Clear-Com HLI-FBS - Manual (Page 17)

Note: The HMS-4X Main Station does not have a power switch, button or key. The system
powers up when you connect the power supply.
2.2.1 HMS-4X Main Station rear panel: Interface modules
Up to three Interface modules (of the same or different types) can be fitted to the extension
bay of the main station. When looking at the rear of the Main Station, expansion slot 1 is the
left-hand slot, expansion slot 2 is the middle slot, and expansion slot 3 is the right-hand slot.
Warning: The interface modules are not hot pluggable. Ensure that the Main Station is
powered down before inserting or removing modules.
Interface module Description
Two-wire interface
module (HLI-2W2) This is a two channel device that enables interoperability with
Tempest
® , CellCom ® / FreeSpeak ® , and HME DX210 systems, as
well as both Clear-Com and RTS analog partyline systems.
Note: This module requires a powered analog party line.
The module provides two analog partyline connectors (3 pin
female XLR connectors) with the following pin out:
Pin Function
1 Ground
2 Power [Option for RTS mode: power and
audio]
3 Audio
Table 2-13: two-wire Interface Module pin out
Use HelixNet main station menus to set the module for either RTS
or Clear-Com systems. If RTS mode is selected, you can set
either:
• Pin 2 for power to mixed audio channel 1 or 3
• Pin 3 for power to mixed audio channel 2 or 4
17 HelixNet Partyline User Guide