8460 Series Diagnostic Opti-Therm Rack Monitor

During normal operation, when the sensors on the trailer are dry and functioning properly, a signal is returned to the monitor. Providing this signal meets predetermined characteristics, the monitor goes to a “permissive” state. This “permissive” state closes a set of relay contacts which changes the status lights on the front of the rack monitor (model number 8460) from red to green and signals to the terminal automation system (T.A.S.) that everything is functioning properly.

During the loading process, if a sensor becomes wetted, the monitor opens a relay enabling the terminal automation system (T.A.S.) to recognize the changed condition. Immediately, the status lights on the rack monitor (model number 8460) switches to red, a “non-permissive” state.

This system can be used for applications that include as many as eight optic or thermistor liquid-level type sensors.

Features/Benefits

• Automatic switching operation, no thinking or manual efforts required by your customers
• Optic and Thermistor technology in one package, eliminating your customer’s concerns about which system technology they use on their transports
• Compatible with all 5-wire optic, thermistor, thermo-optic sensors. Will load all trailers equipped with any brand or style of overfill detection system
• Includes ground verification via a separate relay contact
• Overfill detection and ground verification are signaled to the terminal automation system (T.A.S.) separately, enabling maximum flexibility at the loading terminal without compromising safety

System Specs

Operating Temperature:

• -40˚F to 158˚F (-40˚C to 70˚C)

Input Requirements:

• 120 VAC 60 Hz, 15VA (Standard)
• 120 VAC available — please inquire

Output Relay Contacts:

• 240 VAC — 5A DPDT

Response Time:

• 0.5 seconds maximum, dry to wet transition

Electrical Connections:

• Internal Terminal Strips

Enclosures:

• NEMA 7 explosion proof

Housing Material:

• Aluminum

Approximate Weight:

• 8400 — 30 lbs. 8420 — 31 lbs.
• 8440 — 32 lbs. 8460 — 32 lbs.

Approvals:

• Factory Mutual, CSA

Installation Information:

• Provided with the monitor. If necessary, installation instructions can be ordered separately at no charge.