Meyer Sound Self-Powered Loudspeakers UM-1P - Manual (Page 11)

Rear Panel and Optional Modules
The user panel and optional modules are described on page 5 of this guide.
User Panel with RMS option and standard Looping Audio Input Module.
Looping, Polarity, and Attenuating Input Module.
Summing Audio Input Module
On / Temp. Summing Inputs
24VFan
- +
Inputs
Limit
Earth /
Chassis
Case
220k Ω
1k Ω Each Each
GND Circuit 1 1 25k Ω Balanced
+
-
3 3
2 2
Summing Audio Input
Push Push
High Limit LED Low Limit LED