EnergyLok Wireless Environmental Monitoring System 300 by Upsite

Please note, the Upsite 300-EMS-001 is discontinued. Visit our Environmental Monitoring page to view other monitoring systems. For specific recommendations, please contact your Server Racks Online sales representative at 1-866-722-5776.

Since the EMS 300 can relay the gathered information to facility monitoring systems, it streamlines communications and allows an unlimited variety of wireless equipment to communicate directly with a BMS or NMS. In addition to wireless sensors, four hardwired digital inputs and two hardwired relay outputs allows the EMS 300 to relay signals from traditional wired sensors and equipment.

View a demo of the real time interface here
Username: EMS
Password: Upsite

Upsite EMS 300 Brochure (PDF)

Upsite 300-EMS-001 - Click to enlarge


While it can operate as a stand-alone device, the EMS 300 can easily integrate into larger systems via SNMP, or building management systems through BACnet. Modbus protocols can serve as a network repeater to convey alarm status information to a centralized location.

The convenient wireless design reduces installation and system expansion costs frequently associated with hard-wired sensors and systems, and allows users to complete installation without the aid of an electrician.

The EMS 300s wireless sensors can receive signals from products transmitting dry contact, analog (0-20mA, 0-5VDC, or 0-10VDC) signals. Commonly used sensors include, but are not limited to, temperature/humidity, temperature, door counters, thermistors, motion sensors, power monitors, and more. (sensors sold seperatly)


  • Wireless design
  • Wireless receivers and antennas are included for indoor open air transmission
  • 418MHz antenna - receives transmissions up to 100 feet (30.5 m)
  • 900MHz antenna - receives transmissions up to 1300 feet (396 m)
  • Additional wired inputs and outputs provides expanded functionality
  • Communication Protocols include: TCP/IP, Terminal Emulation, HTML, SNMO, SMTP, Modbus, TFTP, NTP, BACnet


  • Easy, low cost installation
  • Output readings as Modbus, BACnet, and SNMP for integration with building management systems (BMS) and network management systems (NMS)
  • Web interface enables direct alarm notifi cation and stand-alone operation

300-EMS-001 Specifications:

Depth 4.8"
Width 9.7"
weight2.3 lbs
PowerVoltage Rating: 24VAC, 50/60Hz; 24VDC
Current Rating: 600mA max
Included AccessoriesEMS 300, PSWA-DC-24 power supply, (1) 418MHz antenna and (1) 900MHz antenna, rack mount brackets (sensors sold seperatly)
Wired Digital InputsFour (4) 24V, 10mA max. per channel
Wired Relay Outputstwo (2) Dry Contact, Form C, 1A @ 24VDC resistive, 0.5A@ 120VC
Network2 Green Active & Speed
Status1 Red LED
EIA-485 Status2 Green Transmit & Receive
Web Interface Login Security1 Web password for Read Only; 1 Web password  for Read/Write
Communication Port
Ethernet10/100 BASE-T, RJ45 connector; 500VAC RMS isolation
EIA-232DB9 female connector; 9600 baud; No parity, 8 data bits, 1 stop bit
EIA-4851200, 2400, 9600 or 19200 baud (selectable); Parity: none, even or odd, 8 data bits, 1 stop bit
TCP/IP, HTML, TFTP, SNMPV1: V2C MIB-2 compliant; NMS Manageable with Get
Modbus (EIA-485)Modbus Slave; RTU mode; Supports function codes 03
Modus TCP/IP UDP/IPModbus Slave; TCP/IP transmission protocol
BACnet/IPASHRAE STD 135-2004 Annex J
Terminal EmulationVT100 compatible
Maximum Number of Wireless Points150 - Please note: point repeaters may be required
Wireless InterfaceAppropriate receivers for configuration (418MHz and 900MHz, or 418MHZ and 2.4GHZ). RP/SMA connectors for Antenna
Operating Environment
Temperature32F to 122F (0C to 50C)
Humidity5% to 95% RH (Non-condensing)
Altitude15,000ft (4,572m) max.
Storage Environment-4F to 185F (-20C to 85C)
MountingDesktop, rack mount (brackets included), wall mount (brackets available, sold separately)
CertificationsETL listed; conforms to UL 61010-1, EN 61010; certified to CSA C22.2 NO, 61010.1; RoHS compliant