Controllers · 5 codes

Leak detection controllers, 1 to 16 channels

The panel turns a leak into a located, escalated event.

Channels 12 · 4 · 8 · 16

Leak setpoint 150µA, 20 s

Contamination 50µA, 120 s

Cable / panel 500m

Controllers only; no coolant distribution units, no cold plates.

Ask for the specification sheet

A closed leak detection controller enclosure mounted on a rendered wall with a cable gland at its base and the sensing cable leaving through it

01 / Five controllers

Size the panel from the run count

Code	Class, channels	Cable	Outputs
EMS-LD-C1	zone, 1 ch	100 m	1 leak, 1 fault
EMS-LD-C2	zone, 2 ch	200 m	2 leak, 2 break
EMS-LD-C4	read, 4 ch	500 m	2 leak, 2 break, 4–20 mA
EMS-LD-C8	read, 8 ch	500 m	4 leak, 2 break, 4–20 mA
EMS-LD-C16	master, 16 ch	500 m	8 leak, 2 break, 1 maintenance

One channel per aisle, row or rack group.

Four runs, four channels

02 / Ladder

One row per model, deciding figures

Each row links to the datasheet carrying the full parameter set.

Code	Class, channels	Position resolution	Locating accuracy	Locating repeatability
EMS-LD-C1	zone, 1 ch	n/a	n/a	n/a
EMS-LD-C2	zone, 2 ch	n/a	n/a	n/a
EMS-LD-C4	distance-read, 4 ch	0.1 m resolution	±0.6 m + 0.5 %	±0.6 m + 0.25 %
EMS-LD-C8	distance-read, 8 ch	0.1 m resolution	±0.6 m + 0.5 %	±0.6 m + 0.25 %
EMS-LD-C16	distance-read master, 16 ch	0.1 m resolution	±0.6 m + 0.5 %	±0.6 m + 0.25 %

Position resolution is the step the reported distance moves in, not the locating accuracy. The zone models report a zone, so their three rows read n/a.

EMS-LD-C16; every other model carries the same rows on its datasheet.
Class, channels	distance-read master, 16
Max cable per panel	500 m; 31 m per channel (derived)
Position resolution	0.1 m step
Locating accuracy	±0.6 m plus 0.5 % of cable length
Locating repeatability	±0.6 m plus 0.25 % of cable length
Response, zones	5–990 s; 16 physical, 32 virtual/channel
Relays	8 leak, 2 break, 1 maintenance
Analog, protocols	4–20 mA; Modbus RTU and TCP, BACnet, SNMP
Supply, ambient	100–240 VAC; 0 to +50 °C
Enclosure, safety	NEMA Type 1; UL 61010-1, EN 61010-1, CSA C22.2 No. 61010-1
Ingress protection	not specified in this product class

03 / Thresholds

What a commissioning engineer changes

Setting	Value and effect
Leak setpoint	150 µA, held 20 s
Contamination setpoint	50 µA, held 120 s
Contamination range	25–300 µA
Response time	5–990 s, 5 s steps

Current trace

04 / False alarms

One number, two possible causes

A leak and a contamination look the same to the panel.

Step	Action
Symptom	alarms twice a day, no water to find
Response 1	clean and dry 6–48 h; raise the threshold; move the run
Crossover	two wet points average into one distance; fix with a 3 m jumper

Crossover averaging

05 / Integration

The path to the on-call engineer

Path	Detail
Analog, relay	4–20 mA; Form C, 1 A @ 24 VDC
Serial, building	Modbus RTU and TCP; BACnet MS/TP and IP, N2
Network	SNMP, NTP, SMTP, DNS, web
Maps, records	10 maps; 500 or 1,024 events; 288 or 365 days

Signal path

06 / Standards

Panel approvals, loop requirements

UL 61010-1

With EN 61010-1 and CSA C22.2 No. 61010-1.

Name only

CE and RoHS

EU declaration, RoHS for the assembly.

On request

Loop-side standards: IEC 60730-2-23:2025 (sensing elements); IEC 62368-1 (1.5× proof); ASHRAE TC 9.9 passivation to ASTM A380/A967. Ingress protection is not specified in this product class. Certification names are published on the badge cards; approval documents are shown on request.

07 / Commissioning

An untested panel reports nothing

Proof test

Yearly, after commissioning.

Both ends

Panel and BMS input.

Spares

One terminator, one leader, one jumper.

An open leak detection controller enclosure on a bench with its DIN-rail module and terminal blocks exposed, hands landing a wire with a screwdriver — At the terminal blocks

08 / Datasheet

Send the channel count and BMS protocol

Returns the datasheet, the Modbus point list and the enclosure drawing.

Ask EMS-LD-C16 datasheet