Tek-Trol TEK-LCD 7800A-0L1, Инструкция по эксплуатации, Страница: 10 / 36

2.4 Ordering Information
Popular Model
Model Description
Tek-LCD 7800A-0L1 NEMA 4X Loop-Powered Level Meter with Bar Graph
Accessories
Model Description
Tek-LCD 7800A-PLUG75P ¾" NPT Plastic Conduit Plug
Tek-LCD 7800A-6846 Steel Pipe Mounting Kit
Tek-LCD 7800A-6846SS Stainless Steel Pipe Mounting Kit
2.5 Mounting
The Tek-LCD 7800A-0L1 has two slotted mounting flanges that may be used for pipe mounting or
wall mounting. Alternatively, the unit may be supported by the conduit using the conduit holes
provided.
WARNING
Do not attempt to loosen or remove flange bolts while the meter is in service.
2.6 Connections
WARNING
•
Static electricity can damage sensitive components.
•
Observe safe handling precautions for static-sensitive components.
•
Use proper grounding procedures/codes.
•
If the meter is installed in a high voltage environment and a fault or installation error
occurs, high voltage may be present on any lead or terminal.
To access the connectors, remove the enclosure cover and unscrew the two captive screws that
fasten the display module. Disconnect the ribbon cable and remove the display module. Signal
connections are made to a four-terminal connector in the base of the enclosure.
4-20 mA signal input positive terminal connection
SIGNAL - 4-20 mA signal return/negative terminal connection when not using loop
powered backlight.
BAC +9-36 VDC when powering backlight from external supply.
BACKLIGHT - 4-20 mA signal return/negative terminal when using the installed loop powered
backlight or ground/negative when powering backlight from external supply.
NPN open collector output positive.