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Brand: Kidde
Kidde ARIES-MLX Multi-Loop Addressable Suppression Control Unit
Description
A modular platform for multi-hazard plants
The Kidde ARIES-MLX is an intelligent, addressable, multi-loop fire alarm and suppression control unit for demanding applications that protect several hazards. The base unit has two signaling line circuits with 255 addresses each, and its modular card cage grows it to eight loops and 2,040 addressable devices per control unit. Sixty-four such units can be networked for 130,560 addresses, subject to limitations noted in the datasheet.
Technical specifications
| Parameter | Specification |
|---|---|
| Model / designation | ARIES-MLX, document K-76-850 Rev AD (effective February 2026) |
| Signaling line circuits | 2 SLCs standard, 255 addresses each (510); expandable by up to 6 SLC cards to 8 loops, 2,040 devices |
| Expansion | Up to 96 relays or 72 release/NAC circuits added to the base 2-loop system; networkable up to 64 nodes (130,560 addresses) |
| Main board circuits | 2 NACs (2.0 A non-synchronized, 1.5 A synchronized), 2 release/NAC circuits, 3 programmable plus 1 trouble Form-C relay (3 A at 30 VDC / 120 VAC) |
| Display | 4 x 40 character keypad display with 4 programmable soft-switches; 10,000 event log |
| Power | 1 to 4 PMUs, 1 or 2 PSUs per PMU; 5.4 A per PSU at 27.6 VDC; 120 or 240 VAC; charges up to 165 Ah; 20 A capacity per enclosure |
| Auxiliary outputs | 2 per PMU, power-limited, 2 A max. each at 19.2 to 27.6 VDC |
| Ports | 2 USB device ports, 2 RS-232, RS-485 annunciator bus (31 remote devices max.) |
| External connectivity | DACT, Modbus RTU and TCP/IP, BACnet MS/TP and IP (add-on card), e-mail alerts |
| Enclosures | 2-Tier 572 x 365 x 137 mm or 3-Tier 800 x 365 x 137 mm, NEMA 1, 16 gauge steel, red; fit between 16 inch studs |
| Batteries | 2 x 12 VDC sealed lead-acid, 12 to 17 Ah in the cabinet (40 Ah max.); larger via external cabinets |
| Listings as printed | FM Approved; UL Listed to ANSI/UL 864 10th edition; ULC; California State Fire Marshal; RoHS compliant |
| Order numbers | 76-800100-901 (3T), 76-800200-901 (2T); 76-800101-902 and 76-800201-902 ULC; 76-800102-901 and 76-800202-901 Chicago; 76-800100-903 and 76-800200-903 expansion enclosures; 76-800100-004 and 76-800200-004 trim rings |
Choosing between SLX and MLX
Choose the MLX when a site needs more than one loop, more relays, or larger battery capacity than the single-loop ARIES-SLX offers. Its card cage accepts SLC cards, release/NAC cards, relay cards, a city tie card, Modbus and BACnet modules, internet communication, DACT, and network interface cards. Fiber-optic converter modules exist for multimode and single-mode fiber for long network runs between nodes.
Integration options include air sampling and high-sensitivity smoke detection through protocol interface cards, linear heat sensor cable through addressable inputs, and a retrofit kit for legacy PEGAsys panels. The configuration tool ACT-MLX is used to program control-by-event logic, and an automatic SLC device-test routine checks devices in groups of 32 and narrows a fault to the failed device.
What to confirm before ordering
A specification needs the enclosure size (2-Tier or 3-Tier), the number of loops and addresses, release and notification circuit counts, battery capacity, the region version (standard, ULC or Chicago) and any network or fiber modules. Cards, enclosures, trim rings, dead fronts and spare parts have separate order numbers in the datasheet, so list them individually. Programming and acceptance testing belong to the fire contractor of record.
Documents and quotation
A copy of the manufacturer’s datasheet K-76-850 (16 pages) sits in the download area of this page. Seven Star LLC, an independent supplier in Muscat, handles the quotation. Please include the part numbers and quantities you need in your request so the quotation matches your order. Related detection and notification items are listed in Logic Controllers.
Datasheets & Documents
- Datasheet Kidde ARIES-MLX datasheet K-76-850 Rev AD (February 2026) Download
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About brand
Engineered fire suppression hardware, cylinders, valves and the control heads that release them, is the side of Kidde that industrial sites deal with. The name goes back to 1917. Seven Star LLC lists Kidde clean agent cylinders, control heads and pilot cylinders, and supplies Kidde fire systems parts to operators and fire contractors in Oman as an independent supplier. Household smoke alarms and aircraft systems sold under the same name are outside our scope.
Kidde fire suppression parts listed here
The listed items are release-train components: the WK-890181-000 electric control head, a 24 V DC unit used on Kidde FM-200 systems, an FM-200 (HFC-227ea) clean agent cylinder in the 200 lb size, and the K62462 pilot gas cylinder. Kidde also builds high-pressure CO2 systems with their own control heads and nitrogen pilot cylinders. Typical sites in the GCC are turbine enclosures, switchgear and control rooms, data halls and marine machinery spaces.
Ordering Kidde parts: what we need
Kidde components are ordered by part number, so send it exactly as printed on the label or in the system drawings. For an agent cylinder we also need the fill weight, valve type and the transport documents required. Send the nameplate photo and the system design reference whenever possible.
Browse Kidde products by category: Fire Fighting.
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Frequently Asked Questions
How many loops does the ARIES-MLX support?
Two SLCs come as standard, each with 255 addresses. Up to six more SLC cards can be added, for eight loops and 2,040 devices per control unit.
Can ARIES-MLX panels be networked?
Yes. Up to 64 nodes can be networked for 130,560 addresses, with some limitations, using network interface cards and optional fiber converters.
What battery capacity can the ARIES-MLX charge?
Up to 165 Ah. The panel cabinet itself holds a pair of 12 or 17 Ah batteries, with a 40 Ah maximum inside.
Does it support building automation protocols?
The datasheet lists Modbus RTU and TCP/IP and BACnet MS/TP and IP through add-on modules, plus a DACT card.
What is the difference between the 2T and 3T versions?
They are two enclosure sizes, 22-1/2 inch and 31-1/2 inch tall, with part numbers 76-800200-901 and 76-800100-901. The larger one has more room for cards and batteries.
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