{"id":575,"date":"2025-11-19T09:59:55","date_gmt":"2025-11-19T09:59:55","guid":{"rendered":"https:\/\/shiremedical.co.uk\/home\/?post_type=product&p=575"},"modified":"2025-11-28T12:35:18","modified_gmt":"2025-11-28T12:35:18","slug":"internal-itx","status":"publish","type":"product","link":"https:\/\/shiremedical.co.uk\/home\/product\/internal-itx\/","title":{"rendered":"Internal ITX"},"content":{"rendered":"

Features:<\/strong>
\nConnection:
\nThe SDX-ITX transmitter is located within an SDX-15 Plant Alarm nearby to the gases being monitored.
\n4no input signals are wired from each gas (plant or manifold), via an end-of-line termination board, knowns as a TB4 PCB.
\nEach gas requires upto a 5-core cable (4no switched conditions and 1no Common) and up to 4no gases can be in-putted via 1no SDX-ITX<\/p>\n

Maintenance:
\nTransmitter PCB obtains a 230vac supply by plugging-in to the SDX Power Supply (this also connects the transmitter to the main 2-core bus).
\nAll input terminations are via simple 45deg PCB mounted terminals.<\/p>\n

Application:
\nThe SDX-ITX is manufactured in a 1, 2, 3 or 4 channel (gas) variation, to suit the customers needs.
\nThese transmitters can also be upgraded to add channels without the need to re-install new\/additional enclosures and supplies.<\/p>\n

The SDX-ITX transmitter receives 4no analogue signals from up to 4no gases (plant or manifold) and then transmits these signals via a 2-core data-bus using Shire Controls own Medcon signal protocol. A single 2-core data-bus can transmit up to 60 status conditions (15no gases, each with up to 4no condition) and channels are determined via hexadecimal (16 way) rotary switches for transmitting (via SDX-15 transmitters) and receiving for display purposes (via SDX-15 Plant Alarms) or for interfacing to others (via SDX Computer Interfaces).<\/p>\n

The transmitter incorporates a separate channel selector switch for each channel provided.<\/p>\n

For monitoring of input signal wiring, a termination box is required to be mounted as close as practical to the gas source. The integrity of the cabling between the gas source and the SDX-ITX is monitored, and a fault on this cable will result in visual system fault warning, with all affected alarm conditions going into alarm condition. \u00a0The system fault warning on the SDX Plant Alarm will also indicate a \u20184\u2019 on the 7-segment display when the \u2018Test\u2019 button is pressed.<\/p>\n

Monitoring of the data-bus connection is always in operation. For the ITX type of transmitter, the SDX Plant Alarm provides this facility. \u00a0The Alarm looks to receive a strobe signal from the designated \u2018Central Panel\u2019 (the 24-hour monitored SDX-15 Plant Alarm), which ensures the system data-bus integrity. Any short-circuit, open-circuit or non-presence of a Central Panel will result in the SDX Plant Alarm giving a system fault warning and a visual warning via a \u20181\u2019 on the 7-segment display when the \u2018Test\u2019 button is pressed.<\/p>\n

As the system is addressable, ALL SDX-15 system equipment (Alarms, Transmitters and Interfaces) can be added\/removed or relocated within the system. This simply requires the 2-core data-bus to be extended from the nearest existing SDX-15 Unit, or tee-ing off from a nearby existing cable run. Use 2-core screened cable (minimum 0.5mm).<\/p>\n

System Fault Warning Indicators are provided from the SDX Plant Alarm as follows:<\/p>\n