Instruction manual

8315 TGI Overview
Varec, Inc. 1
1Overview
The 8300 series Tank Gate Interface acts as a tank gauge interface for data acquisition and host
gateway for tank farm, pipeline or refinery applications. Options are available for interfacing to
nearly any brand of tank gauge equipment or technologies, making it possible to integrate float
and tape transmitters, HTG, servo, magnetostrictive and radar gauges.
Each 8300 series Tank Gate Interface unit has a built-in motherboard and specific
communications module based on the local field protocol or tank gauging instrumentation
requirements. The motherboard contains a serial data link to enable communication to a host
PC, PLC, or DCS.
Note! Each intelligent module is identified by a 82xx designation that matches the product desig-
nation, for example, the 8303 TGI contains a 8203 communications module.
Each module contains its own processor for fast and reliable field data scanning. Compatibility
of every module also makes configuration of the internal database simple and straightforward.
1.1 Versions
The 8300 series Tank Gate Interface is available in a number of versions that can interface to a
variety of field devices and intelligent instrumentation via interface modules listed below:
• 8303-2 Dual RS-485 (MODBUS) Communications Tank Gate Interface
• 8303-6 Dual RS-485 (GSI ASCII) Communications Interface Module
• 8310 Varec Mark/Space (Varec 1800, 1900, 4000) Tank Gate Interface
• 8311-1 Current Loop (Whessoe Bus) Tank Gate Interface
• 8311-2 Current Loop (GPE) Tank Gate Interface
• 8312 Saab (TRL/2) Tank Gate Interface
• 8314 Enraf (811, 802/812, 854, 873) Tank Gate Interface
• 8315 L&J Tankway (MCG 1000, MCG 1500, MCG 2000) Tank Gate Interface
• 8316 LON (Prime Measurement 3500 ATG) Tank Gate Interface
• 8317 Dual RS-232 Veeder Root (TLS 350) Tank Gate Interface
1.2 Features
• Inputs are reported to Host Computer by Exception or Scanned Poll
• Built-in Software Function Library
• Surge Protection Conforming to ANSI/IEEE C37.90a-1974
• Host Communication via RS-232, RS-485, radio, modem or fiber optic link
• Industry Standard Protocol: Modbus
• Quick-Disconnect I/O Terminations
• Modular Construction for Optimum Expandability
• Non-Volatile Database