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' \ / <br />The Universal Distribution Box provides either interface <br />between Gilbarco consoles and dispensing units with Two - <br />Wire current loop (TWI) or between G-SITETM controller <br />and dispensing units or CRINDTMs with RS422 interface. <br />The distribution board(s) are configured with jumpers for <br />either the TWI or RS422 interface. The proper interface <br />connector(s) to the controller is provided based on the <br />Model Number of the distribution box. The Universal <br />Distribution Box works with all Gilbarco electronic fuel <br />dispensing consoles and controllers. <br />NOTE: Interface cables between the distribution box and <br />the console/controller are not included, and must <br />be ordered separately. See Installation Manual for <br />proper length and type of cable required. <br />The distribution box houses the power supply transformer <br />and a removable tray with either one or two printed circuit <br />boards. Each printed circuit board contains a power <br />supply, an opto-coupled current loop interface, an RS422 <br />interface, eight dispenser current loops, and automatic <br />isolation circuitry. <br />Two 4 channel MTA pigtails are provided for each circuit <br />board for field wiring. <br />There are eight individual current data loops for dispens- <br />ing units on each distribution board. Refer to the Con- <br />sole/Controller Installation Manual for the maximum <br />allowable number of data loops for each input. <br />Each data loop has both current regulation and automatic <br />isolation circuitry. The dispenser data loop drivers operate <br />from an unregulated 12 volts DC supply at 45ma for <br />dispensers and CRINDs, or 20ma for G -CATs. <br />NOTE: Ensure that the boards are configured for 20ma <br />current loops if connecting G -CATs to the <br />distribution box. If not, damage to the G -CAT MPU <br />boards will occur. <br />NOTE: Each distribution board must be dedicated for use <br />with either dispensing units, CRINDs, G-CATTMs, or <br />(in the case of Transac System 1000Tm multiple <br />consoles) consoles. No "mixing" of equipment on a <br />distribution board is allowed. <br />NOTE: Only one dispenser, CRIND, or G -CAT can be <br />connected to any one data loop channel. The wiring <br />length between the distribution box and the <br />dispenser, CRIND or G -CAT is not to exceed 2600 <br />feet, and requires stranded or solid 14AWG wire. <br />Daisy chaining is not allowed with this unit. <br />NOTE: For Transac System 1000Tm three or four console <br />installation, or for installing console data wiring <br />into conduit, refer to MDE-2538 Pigtail Cable Kit <br />Instructions. <br />Page 4 MDE-2714A • Universal Distribution Box Service Manual • 02196 <br />