The Problem: installing traditional light box annunciators in classified hazardous areas requires the use of explosion-proof enclosures or pressurization – with limited access.

The Solution: the intrinsically safe LN1000 functions in the same manner and with the same operational logic as conventional annunciator panels, but without the handicaps.

In it’s simplest form the system consists of a 24 VDC power supply, an intrinsic safety isolating interface, and a 12 or 32 channel annunciator unit. Additional I.S. interfaces can be used to transfer signals within, or in and out of, the hazardous location. Bright LEDs indicate alarm trips, and LCD displays show the status. Optional audible and visual warning devices can be added for optimum operator attention.

Built around a lightweight stainless steel chassis, the LN1000 features dual-channel alarm cards accessible via a removable facia panel. Cards can easily be removed for configuration, or additional cards inserted into spare slots. The facia panel includes custom engraved legend plates for each alarm “window”, plus operator pushbuttons for silence, acknowledge, reset, and test. The basic annunciator unit can be installed in your own panel, or we can supply it installed in one of two different syles of wall-mounting enclosure.

Each channel of the annunciator can be programmed independently to respond in a pre-determined manner to the inputs from the alarm contacts on the plant and the operator’s pushbuttons. A range of ISA alarm sequences are supported and selected by DIL switches.