Server Tech Sentry Smart PDU, 0U, Expansion Module (CL-16V1-C20M)

Please note, the ServerTech CL-16V1-C20M PDU has been discontinued. For replacement options, please contact your Server Racks Online sales representative.

The Server Tech CL-16V1-C20M is a 0U, 16 outlet, 20A, 100-120V, IEC 60320/C20 power inlet, Sentry Smart Rack PDU Expansion Module.  The Smart Cabinet Distribution Units (CDU) provide reliable power distribution combined with local and remote power monitoring and environmental monitoring via IP. Use the network interface to view power, temperature and humidity levels via Web browser, or receive SNMP based alarms and email alerts when conditions exceed defined thresholds.

The Smart CDU family now has the capability to daisy chain units together. The Expansion CDU Module gives the ability to use one IP address across different power circuits.

Note: This unit is an Expansion Module

Server Tech Smart CL-16V1-C20M PDU Features:

  • Mid and High Density: Single-power input feed; 16 outlets per enclosure
  • High Power Distribution: 100-120V & 208-240V power options; 16, 20, 30, or 32-Amp power input feed options.
  • Input Current Monitor: Precisely measure the aggregate current draw (in amps) on each power circuit. On-site verification of the input current with the LED digital display.  Remote verification via web browser or serial screen.
  • IP Access & Security: Web interface, SSL, SSH, Telnet, SNMP, FTP, SNTP, Syslog, LDAP, LDAPS, TACACS and RS-232 access
  • SNMP Traps: Provide automated alerts for power and environmental conditions
  • Environmental Monitoring: Each Smart CDU supports two external temperature & humidity probes and reports conditions thru the user interface without the need for additional IP addresses
  • Add an Expansion Module: Daisy chain the Smart CDU Expansion Module (CS/CL) for power monitoring of separate power circuits from a single IP address

Additional product specifications are below.

Server Tech Sentry Smart PDU, 0U, Expansion Module (CL-16V1-C20M) - Click to enlarge

Server Technology

Rack UnitsZero U
Dimensions44.5"H x 1.75"W x 2.25"D

Mounting Bracket Options
Include Mounting Bracket KIT-MBVPT-1B (no charge)
No Mounting Bracket Needed

Server Tech CL-16V1-C20M Specifications:

Height 44.50 in. (1130 mm.)
Width 1.75 in. (44.4 mm.)
Depth 2.25 in. (57 mm.)
Available Input Voltages 100-120V
Available Input Cord IEC 60320/C20
Power Inlet
Outlets (16) NEMA 5-20R
Amperage 20A
Branch Circuit Protection Compliant to UL 60950-1

10/100 BaseT Ethernet
RS-232 (Serial)


cTUVus UL 60950-1-2003
CAN/CSA 22.2 No. 60950-1:2003
TUVGS EN 60950-1:2001
FCC Class A, Part 15
EMC-EN 55022 Class A, EN 55024

Server Tech Smart PDU Additional Features:

  • Fuse Retractors for Branch Circuit Protection- These new tool-less retractors pull out for easy access and replacement of fuses. The Sentry CDU Family meets the UL 60950-1 requirement for branch circuit protection.  Attention! The Sentry CDU products meet the above criteria by providing overcurrent protection with UL-listed Bussman SC fuses for each branch circuit.

  • Input Current Monitoring- Exclusive True RMS current monitoring is critical to preventing overloads in high-density computing environments. LED digital displays on the CDU enclosure report the input current of each phase or branch circuit for simple load balancing.

  • Temperature and Humidity- The Smart CDU supports two external 10 (3m) probes. Each of these probes measure both temperature and humidity. Receive SNMP-based alerts or email notifications when conditions exceed defined thresholds.

  • Remote Power Monitoring- Monitor input power via IP or serial interface.

  • HTTP/HTTPs Web Configuration & Control- Use the Sentry Web interface to configure each unit's network settings. SNMP traps for environmental & power thresholds and firmware updates. Also use the Web interface to 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 such as input power, temperature and humidity. 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, and closed contacts (cabinet doors open/close).

  • Add a Second Tower- Connect an Expansion Cabinet PDU to any Switched Cabinet PDU to control two power input circuits and monitor power in the data center (individual or groups) under 1 IP address - our exclusive strategy for managing dual power-supply servers.

  • Zero U Enclosure- A vertical enclosure that occupies Zero Vertical U of rack space in the equipment cabinet. It mounts on the back rails or in the cavity space of the cabinet.

  • 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 Probe Support- 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.

  • LDAP/LDAPS- 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
  • 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 or 30 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). 30-amp power input support provides hard-wired 10' cord and appropriate L5-30 or L6-30 plug type.