x2 modules with 2 to 8 wires per module for building line length simulations. Modules have CAT6A RJ45 connectors and use the EIA568 pin-out to comply with any ethernet standard up to 10GbaseT. Can also be used for any DSL up to GFast. Modules can be driven in parallel to test cables with up to 24 pairs. LEDs on the front panel show switch and power status. Custom systems and configuration readily available. Call or e-mail for more information.

Dimensions:
19" Rack Mount (483 mm)
15" deep (381 mm)
10.5" (6 RU) high (267 mm)
Weight: 25 lbs (12 Kg) max
AC Power : 75 Watts max. 110/220 selectable.

DC to 700 MHz bandpass, 100 ohm pairs
-65 dB of crosstalk isolation @ 225 MHz for 4 wire ( 2 Pair ) modules. 2x2 Switch Modules.
CAT6A RJ45 connectors
LAN, GPIB, USB, RS232 or Manual Control
Mechanical relay solutions act exactly like a piece of cable.
Custom systems and configurations

7734 8 Channel Power Switch w/ current monitoring

Product Details ( pdf Bulletin )

This system controls up to 8 AC Power lines and monitors the current flow for each line. LEDs on the front panel show switch status. Remote status for monitoring current from LAN, RS232 or GPIB. A pushbutton manual control is optional.

Dimensions:
19" Rack Mount (483 mm)
15" deep (381 mm)
3.5" (2 RU) high (90 mm)
Weight: 15 to 20 lbs (7 to 9 Kg) max
AC Power : 50 Watts max. 110/220 selectable.

Hot switches power up to 8 amps.
Color coded 3 way binding post connectors.
Current ranges from 0 to 200 ma, up to 0 to 15 amps.
LAN, GPIB, USB, RS232 or Manual Control
Custom systems and configurations