PS Engineering PAR200 - Manual (Page 11)

PS Engineering Inc. ®
PAR200 Audio Selector Panel, COM radio Controller and Intercom System
Installation and Operator’s Manual
200-228-0000 Page 2-4 Rev. 4, Dec. 2013
Some avionics do not provide a separate audio low, and may introduce additional electrical noise into the
system. For best results, connect the audio low from the audio panel to the radio ground, using one con-
ductor of the twisted-shielded cable.
2.5 TY91 VHF COM Interface
2.5.1 TY91 Connector (Trig TY91(L) -05 only)
The TY91 has a 25-pin crimp type connector.
1 Com Audio Low
2 COM Audio High
3 No Connect
4 No Connect
5 RS232RX (data in-TX)
6 RS232TX (data out-RX)
7 No Connect
8 No Connect
9 Aircraft Ground
10 No Connect
11 No Connect
12 Controller Radio Power
13 Radio On
14 No Connect
15 COM Mic Key
16 No Connect
17 No Connect
18 Transmit Interlock
19 Airframe Ground
20 No Connect
21 No Connect
22 Ground (Not Used)
23 COM Mic Audio Hi
24 Aircraft Power
25 Aircraft Power
2.5.2 Interfacing the TY91(L) as Single, COM 1 or COM 2
The PAR200/ Trig TY91(L) can be configured to be a stand-alone COM, or as COM 1 or COM 2 in a
multiple radio installation. In this case, PS Engineering recommends that the PAR200/TY91(L) be used
as COM 2. In the event of a failure, the PAR200 will be in fail-safe, and COM 1 can be used.
If the TY91(L) is used as COM 1, the PAR200 can fail-safe to it, because it is divided internally as audio
panel and COM control. In addition, the TY91(L) power supply is provided by an independent circuit
breaker and power supply in the PAR200. See § 3.2.1 for operational information.
The PAR200 must be configured at installation to be used as COM 1 or COM 2, by removing the top
cover, and placing the DIP switches as shown in Figure §2-4 (page 2-11).
COM 1 OFF J4 Switch 6
COM 2 ON
Table 2-3 Radio Selection
When properly selected, the PAR200 LCD display will read either COM 1, or COM 2.