Garmin GMA 342, Руководство по установке

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190-01878-02 GMA 342/345 Installation Manual
Rev. 5 Page 4-1
4 SYSTEM INTERCONNECTS
4.1 Connector Description
The GMA 342/345 has two 44-pin connectors located at the rear of the unit designated J3401 and J3402
which are oriented as shown in Figure 4-1. The GMA 342/345 is installed into a rack with shield block
backshells.
Figure 4-1 Rear View of Backplate and Connectors
4.2 Pin List
Figure 4-2 Rear Connectors J3401 & J3402, Viewed from Back of Unit
J3401 and J3402 pins are configured as shown in Figure 4-2. J3401 and J3402 pin assignments are given
in Table 4-1, Table 4-2 , and Appendix C .
Following the Table 4-1 & Table 4-2 , additional tables group pin connections by function.
An asterisk (*) following a signal name denotes that the signal is active low logic. Active low inputs are
connected to ground to activate. Active low outputs sink current to ground when active.
4.2.1 J3401 Connector
Table 4-1 J3401 Pin Assignments
Pin Pin Name I/O
1 MARKER ANTENNA HI IN
2 MARKER ANTENNA LO --
3
WIRED TEL AUDIO IN (GMA 342/345)
IN
COM 3 AUDIO IN (GMA 345 3-COM unit only)
4
WIRED TEL AUDIO LO (GMA 342/345)
--
COM 3 AUDIO LO (GMA 345 3-COM unit only)
*Denotes Active Low (Inputs: ground to activate; Outputs: grounded when active)
J3401 J3402