for Monitoring, Control & Building Management of Remote Sites

TELSEC Family of Products

Power & Battery Capacity Monitoring

Expandable to 232 inputs & 16 outputs, or 64 inputs & 32 outputs

SNMP Alarm Management

Web Browser for Status & Configuration

Email Alarm Messaging

UL Approved Panel Configuration

1 Year Warranty


The TELSEC ESBx incorporates all the benefits of the standard TELSEC ESB, plus allows custom configuration to house two expansion boards in the same enclosure to reduce space and installation time.


  • TCP/IP over Ethernet Connectivity. Supports SNMP v1, SNMP v2c.
  • Expandable to 128 universal inputs, 64 digital outputs and 10 analog outputs plus 16 stand alone RTU HVAC controllers.
  • Controls multiple air conditioning units for fan, cooling, heat, and economizer through optional Intelligent Roof Top Unit Stand Alone Controllers.
  • Uses Quest’s patented economizer control algorithm to dynamically adjust settings to optimize the use of outside air for cooling. Supports polling and alarming of 512 registers for Modbus RTU slave modules.
  • Converts Modbus RTU data to SNMP for remote polling and alarming of devices.
  • Non-volatile FLASH memory prevents program loss & stores program upgrades.
  • Monitors all environmental alarms: temperature, humidity, fire/smoke, toxic & combustible gas, high water.
  • Built-in RS-232 communications port for on-site monitoring and programming.
  • Built-in 2 line, 40 character LCD display and 18 button keypad for system status and setpoint changes.
  • Card access control of up to 4 doors with 600 cards per system, logging last 800 entries plus Intrusion Monitoring.


  • Simple to install & program
  • Can be configured through a web browser or upload a config file
  • Real time view of your facility and critical equipment
  • Reduces visits to Remote Sites
  • Low cost solution for remote monitoring of your critical facilities
  • Eliminates downtime by acting as an Early Warning System

Part Numbers

TELSEC® ESB: 150770
EXP Expansion Panel: 150775 requires External Power Supply
UIB Board: 130455
DOB Board: 130454
AOB Board: 130456
RTU: 130440


Enclosure/Mounting – Accepts a combination of 2 Input / Ouput Expansion Boards. Wall mounted
Inputs – 16 universal inputs expandable to 128 in 16 input increments, Analog (0-5 VDC or 0-20 mA) or dry contact closures (order part# 130455)
Outputs – Digital – 16 digital outputs expandable to 64 in 8 output increments, (order part# 130454)
Contact Rating – (16) Form A, 1 amp at 30 VDC, 0.3 amps at 60 VDC, 0.5 amps at 125 VAC, (order part# 130454) (8) Form C, 10 amps at 28 VDC, 8.5 amps at 120 VAC
Outputs – Analog Optional – 2 on-board, expandable to 10 analog outputs, 0-10 VDC or 0-20/4-20 mA (order part# 130456)
HVAC Control – 16 stand alone RTU Controllers can be networked to the system (order part# 130440)
Card Access – Supports industry standard Wiegand format, proximity or card swipe readers. Up to 600 cards can be programmed per site. Logs 800 most recent events
Network – RS-485 communications bus for communicating with up to 16 RTU controllers or BACnet T-stats and expansion modules
Card Access – Supports industry standard Wiegand format, proximity or card swipe readers. Up to 600 cards can be programmed per site. Logs 800 most recent events
Power – 24 VAC/20-60 VDC, current draw 0.5 amps at 24 VDC
Front Panel – Built-in programming panel with 18 keys and an 80-character backlit LCD Display
Modem – Optional 56K modem for communications over standard dialup phone line
Serial Port – DB-9 RS-232 port. Supports asynchronous communications. Programmable for speed, parity, & bit format
Serial Network: Modbus RTU selectable for RS485 or 232
Options Supported: 512 registers for reading coils, inputs, analog and holding registers. Registers can be 16 bit integer, 32 bit integer, floating or signed
LAN – Ethernet 10/100BaseT with RJ45 connector
Protocols Supported – Built-in Web Server, Telnet, HTTP, SMTP (Email), SNMP v1, v2c, Traps/Informs
Logging – Logs all inputs, outputs (up to 24,000 entries) and alarms (last 99)
Software – Supports any off-the-shelf terminal communication software and Web browser (e.g. Internet Explorer® 6+, Firefox® 1.5+)
I/O Terminals – 2 piece pull-off terminals for all field wiring
Battery – Long life lithium: 10 year shelf life, 1.5 years under load
Temp/Humidity Sensor Accuracy – Temp: ±1°F (±0.5°C), Humidity: ±2% of range. Temperature & Humidity sensor (standard)
Ambient Operating Temp – -20 to 180°F (-29 to 82°C), 0-95% RH Non-condensing
Certification – UL, CE
Dimensions – 15.25”W x 22”H x 3.5”D (387 x 559 x 89 mm)
Weight – 22 lb. (9 kg)
Warranty – One year

For use under U.S. Patent No. U.S. 10,267,529 B2 when component is part of a patented combination

Specifications subject to change without notice.