Code Activated Switch

Product Picture
  • Four or eight ports
  • Serial or parallel
  • Configuration menu functions
  • Broadcast mode
  • 64K buffer expandable to 256K


Porter is a versatile, code activated switch that allows one computer to send a code to select one of several devices. Porter can be configured to match the type of equipment already installed. A PC is not required to use the switch or configure it.

Porter is simple to install and uses common cables that work with any device with serial or parallel ports. Porter's serial ports are DB25 and its parallel ports are Centronics.

Receiver buffers accept data on all ports simultaneously. This data can be individually read from the master port. Porter transmits from buffers on all ports concurrently. Porter's buffer is expandable to 256k bytes. The 'clear buffer' command purges all data in a port's buffer. The broadcast feature allows data to be sent on all ports.

These are only a few of the features that make Porter one of the best code activated switches on the market. Call us today about your code-activated switch application.


Dimensions (W x D x H) 10.5" x 5" x 3.9" (267 x 127 x 99 mm)
Weight 8 lb (3.6 kg)
Power 90-240 VAC 50-60Hz External adapter, 17 VAC CT, 700 ma 10W
Distance RS232: 100 feet (30m)Parallel: 25 feet (7.6m)
Connectors Serial: DB25FParallel: Centronics 36FPower: DIN5
Controls Unit power: Green LEDPort select: Red LED per portStatus: Red LEDs Mode, Data, Busy, ErrorLED control: Advance/select push-buttons
Environment Operating temperature: 32°F–131°F (0°C–55°C)Storage temperature: -13°F–140°F (-25°C–60°C)Relative humidity: 5%–80%, non-condensing


PO-4SSerial: 1 In to 4 Out, DB25F, RS422 Optional
PO-4PParallel: 1 In to 4 Out, Centronics 36F
PO-8SSerial: 1 In to 8 Out, DB25F, RS422 Optional
PO-8PParallel: 1 In to 8 Out, Centronics 36F
Serial cables
CAB-ATRSnnnCable, PC to Switch, DB9F to DB25M
CAB-PCRSnnnCable, PC to Switch, DB25F to DB25M
CAB-PRSnnnCable, Serial Printer to Switch, DB25M to DB25M
Parallel cables
CAB-IBMPnnnCable, PC to Switch Parallel Cable, DB25M-Centronics C36M
CAB-PMMnnnCable, Switch to Printer Parallel Cable, Centronics C36 (M-M)
CAB-IBMPnnn/SCSuperCable, PC to Switch Extended Distance Parallel Cable, DB25M-Centronics C36M
CAB-SMMnnn/SCSuperCable, PC to Switch Extended Distance Parallel Cable, DB25 (M-M)
RM-MP/xxRack Mount kit, 3U Chassis, (xx = 19", 23", or 24")
nnn = cable length in feet


Datasheet • Porter PDF
Quick Start • PorterPDF
Manual • Porter • Installation and Operation PDF