FT7000, RACK MONITOR MANUAL 11033PA-ATEX
Product Overview
Dixon prides itself in the quality and reliability of their products. Their mechanical and electronic equipment is designed to withstand the harsh environments that tankers are exposed to. Products are developed with safety, reliability, usability, and customer satisfaction as our primary focus.
Our overfill prevention equipment has been in use in the field since 2000 and continues to set the standard for reliability in the tanker industry. The FT7000 rack monitor is the missing piece to a full
Dixon overfill prevention system. With Dixon products end-to-end, racks and haulers can operate with less downtime and greater confidence in the reliability of their rack.
Compatibility
The FT7000 is compatible with overfill sensors and systems designed to meet the API 1004 and/or
EN13922 standards. Most industry standard equipment will fall under one or both standards. The monitor may also work with products not explicitly designed to either standard, if their operation is similar.
While idle, the FT7000 will continually check for both 2W and 5W trailers. Once a trailer is attached, the monitor will automatically detect what type of sensors are outfitted on the trailer, then switch to the appropriate mode of operation.
SENSORS
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5-Wire (OPTIC) sensors; 1-12 sensors
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2-Wire Black and White (THERMISTOR) sensors 1-8 sensors
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2-Wire Grey-Grey Universal (THERMISTOR) sensors 1-8 sensors
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2-Wire Analog THERMISTOR sensors 1-8 sensors
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Onboard monitors
IDENTIFICATION
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Trailer Identification modules
EARTHING/GROUND DEVICES
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Ground bolt/bolt/wire
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Ground loop/Restive bond
Note: Not compatible with float type sensors, or 3-wire analog thermistor sensors
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Interface
FT7000, RACK MONITOR MANUAL 11033PA-ATEX
1.
NON-PERMIT – The top row of indicators will illuminate red to reflect the state of the permit relays. While the indicators are on, the permit relays are de-energized.
2.
PERMIT – The second row of indicators will illuminate green to reflect the state of the permit relays. While the indicators are on, the permit relays are energized.
3.
5WIRE SENSOR MODE – Illuminates to indicate a trailer having 5 wire sensors has been attached and identified.
4.
2WIRE SENSOR MODE – Illuminates to indicate a trailer having 2 wire sensors has been attached and identified.
5.
GROUND-OK – The GND indicator will illuminate blue to reflect the state of the ground relay.
While the indicator is on, the ground relay is energized. If no ground configurations are enabled the ground indicator and relay will be active constantly.
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FT7000, RACK MONITOR MANUAL 11033PA-ATEX
6.
BYPASS ACTIVE – Indicator shows red when Overfill bypass is active, and blue when Ground bypass is active.
7.
ID FOUND – The ID indicator will show green when a valid trailer identification module is found.
When an unknown or expired trailer identification module is found the indicator will flash.
8.
OVERFILL DETECTED – The LNX indicator reflects the state of the LINX relay contacts. When active, the attached trailer became non-permissive and is still attached. Refer to the LINX section below for more information about the LINX overfill detection system.
9.
COMPARTMENT INDICATORS – Each compartment indicator can show either red or green to show the wet or dry status of the sensors, respectively. Indicators will be off if the compartment/sensor is not found, or unknown.
Remote Interface
The FT7000 is outfitted with an RS-485 port allowing the monitor to be managed remotely. Loading terminals having multiple loading lanes may monitor the status of all Rack monitors at a central computer using the RackView software. The FT7000’s communications are Modbus compatible and may be connected onto an existing Modbus installation.
Output Relays
The FT7000 features 4 DRY FORM C (SPDT) relays. All relay contacts are dry and have Normally Open,
Normally Closed, and Common contacts. All output relays are failsafe, featuring several methods of protection against failure
The relays feature a hardware feedback safety check that constantly monitors for any stuck or welded contacts. Should any relay’s contacts become stuck or welded, the rack monitor will become nonpermissive and de-energize all relays. Redundant Permit relays are used to ensure the permit contacts can always open even if one becomes is stuck or welded. A hardware timeout circuit will automatically de-energize a relay that has not been verified within 400ms.
•
PERMIT – The permit relay will energize once all enabled requirements have been met. This relay is often wired into the loading pump circuit, to interrupt loading if an unsafe condition occurs. The Relay will reflect the same state that the green and red indicators show on the front of the FT7000. Green indicates the permit relay is energized, while red indicates it is not energized.
If a ground device is enable, the permit relay will require dry overfill sensors and a good ground connection before energizing, otherwise dry sensors will permit. This relay is further protected against failure by having series redundant contacts. Should any contact become stuck or welded, the secondary relay can still open the contacts.
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PERMIT – A secondary permit relay allows the monitor to control 2 separate circuits. This relay features the same protections of the other permit relay but has its own fuse.
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LINX
The LINX relay indicates a true overfill situation. Refer to the LINX section below for more information about this feature.
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FT7000, RACK MONITOR MANUAL 11033PA-ATEX
•
GROUND
The ground relay will energize when any of the enabled ground devices has been found. This relay will match the ground indicator on the front display. Removing the ground device will deenergize the relay.
Bypass
Trailers attempting to load may have a failed sensor or grounding device. In these situations, the terminal operator may deem the trailer safe to load and authorize a bypass using a bypass card. Once the FT7000 has been put into bypass mode, any of the following conditions will end the bypass:
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A trailer sensor becomes wet
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Rack cord is disconnected from trailer
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Bypass is manually ended
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30 minutes has elapsed
Two types of bypass cards exist:
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OVERFILL BYPASS CARD This card will bypass ALL safety checks and can place the rack monitor into a permissive state .
•
GROUND/TIM BYPASS CARD - This card will only bypass the ground checking function of the rack monitor . Overfill sensors must still be operational.
Bypass cards can be removed or added, with a limit of 10 registered to an FT7000 at any given time. The same card may be used with several different FT7000 units. Refer to the Bypass Card Pairing Procedure for more information.
Trailer Identification and Verification
The FT7000 can read trailer identification modules and search its internal list of valid trailers. This function will not work without the use of the RS485 communications port and the RackView software. If the rack monitor is configured with ID enabled, all loading trailers must be outfitted with ID modules, added to the database in the RackView software, and be within their inspection period. Managing the approved trailer IDs and customers is done through the RackView software.
LINX Overfill detection system
The FT7000 distinguishes between a disconnected trailer and an overfilled trailer using the LINX overfill detection system. Traditional rack monitors will show red NON-PERMISSIVE signals while sitting idle, as well as while a tanker is overfilled. The rack operators have no visible way to determine the cause of the non-permit signal and therefore cannot judge the potential danger.
Unlike the traditional non-permit indicator, the LINX indicator will not be active while no trailer is connected to the rack monitor. The LINX indicator and relay will only active when a permissive trailer is attached then loses permissiveness. While the non-permissive trailer remains connected to LINX overfill detection system will indicate that an overfill is detected.
The LINX overfill detection system has limited functionality on FT7000 units with no grounding-devicedetection enabled. Refer to the table below to determine if your trailers will be compatible with the
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