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This Product is End of Life (EOL)

Switched CW-8H2 20-30A/16-32A 208-240V/230V (8) C13

1U, (8) outlets, (8) C13, circuit breakers

Product Demo Data Sheet

This Product is End of Life (EOL)

The Switched Cabinet PDU 8H2 combines remote configuration and management with power distribution, power monitoring and environmental monitoring. Reboot a single or dual-power server with one command. Receive SNMP alerts when power or environmental conditions exceed thresholds. Assign users specific access rights to designated outlets or groups. Its horizontal configuration offers the perfect solution for small or cramped cabinets where one or two vertical power distribution units will not fit.

Only the Switched Cabinet PDU products provide the flexibility needed for all datacenters and remote sites; including support for 20-amp or 30-amp power input; 208-240V or European 230V configuration; UL 60950-1 branch circuit protection; EN 60950-1:2001, SSL & SSH security; and SNMP-based input current monitoring. For cabinets with low-density servers, this cabinet distribution unit delivers unparalleled solutions.

Designated Switch Products are linkable.

Success Story: Upgrading from Basic Power Strips to Intelligent CDUs-Quickly


Sentry Cabinet PDU Specifications
Item # Available Input
Rated Amperage Available Input Cord Outlets Dimensions
(L x W x D)
CW-8H2A2111 1
CX-8H2A2111 1*
20A IEC 60320/C20
Power Inlet
(8) IEC 60320/C13 1.75" x 17.0" x 7.0"
CW-8H2C2111 1
CX-8H2C2111 1*
30A NEMA L6-30P
Cord Set, 10 ft (3m)
(8) IEC 60320/C13 1.75" x 17.0" x 7.0"
CW-8HEA2111 1
CX-8HEA2111 1*
16A IEC 60320/C20
Power Inlet
(8) IEC 60320/C13 1.75" x 17.0" x 7.0"
CW-8HEK2111 1
CX-8HEK2111 1*
32A IEC 60309
Cord Set, 10 ft (3m)
(8) IEC 60320/C13 1.75" x 17.0" x 7.0"
* CX refers to the Expansion Module
Power Cord Options
> PTCORD-1 IEC 60320/C19 - NEMA L6-20P (20A Twist-Lock) 10'(3m)
> PTCORD-2 IEC 60320/C19 - Schuko 10'(3m)
> PTCORD-3 IEC 60320/C19 - IEC 60309 (BS4343, CEE17) 16/20A Blue (UK Commando) 10'(3m)
> PTCORD-4 IEC 60320/C19 - BS1363 13A (UK) 10'(3m)
Additional Features and Specifications
> cTUVus – UL 60950-1-2003
> CAN/CSA 22.2 No. 60950-1:2003
> TUVGS – EN 60950-1:2001
> FCC Class A, Part 15
> CE
> EMC-EN 55022 Class A, EN 55024

> 10/100 BaseT Ethernet
> SSLv3/TLSv1
> SNMPv2
> SSHv2
> Telnet
> RS-232 (Serial)

Branch Circuit Protection
> Compliant to UL 60950-1

> Temperature & Humidity Probe
- EMTH-1-1 Temperature & Humidity Probe, 10 ft (3 m)
- EMCU-1-1B add 2 additional Temperature & Humidity ports, 4 contact-closure monitoring ports and
1 water sensor port

Remote Power Control

Individual or group outlet remote power control to cycle power and reboot any selected server(s) or other network device(s). Use TCP/IP (HTTP, HTTPS, SSH, Telnet, SNMP) or RS-232 to communicate with each Sentry Cabinet PDU and rectify locked-up network devices. Assign outlets to a group for control of dual-power supply servers and other gear with a single command. Create an unlimited number of groups with any combination of outlets associated to each group. Reduce Mean Time to Repair (MTTR) a failing server by controlling individual power outlet receptacles to reboot any selected server or other device.

HTTP/HTTPs Web Configuration & Control

Use the Sentry Web interface to configure each unit, including network settings, outlet naming & grouping, SNMP traps for environmental & power thresholds and firmware updates. Also use the Web interface to control individual or group outlets and monitor key values, including amperage load(s), temperature/humidity and other environmental conditions. SSL security provides a secure HTTPs connection.

SNMP Management & Event Notification

The Sentry family of products supports the Simple Network Management Protocol (SNMP). This allows network management systems to use SNMP requests to retrieve information and control power for the individual outlets. The Sentry includes an SNMP v1 agent supporting standard MIB I and MIB II objects. A private enterprise MIB extension (Sentry3 MIB) is also supported to provide remote power control. SNMP traps can be generated for various events, including Input Current Load Thresholds (min & max), Temperature Thresholds (min & max), Humidity Thresholds (min & max), water indication, closed contacts (cabinet doors open/close), as well as notification of any time an outlet status is changed (on/off).

Add a Second Tower

Connect an Expansion Cabinet PDU to any Switched Cabinet PDU to control two power input circuits and manage outlets (individual or groups) under 1 IP address - our exclusive strategy for managing dual power-supply servers.

1U Enclosure

A horizontal enclosure that occupies 1U horizontal rack space in the equipment cabinet. It typically mounts on the back of a 19 or 23 inch rack.

Secure Access - SSH or SSL Protection

Secure Shell (SSH), known as Secure Socket Shell, is a Unix-based command interface and protocol for securely getting access to a remote device. Sentry supports SSHv2. Secure Sockets Layer (SSL) is a commonly-used protocol for managing the security of a message transmission on the Internet. SSL is an integral part of most Web browsers (clients) and Web servers. Sentry supports SSLv3/TLSv1.

Integrated Temp/Humidity Probes

Two (2) RJ-style connectors located on the face panel of the PDU's enclosure provide support for two (2) Integrated Temperature & Humidity Probes with ten-foot (10') cables provide real-time measurements in the data center cabinet.

Firmware Flash Upgradeable

Access new firmware updates via FTP for new firmware features and code releases. An update to the firmware does not affect the status of the power outlets.
Click here for the latest Firmware update.


The sentry family of products supports Lightweight Directory Access Protocol (LDAP) Version 3 including LDAPS (LDAP over TSL/SSL). This support enable authentication with LDAP servers; user accounts do not need to be individually created locally on each Sentry device.
This allows administrators to pre-define and configure (in each Sentry product, and in the LDAP server) a set of necessary LDAP groups, and access rights for each. User's access rights can then be assigned or revoked simply by making the user a member of one or more pre-defined Sentry LDAP groups. User account can be added, deleted, or changed in the LDAP server without any changes on individual Sentry products.
Sentry LDAP support has been tested in the following environments:
- Microsoft Active Directory (MSAD)
- Novell eDirectory (eDir)
- Open LDAP

Load Sense

Individual input current monitoring ("Load Sense") provides real-time power measurement of the load in amps on each power inlet, accessible via firmware interface.

RS-232 Control

Serial control via any device with a bi-directional serial port, including a PC, laptop, KVM switch, Console Port Access switch, or terminal server.

20 Amp Power Input Support

20-Amp Power Input Support - IEC320/C20 power inlet receptacles supports any power cord with IEC320/C19 power connector (PTCORD-XX).

24-Character Outlet Receptacle Names

Use the firmware interface (Web or serial) to edit individual outlet receptacles. Identify each receptacle with the device's serial number, IP address, asset allocation #, department or any other method to individually name outlets.

1Denotes End Of Life Product

1Denotes End Of Life Product


Visio Stencil - Visio Stencils - CW-8H / CX-8H

Design Drawing #1 - CW-8Hx-xxx.412-0109-1-1

Design Drawing #2 - CW-8Hx-xxx.412-0109-1-2

Design Drawing #3 - CWG[CXG]-8H2[E]x211.412-0442-10

Wiring Diagrams
Wiring Diagram #1 - 495-0442-1


General Brochures
> Sentry Cabinet Rack PDU Family Brochure
> Sentry Cabinet Rack PDU Density Solution
> Sentry International (230V & 400V) Cabinet PDU Product brochure
> Switched Cabinet PDU Family brochure
> Product Family Comparison-Switched, Smart, Metered and Basic
> Server Technology Cabinet Rack PDUS comparison of solutions

> CW/CX-xxxx-x Switched Cabinet Power Distribution Unit - Installation & Operations (Firmware Version 6.1)
> CW/CX-xxxx-x Switched Cabinet Power Distribution Unit - Installation & Operations (Firmware Version v6.0)
> CW/CX-xxxx-x Switched Cabinet Power Distribution Unit - Installation & Operations (Firmware Version v5.3)

Technical Notes
> OutletControl_FineSNMPSet
> Using Sentry Remote Power Managers with Avocent DSView
> Data & ShutDown Adapters, Cables& Kits
> Sentry Security Features
> Power Tower Cord & Connector Options
> Powering 6 IBM eServer Blade Centers with the Switched CDU
> Powering 5 IBM eServer Blade Centers with the Switched CDU
> Inlet/Outlet Types & Cordsets

> Switched CDU Firmware

Additional Files
> Sentry3 - SNMP (MIB & OID Tree)
> Remote Shutdown Agents

White Papers
> Planning, Implementing and Application of Cabinet Power Distribution Units
> 3-Phase Power in the Data Center
> Cabinet Power Distribution Solutions for Critical Environments at Colliers Turley Martin Tucker
> Smart Load Shedding Ensures Uptime
> Features & Benefits of Implementing Server Technologys Cabinet Power Distribution Units (PDUs) in Your Data Center
> Circuit Breakers - Are you protected?
> JITC tested PDU's for DOD IT and NSA Applications
> Cabinet Level Power Distribution Solutions for High Density Cabinets
> Branch Circuit Protection in PDUs - 30-Amp Power Distribution for IT equipment in the Data Center
> Best Practices for Secure Remote Power Management
> Maximizing Network Uptime - Positive Impacts of Remote Power Management
> True RMS Input Current Monitoring

Application Notes
> Digi Passport and Server Technology Sentry Switched PDUs
> Integration of the MiniCom Remote Access Management Solution with the Server Tech Switched PDU
> Starline Busway & Server Technologys Sentry Smart 60-Amp CDU
> Server Technology Mounting Bracket Guide

RoHS Compliance
> Ca-8HE-bc - SwCDU_DoC


At Server Technology, we pride ourselves on providing a solution to your data center power management needs. But finding a product solution is just the first step, we include complimentary comprehensive product support from the day you purchase your Sentry products.

Every Server Technology product includes a standard two-year warranty. Extended warranty support is also available for purchase; please contact your sales consultant for information and ordering.

Click here for further information on product support.

Video Tutorials for Switched CDUs:

How to Set Up Outlet Groups

How to Set Up Power Up Sequencing

How to Rename Towers and Outlets

How to Download the Shutdown Agent

How to Set Thresholds

How to Add Users and Set Permissions

Global Approvals

Sentry Global PDU Specifications
* Japan Standards:
> PSE Mark to DENAN Law

All products carry the following agency approvals:
> US & Canada (cTUVus mark) to UL 60950-1:2003 and CAN/CSA 22.2 No. 60950-1-03
> European Union (TUVGS mark) to EN 60950-1:2001
> FCC Class A, Part 15
> CE
> EMC to EN 55022 Class A, EN 55024, CISPR 22 Class A

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