ACI LD2100 Distance-Read Leak Detection Controller


  • Monitor up to 5,000 feet of sensing cable and spot detectors.
  • Quickly returns to normal status after the sensing cable is wiped dry.
  • Adjustable leak alarm sensitivity.
  • DeltaView technology displays leak location on a web-accessible map.
  • Segment a facility into 32 virtual zones with descriptive labels for quick leak location.
  • Display the status of up to 32 controllers to annunciate multiple simultaneous leaks.

Automation Components, Inc. (ACI) creates, manufactures, and distributes building automation sensors for the heating, ventilation, and air conditioning (HVAC) Industry. Dpstar is ACI Authorised Distributor in Malaysia. Our product lines include Temperature Sensors, Relative Humidity Sensors, Current Sensors, Pressure Sensors, Gas Sensors, and Wireless Sensors.

The LD2100 combines reliable, scalable leak detection with a suite of diverse alarm notification pathways and protects any critical facility from damaging leaks.

What Sets ACI’s LD2100 Apart?

  • Distance-read leak detection pinpoints the precise location of the leak.
  • A supervised system, the controller continuously monitors the cable for leaks, breaks, and disconnects.
  • Robust alarm notification via scrolling display, audible alarm, web interface, email, relay output, and protocol integration; notify users of leaks and faults in real-time.
  • Seamless integration. SNMP, BACnet, and Modbus outputs, plus a summary relay output, allow the LD2100 to deliver information directly to a larger BMS system.
  • Hosts its own web pages so you can access alarms, interactive floor maps, and configuration details from any web browser with no additional fees or subscriptions.


  • Data Centers
  • Clean Rooms
  • Hospitals
  • Telecommunication Centers
  • Museums & Libraries
  • Warehouses


Power Requires an isolated power supply.
24VDC Isolated @ 600mA max., 50/60Hz; requires power supply A/PS24-24V-S (not included)
100/120/230-240VAC @ 500mA max., 50/60Hz power supply; requires LD-ENC enclosure (not included)
Included Accessories Leader cable and EOL terminator
Relay Output 1 Form C summary relay, 1A @ 24VDC, 0.5A resistive @ 120VAC; configurable for latched or non-latched
Sensing Cable Compatible with ACI sensing cables and the SD-Z spot detector
Cable Input Requires 15ft (4.57m) leader cable and EOL terminator (included)
Maximum Length 5,000ft (1524m) of sensing cable
Minimum Length 35ft (10.67m)
Detection Accuracy ± 2ft (0.6m) +/- 0.5% of the cable length
Detection Repeatability ± 2ft (0.6m) +/- 0.25% of the cable length
Detection Response Time 5-995sec, software adjustable in 5sec increments; ±2sec
Ethernet 10/100BaseT, full/half duplex RJ45 connector; 500VAC RMS isolation
EIA-232 DB9 female connector; 9600 baud; 8 data bits, no parity, 1 stop bit
EIA-485 9600, 19200, 38400, or 56700 baud (selectable); Parity: none, even or odd, 8 data bits, 1 stop bit
Protocols TCP/IP, HTML, TFTP
SMTP (Email)
IPv4.0; web pages comply with Rehabilitation Act of 1973, sections 504 and 508, US Dept of Education (website accessibility
for computer users with disabilities
Modbus (EIA-485) V1: V2C MIB-2 compliant; NMS Manageable with Get, Set, Traps: V3 optional
Supports Client Authentication (plain and login); compatible with ESMTP Servers
Modbus TCP/IP UDP/IP Slave; RTU mode; Supports function codes 03, 04, 06 and 16 Master: RTU mode for integration with ACI’s LD5200, LD2100, and LD1500 products; Johnson N2
Modbus Slave; TCP/IP transmission protocol Modbus Master; TCP/IP transmission protocol for integration with ACI’s LD2100 and LD1500 products
BACnet Alarms
Terminal Emulation (EIA232)
ASHRAE STD 135-2004 Annex J
Automatically reports to a single destination
VT100 compatible
Visible Alarm Green, alphanumeric, dot matrix LED display; bi-color status LED
Audible Alarm 70dBA @ 2ft (0.6m); re-sound configurable (disabled, 0-24 hours)
Email (Ethernet) 4 Email recipients; email sent on Alarm and Return to Normal; each alarm notifies all email recipients
SNMP Traps (Ethernet) 4 Community Strings
Logging Capabilities
Event Log
Trend Log
Last 500 events
Cable current level once daily for the last 288 days
Web Interface Login Security 1  password Read Only; 1 password Read/Write
Front Panel Interface
Push Buttons
LED Indicators
Green alphanumeric dot matrix display
Test/Reset: 1
Power/Status: 1 bi-color (Power On: green; Alarm: red)
Operating Environment
32° to 122°F (0° to 50°C) 5%
to 95% RH, non-condensing
15,000ft (4,572m) max.
Storage Environment -4° to 185°F (-20° to 85°C)
Dimensions & Weight 8”W x 4.25”H x 1.25”D (203mmW x 108mmH x 32mmD); 1.5lbs. (680g)
Mounting Wall mountable; wall-mount enclosure LD-ENC or LD-ENC-NP (optional); rack mount bracket RMB (optional)
Certifications CE; ETL listed: conforms to UL 61010-1, EN 61010-1; certified to CSA C22.2 NO. 61010-1; RoHS compliant


ACI LD2100 Leak Detection Controller_DpstarGroup