The Siemens – Fire Safety XTRI-series Intelligent Interface Modules are designed to
provide the means of interfacing direct shorting devices to the fire-alarm control
panel (FACP) SLC. All modules take up one (1) address on the loop.
Each XTRI-series interface module provides the “built-in” ISOtechnology feature -
intelligent dual isolation meeting NFPA 72 Class X (Style 7) wiring requirements.
Up to 252 isolators per loop and up to 30 devices between isolators (wired in
polarity-insensitive mode). Additionally, the devices between isolators can either
be ‘H’-series or the more contemporary ‘X’-series detection devices.
The Siemens – Fire Safety XTRI-series Intelligent Interface Modules are available in
three (3) individual types:
One (1) Dual-Input: XTRI-D
Two (2) Single-Inputs: XTRI-R (with relay) | XTRI-S – The single-input versions are each designed to monitor a normally open
(N.O) or (N.C) normally closed dry contactXTRI-D | XTRI-R | XTRI-S incorporates ISOtechnology – the configurable, built-in
dual isolator function. Additionally, an XTRI-series interface module supports NFPA
72 Class X (Style 7) survivability requirements for shorts while providing reliable
alarm communication to the Siemens FACP. The isolation feature found on the
XTRI-series Intelligent Interface Modules gives information as to the location of the
fault. When a short occurs, the panel can identify the fault automatically, and the
module recognizes the short location (in front of the device or behind the device).
Overall, the built-in isolators improve the diagnostics and location of the problem,
including a short.The modules are configurable by a Siemens compatible FACP (or panels) in an
isolator (polarity sensitive) or non-isolator (polarity insensitive) mode. When a
XTRI-series interface module is configured as an isolator, that module has the
capacity of functioning as both an in/out device, as well as an isolator.Advanced troubleshooting is provided by compatible
panels by identifying when a XTRI-series interface
module is configured as an isolator, but is wired
incorrectly in a polarity-insensitive mode.Each Model XTRI-series device has a multi-color LED that
flashes when GREEN operating in Normal mode; AMBER
if the unit is in a `Trouble’ condition, and RED to
indicate a change of status.Model XTRI-S
This single-input interface module can only monitor and
report the status of a N.O. or N.C. contact.
Model XTRI-R
Through the use of an addressable ‘Form C’ relay, the Model
XTRI-R relay and contact device input are controlled at the
same address. The relay and input contact can be controlled
as a separate function from a Siemens compatible FACP. The
relay is typically used where control or shunting of external
equipment is required.
Model XTRI-D is a dual-input module that is designed to
supervise and monitor two (2) sets of dry contacts. Model
XTRI-D only requires one (1) address, but responds
independently to each input. Model XTRI-D is ideal for
monitoring a water-flow switch and its respective valve
tamper switch.
