Varec TankGate Interface 8315 Series Manuál s instrukcemi Strana 27

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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:
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