Didactum PDU 4T
€599.00
Switchable Power Distribution with Gigabit Ethernet and Environmental Monitoring
The Didactum PDU-4T is a versatile, network-enabled Power Distribution Unit for effective load management in server rooms and technical cabinets. It allows up to four individual sockets to be switched on and off or remotely rebooted, giving flexible control over connected devices such as servers, network equipment, or peripheral devices.
As one of the few switchable PDUs with true Gigabit Ethernet (10/100/1000 Mbit/s), the PDU-4T is especially suitable for environments where high-performance network connectivity is required. In addition, it functions as a full-featured I/O controller: analog sensor ports, a CAN bus for digital sensors, dry contacts, and 12V relay outputs make it possible to centrally manage door control, fans, generators, UPS systems, circuit breakers, and alarm systems.
With the ability to manage up to 700 elements — including notifications, triggers, timers, logic schemes, sensors, and dry contacts — the PDU-4T offers robust functionality even for complex setups, controlled through an intuitive integrated web interface.
Four outlets, individually remotely controllable
Each of the four C13 outlets (110–240V AC, 50/60 Hz, bistable relays) can be switched on and off or rebooted independently of the others.
On / Off
Each outlet can be switched manually or automatically via a logic scheme.
Remote reboot
Unresponsive devices can be brought back online remotely by rebooting them.
Bistable relays
The last switched state of each outlet is retained even during a brief power outage.
Logic schemes
Switching actions can be linked to conditions such as sensor values or schedules.
Gigabit Ethernet for high-performance environments
The PDU-4T features a 10/100/1000 Mbit/s Ethernet port, making it one of the few switchable PDUs with full Gigabit Ethernet. IPv4 is supported natively, and IPv6 is available on request. This allows the PDU-4T to be integrated into networks with high traffic without bottlenecks.
Much more than power distribution
In addition to outlet control, the PDU-4T functions as a full I/O controller for sensors and peripheral devices.
2 analog sensor ports
For classic Didactum analog sensors such as temperature or humidity.
CAN bus (2 connectors)
For digital CAN sensors and extensions in a chain.
2 dry contacts
For door, window, or status contacts of external devices.
2 x 12V/0.25A relay outputs
For alarm units, sirens, or other 12V actuators.
Integrated temperature sensor
Accuracy ±1 °C, built directly into the device.
Modbus TCP/IP
For integration into existing building management systems.
This makes the PDU-4T suitable for door control, fan control, generator control, UPS monitoring, circuit breaker automation, and the connection of alarm systems.
Three-level power supply
The PDU-4T can be operated via three independent power supply paths that switch automatically by priority.
1. 110–240V AC
The primary power supply. The system automatically selects the input with the highest voltage and therefore has top priority.
2. 12V DC (backup)
Kicks in immediately and without interruption if the main supply fails.
3. 9V DC (battery)
Lowest priority via an optional rechargeable battery for emergency use.
This allows alarm messages to continue being sent even after the regular power supply has failed.
Optional expansion modules
The PDU-4T can be adapted to individual requirements using separately available expansion modules.
4G modem
For mobile-network connectivity independent of the main line.
Modbus RTU expansion
For connecting Modbus RTU-capable devices.
OSDPv2 reader expansion
An alternative to the Modbus module for connecting access readers.
Battery
Rechargeable or replaceable backup battery for emergency operation.
Only one module can be installed at a time in each of the two expansion slots (4G modem slot or Modbus/OSDP expansion slot).
Full control via web interface, app, and protocols
The integrated web interface provides access to virtual sensors, logic schemes, and a wide range of notification methods.
- Notifications via email, FTP log, Syslog, SMTP, SNMP traps, Web-to-SMS, and push
- Supported protocols: DHCP, HTTP, HTTPS, DynDNS, SSL, SNMP v1/v2c/v3, SMTP, FTP, Syslog, RADIUS, Modbus RTU, OpenVPN
- Virtual sensors: PING, timer, trigger, logic schemes, SNMP GET, up to 4 IP cameras, virtual computing elements, and more
- Environmental monitoring: temperature, humidity, voltage, water ingress, smoke, and airflow via connected sensors
- Management of up to 700 elements such as notifications, triggers, timers, logic schemes, and sensors
Applications of the Didactum PDU-4T
The PDU-4T is suitable wherever reliable load management is to be combined with environmental monitoring.
- Data centers: efficient power management for servers and network equipment with optimal load distribution
- Remote maintenance: rebooting unresponsive systems remotely to avoid on-site visits
- Control of peripheral devices such as fans, generators, and UPS systems during power outages
- Door control and access management via dry contacts and alarm relays
- Server rooms and technical cabinets with additional climate monitoring needs via CAN and analog ports
- Sites requiring uninterrupted notifications thanks to three-level power supply
What is included in the package
Please check the scope of delivery for completeness upon receipt and report any missing or damaged parts to your supplier immediately. In case of transport damage, please contact the responsible delivery service directly.
- Power Distribution Unit Didactum PDU-4T1 piece
- Power cable Schuko to C13, 0.75 mm², 230V/10A1 piece
- UTP patch cable, 3 m1 piece
- USB-C OTG cable1 piece
- Terminal block, 3-pin, 3.81 mm1 piece
- Terminal block, 3-pin, 3.5 mm1 piece
- 19" rack mounting brackets2 pieces
- M3 x 8 mm screws6 pieces
- Self-adhesive rubber feet4 pieces
- Configuration guide1 piece
- Warranty card1 piece
Why the Didactum PDU-4T is the right choice
4 x remotely controllable
Switch each outlet on or off and reboot it independently of the others.
Gigabit Ethernet
Full 10/100/1000 Mbit/s network connectivity instead of only Fast Ethernet.
Full-featured I/O controller
Analog ports, CAN bus, dry contacts, and 12V relays in one device.
Three-level power supply
AC, 12V DC backup, and optional battery for maximum failover protection.
Modular expansion
4G modem, Modbus RTU or OSDP expansion, and backup battery can be added later.
19" rack mounting
Includes mounting brackets for direct installation in a 1U rack.
Up to 700 elements
For complex monitoring and automation scenarios.
Made in EU
Developed and manufactured in the European Union.
More about the Didactum PDU-4T
Device detail page & tutorial
Overview of the device, connections, dimensions, and all technical specifications in detail.
To the detail page →Frequently asked questions
How many outlets can be switched independently?
The PDU-4T has 4 C13 outlets (110–240V AC, 10A, bistable relays), each of which can be switched on and off or rebooted individually — manually in the web interface or automatically via logic schemes.
What distinguishes the PDU-4T from other switchable PDUs?
The PDU-4T has a full 10/100/1000 Mbit/s Gigabit Ethernet port, while many comparable switchable PDUs only support Fast Ethernet. In addition, it serves as a complete I/O controller with analog ports, CAN bus, dry contacts, and 12V relay outputs.
How is power supply secured in an emergency?
The PDU-4T supports up to three power supply paths with fixed priority: 110–240V AC as the main supply, a 12V DC backup line that takes over without interruption if the main supply fails, and optionally a battery with the lowest priority for emergency operation.
Which sensors and devices can be connected additionally?
Via 2 analog sensor ports and 2 CAN bus connectors, classic analog sensors as well as digital CAN sensors and extensions can be connected. In addition, 2 dry contacts and 2 x 12V/0.25A relay outputs are available for alarm devices or other actuators.
Which extensions are available for the PDU-4T?
Optionally available are a 4G modem for mobile-network connectivity, a Modbus RTU expansion, or alternatively an OSDPv2 reader expansion, as well as a rechargeable or replaceable backup battery.
The device does not start — what could be the reason?
First check the position of the “N…R” dip switch on the rear side. If it is set to “R” (Restore), the device will not start normally. Set the switch to “N” (Normal) to restore normal operation.
Questions about the Didactum PDU-4T?
Our support team in Germany will advise you free of charge on selection, installation, and configuration.
Gerätebeschreibung | ||
|
| Didactum PDU 4T | Didactum PDU 8T |
| Beschreibung |
|
|
| Geräteverwaltung | Web/SNMP | Web/SNMP |
| Sensorzugang | Dreistufig nach Login | Dreistufig nach Login |
| Schnittstelle und unterstützte Protokolle | ||
| LAN | Ethernet 10/100 Mbit | Ethernet 10/100 Mbit |
| Betriebssystem | Linux v. 6.2 | Linux v. 6.2 |
| Benutzeroberfläche | Beliebiger Browser | Beliebiger Browser |
| Memory RAM | 128 Mb | 128 Mb |
| CPU Geschwindigkeit | 720 MHz | 720 MHz |
| CPU Kerne | 2 | 2 |
| Uhr | Built-in | Built-in |
| Timer | Built-in Watchdog | Built-in Watchdog |
| Maximale Anzahl von Sensoren: physikalische Sensoren, Trockenkontakte, Relais | 100 | 100 |
| Maximale Anzahl von Elementen: Benachrichtigungen, Trigger, Timer, Logik, Sensoren, Trockenkontakte, SNMP Get, SNMP Trap, Dial Task und andere Elemente | 700 | 700 |
| Netzwerk / Protokollunterstütung | ||
| LTE-Gateway-Modus | Internetzugang (Routing für internes Netzwerk) Modem separat zu bestellen | Internetzugang (Routing für internes Netzwerk) Modem separat zu bestellen |
| LTE-Zugangsmodus | Internetzugang über LTE (Modem separat zu bestellen) | Internetzugang über LTE (Modem separat zu bestellen) |
| Netzwerkprotokplle: | DHCP; HTTP; HTTPS; SNMP v1, v2c, v3; SMTP; FTP; Syslog; TLS | DHCP; HTTP; HTTPS; SNMP v1, v2c, v3; SMTP; FTP; Syslog; TLS |
| Modbus RTU (nur mit USB-Konverter) | Mit Erweiterung | Mit Erweiterung |
| Modbus TCP / IP | Ja | Ja |
| Static Routing | Ja | Ja |
| Dynamic DynDNS | Ja | Ja |
| Zugang über RADIUS-Server | Ja | Ja |
| VPN | Ja | Ja |
| SSL Installation | Ja | Ja |
| NTP Server | Ja | Ja |
| Alarme / Benachrichtigungen | ||
| Alarmarten | E-Mail, FTP-Protokoll, Syslog, SMTP, SNMP-Traps, SMS (Modem ist separat zu bestellen), Web-to-SMS | E-Mail, FTP-Protokoll, Syslog, SMTP, SNMP-Traps, SMS (Modem ist separat zu bestellen), Web-to-SMS |
| Maximale Anzahl der "Mail to"-Empfänger in einer E-Mail-Benachrichtigung: | 20 | 20 |
| Eine maximale Anzahl von "SMS an"-Empfängern in einer SMS-Benachrichtigung: auch die maximale Anzahl von Telefonnummern | 20 | 20 |
| Virtuelle Sensoren | ||
| Ping | Integriertes Pingen | Integriertes Pingen |
| IP-Kameras: Verbinden Sie die IP MJPEG-Kamera mit einem Proxy über das Master-Modul. Nur Anzeige, keine Aufzeichnung. | 4 | 4 |
| Get SNMP | Lesen von Daten aus externen Geräten über SNMP PDU GET (v1/2c) | Lesen von Daten aus externen Geräten über SNMP PDU GET (v1/2c) |
| Logische Schemata: | Ja | Ja |
| Timer | Ja | Ja |
| Trigger | Ja | Ja |
| SNMP Traps | Ja | Ja |
| Virtuelles mathematisches Element | Ja | Ja |
| Logische Schemata | Ja | Ja |
| Modbus TCP/IP | Read / Write | Read / Write |
| Stromversorung | ||
| Stromzufuhr | 110-240V, 50-60 Hz | 110-240V, 50-60 Hz |
| Eingang / Einlass: 110-240V AC, 50/60Hz | C14 Fuse 10A | C20 Fuse 16A |
| Sicherung | 10A | 16A |
| Ausgänge /Steckplätze: Bistabile Relais mit Anzeige auf der Frontplatte. C13, 110-240V AC, 50/60 Hz. | 4 | 8 |
| Stromverbrauch | ||
| Gesamte Stromlast | 2,4 kW |
|
| Leistungsmessung | Nein | Nein |
| Eingangsklemme für die Stromreservierung | DC 12V Notstromversorgung, 3,81mm, 2P | DC 12V Notstromversorgung, 3,81mm, 2P |
| Ausgänge | ||
| Relaisausgänge: 12V 0,25A | x2 | x2 |
| Sockets | x4 IEC 320 C13 | x8 IEC 320 C13 |
| Eingänge | ||
| Analoger Anschluss: 6P6C für den Anschluss eines analogen Sensors. (erweiterbar über CAN-Bus) | x2 eingebaut & erweiterbar | x2 eingebaut & erweiterbar |
| CAN-Anschluss: Anschluss von CAN-Bus-Sensoren und -Geräten | x1 Anschluss, max. 32 Geräte | x1 Anschluss, max. 32 Geräte |
| Trockenkontakteingänge (Kontaktschließer/Digitaleingänge) | x2 eingebaut & erweiterbar | x2 eingebaut & erweiterbar |
| Modbus RTU (RS-485): Max. Leitungslänge 1000m | Durch Erweiterung | Durch Erweiterung |
| OSDP v2 reader | Durch Erweiterung | Durch Erweiterung |
| Weitere Anschlüsse | ||
| Ethernet Port | 10/100 Mbit | 10/100 Mbit |
| Micro USB | USB 2.0 HS | USB 2.0 HS |
| Switch Normal / Recovery: | setzt das Gerät auf die Werkseinstellungen zurück | setzt das Gerät auf die Werkseinstellungen zurück |
| Externer Speicher / Logs | ||
| Micro SD Kartensteckplatz | SDXC bis zu 512 GB | SDXC bis zu 512 GB |
| SD-Karten-Formatierung | FAT 32 | FAT 32 |
| USB-Flash-Laufwerk: Protokolle, Sensormesswerte, Elementeinstellungen usw. | Ja | Ja |
| Senden des Systemprotokolls an E-Mail: Protokolle, Sensordaten, Elementeinstellungen, etc. | Ja | Ja |
| Sensor-Dump-Dateien: Speichern der sekündlichen Abtastwerte von analogen Sensoren und Detektoren | Ja | Ja |
| Senden an FTP-Server: Protokolle, Sensordaten, Elementeinstellungen usw. | Ja | Ja |
| Maximale Anzahl von Protokolldateien: | 10.000 Protokolle/Tage | 10.000 Protokolle/Tage |
| Stichprobenrate/Zeitraum (Protokolle, Diagramme) | 1 s | 1 s |
| Syslog | Ja | Ja |
| Umgebungsmerkmale | ||
| Betriebstemperatur: | 0 bis 60°C | 0 bis 60°C |
| Lagertemperatur | -25 bis 85°C | -25 bis 85°C |
| Betriebsfeuchtigkeit | 0 bis 90%, nicht kondensierend | 0 bis 90%, nicht kondensierend |
| Lagerfeuchtigkeit | 0 bis 95%, nicht kondensierend | 0 bis 95%, nicht kondensierend |
| Sonstige Merkmale | ||
| Installation | 19“ | 19“ |
| Maße (L x B x H) in mm | 440 x 44 x 80 | 440 x 44 x 80 |
| Gewicht | 1,3 kg | 1,5 kg |
| Externe Chassis-Erdung | M4-Gewinde | M4-Gewinde |
Extension modules
Extension units
Suitable sensors
CAN sensors
Warranty extension
Software
Manufacturer information:
Didactum® Security GmbH
Im Mühlenfeld 4
48163 Münster
Deutschland
Fon:
(+49) 250 19 71 63 54 / (+49) 171 33 11 577
Email: info@didactum-security.de
