LGR250 Control Module Technical Instructions
The LGR250 is a general purpose control module that you can use for a variety of applications. For example, the LGR250 can act as a controller, a BACnet router, and a protocol translator.
To mount the LGR250
Screw the LGR250 into an enclosed panel using the mounting holes provided on the cover plate. Leave about 2 in. (5 cm) on each side of the control module for wiring.
Wiring for power
CAUTIONS
• The LGR250 is a Class 2 device (less than 30 Vac, 100 VA). Take appropriate isolation measures when mounting it in a control panel where non-Class 2 devices (120 Vac or greater) are present.
• Do not power pilot relays from the same transformer that powers the LGR250.
To wire for power
1 Turn off the LGR250’s power to prevent it from powering up before you can verify the correct voltage.
2 Remove power from the power supply.
3 Pull the screw terminal connector from the control module’s power terminals labeled 24V ac/dc and Ground.
4 Connect the transformer wires to the screw terminal connector.
5 Apply power to the power supply.
6 Measure the voltage at the LGR250’s power input terminals to verify that the voltage is within the operating range of 21.6–26.4 Vac.
7 Insert the screw terminal connector into the LGR250’s power terminals.
8 Turn on the LGR250’s power.
9 Verify that the Run LED (a dot in the lower right corner of the Module Status LED) begins blinking. The Module Status LED will show a chase pattern when the control module is running with no errors.
Get pdf LGR250 Control Module Technical Instructions
