NOTIFIER   ISO-X

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The Notifier ISO-X(A) Fault Isolator Module is used with Noti- fier Onyx and CLIP series Fire Alarm Control Panels (FACPs) to protect the system against wire-to-wire short circuits on the SLC loops.

• Powered by SLC loop directly, no external power required.
• Base mounts on standard junction boxes (4.0"/10.16 cm square by 2.125"/5.398 cm deep).
• Integral LED blinks to indicate normal condition. Illuminates steady when short circuit condition is detected.
• High noise (EMF/RFI) immunity.
• Wide viewing angle of LED.
• SEMS screws with clamping plates for ease of wiring.
• Opens SLC loop automatically on detection of short, pre- venting the short from causing failure of the entire loop.
• Automatically resets on correction of short.
• Supports Style 4, 6, or 7 wiring.

The Fault Isolator Modules should be spaced between groups of sensors in a loop to protect the rest of the loop. Use to iso- late short circuit problems within a section of a loop so that other sections can continue to operate normally. The ISO-X(A) supports a maximum of 25 devices in-between isolators, except when using relay bases or legacy IPX multisensors.

NOTE: ON LOADS PER RELAY BASE AND LEGACY MULTI- SENSOR DETECTORS/ISOLATORS/ISOLATOR BASES: the maximum number of addressable devices between isolators (or B224BI isolator bases) is 25 devices.

B224RB relay bases and legacy IPX-751 multisensor detec- tors draw more current than all other intelligent devices. When calculating the 25-device maximum: B224RB.

• B224RB represents 2.5 devices.
• IPX-751 in a standard base represents 12 devices.
• IPX-751 in a relay base represents 14.5 devices.
• All other addressable devices represent 1 device.

NOTE: ON MAXIMUM NUMBER OF DEVICES: See the SLC Manual (PN 51253) for information on loss of addresses due to current limitations. Each module or base added reduces the capacity of address positions in an SLC. All SLC field devices must have been purchased after February 1995 to meet the aforemen- tioned requirements. If the SLC field devices were purchased prior to February 1995, each ISO-X(A) used reduces the capacity of an SLC by two address positions. Requirements differ as applied to relay bases (see note above).

The face plate is made of off-white plastic. Includes yellow LED indicator that pulses when normal and illuminates steady when a short is detected.

Automatically opens circuit when the line voltage drops below four volts. Fault Isolator Modules should be spaced between groups of addressable devices (maximum 25, see notes on page 1) in a loop to protect the rest of the loop. If a short occurs between any two isolators, then both isolators immedi- ately switch to an open circuit state and isolate the groups of sensors between them. The remaining units on the loop con- tinue to fully operate.

In Style 4 loops, the ISO-X(A) is generally used at each T-tap branch, to limit the effect of short circuits on a branch to the devices on that branch. The LED indicator is on continuously during a short circuit condition.

The ISO-X(A) Fault Isolator Module automatically restores the shorted portion of the communications loop to normal condi- tion when the short circuit condition is removed.

• Mount on a standard junction box (4.0"/10.16 cm square) which is at least 2.125"/5.398 cm deep.
• Terminal screws are provided for “in and out” wiring.
• Installation instructions are provided with each module.
• Surface-mount box is available as an option.

In some cases, certain modules may not be listed by certain approval agencies, or listing may be in process. Consult fac- tory for latest listing status.

• UL: S635 (UOXX); BP6480 (AMCX, APOU).
• ULC: S635 (OUOXXC, ISO-XA).
• FM Approved.
• CSFM: 7165-0028:0214; 7165-0028:0224; 7165-0028:0243.
• MEA: 17-96-E; 104-93-E Vol. VI; 290-91-E Vol. V; 317-01-E; 447-99-E.
• U.S. Coast Guard: 161.002/42/1 (NFS-640); 161.002/50/0 (NFS2-640/NFS-320/NFS-320C, excluding B210LP(A)).
• Lloyd’s Register: 11/600013 (NFS2-640/NFS-320/NFS- 320C, excluding B210LP(A)).
• BSA: 578-81-SA.

Fault Isolator Modules shall be provided to automatically iso- late wire-to-wire short circuits on an SLC loop. The Fault Isola- tor Module shall limit the number of modules or detectors that may be rendered inoperative by a short circuit fault on the SLC Loop. If a wire-to-wire short occurs, the Fault Isolator Module shall automatically open-circuit (disconnect) the SLC loop. When the short circuit condition is corrected, the Fault Isolator Module shall automatically reconnect the isolated section of the SLC loop. The Fault Isolator Module shall not require any address-setting, and its operations shall be totally automatic. It shall not be necessary to replace or reset an Fault Isolator Module after its normal operation. The Fault Isolator Module shall mount in a standard 4.0" (10.16 cm) deep electrical box, in a surface-mounted backbox, or in the Fire Alarm Control Panel. It shall provide a single LED which shall flash to indi- cate that the Isolator is operational and shall illuminate steadily to indicate that a short circuit condition has been detected and isolated.