Modification

LED monitoring indicator on an LE series sub station. This modification allows users to know that their station is being monitored by a master station.

Difficulty Level

5 – Hard – circuit creation and internal addition.

Components Required

1. Resistor: 1K Ω, 0.25 W
2. LED: general purpose

Instructions

1. Run two extra wires to each sub station requiring the modification. (Only one extra wire is required when using LE-C, LE-CN, or LE-DL.)
2. Install LED and resistor as shown on diagram.
3. When a master station selects that sub station, the LED will illuminate.
4. No physical provisions are made on the sub station for the addition of an LED. Chassis modification or external mounting is required.

Diagram

Notes:

• Inside the sub station, install the general-purpose LED and 1K Ω resistor as shown above.
• Since there is no designated location for placement of the LED, either modify the chassis of the sub station or mount the LED externally.
• The LE-C, LE-CN and LE-DL already have the “+” wire connected to them. Only the “K” wire will need to be added with those models.