ZETRON 280 - Page 43

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Controls and Jumpers
Table 5: Terminal Pinouts for TB2
Table 6: Terminal Pinouts for TB3
Figure 14: Terminal Numbering for TB1, TB2, and TB3
Pin # Label Description
14W+2
Line 2 4-Wire Audio (+) [RX Audio only]
22W+2
Line 2 2-Wire Audio (+) [TX Audio when used in 4-wire]
32W–2
Line 2 2-Wire Audio (–) [TX Audio when used in 4-wire]
44W–2
Line 2 4-Wire Audio (–) [RX Audio only]
54W+3
Line 3 4-Wire Audio (+) [RX Audio only]
62W+3
Line 3 2-Wire Audio (+) [TX Audio when used in 4-wire]
72W–3
Line 3 2-Wire Audio (–) [TX Audio when used in 4-wire]
84W–3
Line 3 4-Wire Audio (–) [RX Audio only]
94W+4
Line 4 4-Wire Audio (+) [RX Audio only]
10 2W+4
Line 4 2-Wire Audio (+) [TX Audio when used in 4-wire]
11 2W–4
Line 4 2-Wire Audio (–) [TX Audio when used in 4-wire]
12 4W–4
Line 4 4-Wire Audio (–) [RX Audio only]
Pin # Label Description
1AC1
12VAC Input 1
2AC2
12VAC Input 2
3 GND
Ground
4DC+
+VDC Input
5 GND
Ground
6SUP
Supervisory Control Output
7PTT
External PTT Input
8MIC
External Microphone Input
9SPK
External Speaker Output
10 GND
Ground
TB2
12 1
1
TB3
TB1
1
10
10