The Whelen part number 01-0669136-060 corresponds to the SCTARM6L Traffic Advisor Remote Lamp Driver. 

This component is designed as a control interface for Traffic Advisor light arrays, which provide directional signaling (arrows) for traffic management.

Model Name: SCTARM6L

Function: Remote Lamp Driver for Traffic Advisor systems

Optics Support: Compatible with systems using Linear-LED®, CON3™, or DUO™ Super-LED® lightheads

System Compatibility: Often used in conjunction with Whelen control heads like the TACTL5 for intuitive operation.

Secondary/Reference: PN: 01-0269135-00A

While the lamp driver is a specific internal component, it typically supports the following standard Traffic Advisor capabilities:

Flash Patterns: Multiple directional signaling options, including left arrow, right arrow, split arrow, and warning functions.

Operating Voltage: Generally 12 VDC.

Protection: Built-in safeguards like short-circuit and over-temperature protection are standard in newer Whelen expansion and driver modules.