Products › Relays, closures & data › pREX
pREX
Programmable relay expander
A microprocessor relay expander that turns logic, closures or RS-232 commands into contact closures, with logic and timing you program.
$399 list price
Questions before you buy? Call 352-335-6555. Need help with one you own? Open a ticket.
What connects to it
- RS-232ProgrammingOr jumpers
- 4.5HoursLongest pulse stretch
- 50Pin connectorRJ-21 for 66 punch blocks
How it works
Any output can follow any input or group of inputs, combined with logic and shaped in time.
- InputsLogic, closures or RS-232
pREX
- AND, OR, XOR and more
- Momentary, toggle, edge or stretched pulses
- Contact closuresOn a 50-pin telco connector
pREX
Programmable relay expander
A microprocessor relay expander that turns logic, closures or RS-232 commands into contact closures, with logic and timing you program.
Questions before you buy? Call 352-335-6555. Need help with one you own? Open a ticket.
What connects to it
How it works
Any output can follow any input or group of inputs, combined with logic and shaped in time.
Inputs: Inputs (Logic, closures or RS-232). The pREX: AND, OR, XOR and more; Momentary, toggle, edge or stretched pulses. Outputs: Contact closures (On a 50-pin telco connector).
Features
- Each output can be triggered by any input or group of inputs
- AND, OR, XOR, NOR, NAND, NXOR and interlocked logic
- Momentary, toggled, leading or trailing edge, pulse stretching up to 4.5 hours, debounce, minimum and maximum on-time
- Program it with jumpers, any terminal program, or the free graphical configuration manager
- RS-232 control on the fly
- Outputs on a 50-pin SCSI (RJ-21) connector for standard telco punch blocks
More about the pREX
The Configuration Manager needs Microsoft .NET 1.1 installed first, even if you have a newer .NET. A second version runs without .NET but doesn't enable every function. On Windows versions after XP, run the installer as administrator.
Manual and downloads
- pREX manual (PDF)
- Configuration Manager (ZIP). Needs Microsoft .NET 1.1. Unzip into a new folder and run setup.exe from there.
- Configuration Manager without .NET (EXE). Not every function is enabled.
- Data sheet (PDF)
Every manual and download is also on the Support page.
Options
| Part | What it is | List price |
|---|---|---|
| CW PB-66 | Telco cable and punch block for the REX and pREX. | $155 |
| RM-01 | Rack mount for one unit. Name the product when you order. | $49 |
Goes well with
- REX: relay expander, $295 list
- Transcon-16: bidirectional contact closure transporter, $385 list