Instruction manual

8315 TGI 8215 L&J Tankway Communications Interface Module
Varec, Inc. 17
3.2.2 LED Indicators (D1-D6)
The LED displays indicate the status of the Model 8315’s CPU and
communications. The indicators are identified in the following figure.
• CPU: CPU activity
• COM: Communication between the TankGate and the host computer
• TXD: Transmitting data to tank gauge
• RXD: Receiving data from tank gauge
• +5V: Indicates interface module power
• +VEXT: Indicates external power
Figure 3-2: LED Indicators
3.2.3 External Power Connector (+48V) (J2)
Connect the +48 VDC External Power as shown
below:
Figure 3-3: External Power Connector
3.2.4 Surge/Shield Ground Connector (J4)
Connecting the Surge/Shield ground connector
Caution! This ground connection is important for system safety.
• Connect a 14 AWG copper wire between the ground terminal (J4) and a good earth ground.
Perform this step before connecting ANY other wires.
• Verify that the resistance in this connection does not exceed 1 ohm.
3.2.5 Field Wiring terminal block (J3)
A schematic illustrating the terminal connections of the Model 8315 is shown below: