The document describes several models of Liebert OpenComms EM environmental monitoring devices. The EM Controller monitors temperature with an external sensor and has two sensor ports. The EM PDU Controller also monitors temperature and/or humidity with an external sensor, has two sensor ports and two serial ports to monitor power strips. The vEM-14 Controller has a built-in temperature and humidity sensor, four sensor ports, two serial ports and can monitor 10 contact closures. All models connect to networks and notify of alarm conditions via email or SNMP traps.

1. 1
LIEBERT OPENCOMMS™
EM
Product Specification/
Installation Sheet
Description
The Liebert OpenComms EM is a compact, half-duplex
device designed to monitor temperature, humidity,
water detection and contact closure and notify personnel
when those conditions exceed user-defined limits.
The OpenComms EM is available in several models, which vary in size and number and types of ports. All
models have sensor ports to monitor temperature, humidity, water detection and contact closure, and all mod-
els have either an external or built-in temperature/humidity sensor.
The EM Controller:
• has two sensor ports
• ships with an external sensor to detect
temperature only (TMNET kit) or both
temperature and humidity (THCMNET kit)
• has no serial ports
• takes up zero U rack space
The EM PDU Controller:
• has two sensor ports
• ships with an external sensor to detect
temperature only (TMPDUNET kit) or both
temperature and humidity (THCMPDUNET kit).
• has two serial ports to monitor Liebert MP
Advanced Power Strips
• takes up zero U rack space
The vEM-14 Controller:
• has four sensor ports
• has a built-in temperature and humidity
sensor
• has two serial ports to monitor Liebert MP
Advanced Power Strips
• has 10 dry contact inputs
• takes up 1U rack space
Features and Benefits
• Network connectivity
• Web access (HTTP)
• SNMP traps (Nform notification)
• E-mail notification of alarm conditions
• Four user-defined thresholds for each sensor
• High critical
• High warning
• Low warning
• Low critical
• Full password protection
• Graphing capability
• Zero U to 1U of rack space required
• Sensor ports
• Temperature
• Humidity
• Temperature & humidity combination
• Contact closure devices
• Automatic sensing
• Two serial ports (EM PDU / vEM-14 Controllers
only)
• Monitor and control Liebert MP Advanced
Power Strips
Typical Applications
Typical applications include:
• Closets to monitor for temperature problems
• Cabinets to monitor for overheating
• Spot detectors to monitor sensitive or trouble
spots in a computer room
• Monitor common (summary) alarm of a unit for
network notification
The EM PDU Controller is also useful for:
• Control of individual receptacles for on, off and
reboot
• Monitoring power usage for changes in loads on
individual power strips
For other applications, contact your local Liebert
representative or call 1-800-222-5877.

2. 2
Front and Back Views
Dimensions
Power Link Serial
1
ModemSerial
2
Sensor
1
Sensor
2
Power and port indicators
EM PDU
CONTROLLER
vEM-14
CONTROLLER
FRONT VIEW
Sensor
2
Sensor
1
Modem DCNEthernet
EM
CONTROLLER
Power
Sensors Modem
EM PDU
CONTROLLER
Sensor
2
Sensor
1
Serial
2
Serial
1
ModemDCN Ethernet
Power
Serial
devices
Ethernet
vEM-14
CONTROLLER
Power
Sensors Modem
Serial
devices
Ethernet
Dry
contact
inputs
BACK VIEW
Built-in
temperature
& humidity
sensor
4.75" (120.7mm)
2.5"
(63.5mm)
1.625"
(41.3mm)
1.625"
(41.3mm)
2.5" (63.5mm)
TOP
VIEW
BACK
VIEW
SIDE
VIEW
17" (431.8mm)
5"
(127mm)
1.75"
(44.5mm)
17" (431.8mm)
1.75"
(44.5mm)
5" (127mm)
vEM-14 CONTROLLEREM / EM PDU CONTROLLER
4.75" (120.7mm)

3. 3
Web Interface
Hardware and Components
STANDARD COMPONENTS
(Shipped With Kits)
Kit Part Number
TMNET THCMNET TMPDUNET THCMPDUNET vEM-14
• EM Controller - 2 sensor ports ✔ ✔ — — —
• EM PDU Controller - 2 sensor ports, 2 serial ports — — ✔ ✔ —
• vEM-14 Controller - 4 sensor ports, 2 serial ports, built-in
temperature and humidity sensor
— — — — ✔
• CD with software and user manual ✔ ✔ ✔ ✔ ✔
• Power supply ✔ ✔ ✔ ✔ ✔
• Quick-start guide ✔ ✔ ✔ ✔ ✔
• Temperature sensor, 1 ft. (0.3m) ✔ — ✔ — —
• Temperature & humidity combination sensor, 1 ft. (0.3m) — ✔ — ✔ —
• Serial cable for MP Advanced Power Strips, 5 ft. (1.5m) — — ✔ ✔ —
GRAPH
WINDOW
Temperature
Sensor
SUMMARY
WINDOW

4. 4
© 2007 Liebert Corporation
All rights reserved throughout the world. Specifications subject
to change without notice.
® Liebert and the Liebert logo are registered trademarks of
Liebert Corporation. All names referred to are trademarks or
registered trademarks of their respective owners.
SL-28200_REV02_01-07
Liebert Corporation
1050 Dearborn Drive
P.O. Box 29186
Columbus, OH 43229
Telephone: 1-800-877-9222
Facsimile: 1-614-841-6022
www.liebert.com
Specifications
Ordering Information
Power Requirements EM & EM PDU controller vEM-14 controller
Input 120 VAC, 60 Hz 120 VAC, 60 Hz
Output 9 VDC, 500 mA, unregulated 9 VDC, 500 mA, unregulated
Dimensions W x D x H, in. (mm) 4.75 x 2.5 x 1.625 (120.7 x 63.5 x 41.3) 17 x 5 x 1.75 (431.8 x 127 x 44.5)
Weight 7 oz. (198g) 2 lb. (0.9kg)
Mounting 0U, wall-mount or desktop 1U, wall-mount, rack-mount or desktop
Ambient Operating
Environment, °F (°C)
32 to 158 (0 to 70)
10-95% RH non-condensing
32 to 158 (0 to 70)
10-95% RH non-condensing
Communications
Network Interface RJ45 10BASE-T connector
HTTP (Web), E-mail, SNMP
RJ45 10BASE-T connector
HTTP (Web), E-mail, SNMP
Modem 9600 baud, Numeric 9600 baud, Numeric
Agency Listings FCC Class A, CE Mark FCC Class A, CE Mark
LEDs Power, Link, Modem, Sensor, Serial
Ports
Sensor Ports 2 4
Temperature, °F (°C), with ranges: -22 to 248 (-30 to 120) -22 to 248 (-30 to 120)
Humidity with ranges: 0 to 100% RH 0 to 100% RH
Contact closure Normally Open / Normally Closed
2 Serial Ports (EM PDU & vEM-14 controllers) MP Advanced Power Strips
10 Dry Contact Inputs (vEM-14 controllers) — Form C dry contacts
Quantity Part # Description
TMNET EM Controller unit (two sensor ports) with temperature sensor, power supply
THCMNET
EM Controller unit (two sensor ports) with temperature & humidity combination sensor,
power supply
TMPDUNET
EM PDU Controller unit (two sensor ports, two serial ports) with temperature sensor,
power supply, serial cable for MP Advanced Power Strips
THCMPDUNET
EM PDU Controller unit (two sensor ports, two serial ports) with temperature & humidity
combination sensor, power supply, serial cable for MP Advanced Power Strips
vEM-14
vEM-14 Controller unit (four sensor ports, two serial ports) with built-in temperature and humidity
sensor, power supply
TSENSOR15 Temperature sensor, 15 ft. (4.6m)
TSENSOR60 Temperature sensor, 60 ft. (18.3m)
HSENSOR15 Humidity sensor, 15 ft. (4.6m)
HSENSOR60 Humidity sensor, 60 ft. (18.3m)
THCSENSOR15 Temperature & humidity combination sensor, 15 ft. (4.6m)
THCSENSOR60 Temperature & humidity combination sensor, 60 ft. (18.3m)
WSENSOR15 Water detection sensor, 15 ft. (4.6m)
WSENSOR60 Water detection sensor, 60 ft. (18.3m)
CCABLE15 Contact closure cable, 15 ft. (4.6m)
CCABLE100 Contact closure cable, 100 ft. (30.5m)
MPCABLE10 Liebert MP Advanced Power Strip serial cable, 10 ft. (3m)