CES M-20 Repeater Maker plus, Installation And Operation Manual

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CES SUPPORT 407-679-9440 Page 8 MAN79 © CES 2009
2.5 Component Layout
Fig.2.0
U6 U3
U7
U2
U
4
U
1
K2
K1
J3 J2
J1
Y2
Y
1
U8
U5
F1
S W 1 S W 2
R6 9
R4 0
R3 7 R2 5
R2 4
JP1
JP3
JP4
JP5
JP7
JP8
JP2
JP6
T P 1
T P 2
T P 3
T P 4
R M - 2 0 B O AR D LAY O U T
2.6 Radio Interface Connection
Pin Function Signal Description
1 PTT, NO --------------- PTT relay, normally open
2 PTT, NC --------------- PTT relay, normally closed
3 AUX. COMMON --------------- Auxiliary relay, common
4 TX DISABLE Input -35 to 35 volts, switch @ 2.5v, 47k pull up to 12v
5 TX CTCSS Output CTCSS Output to Transmitter
6 TX AUDIO Output Transmit (Repeat) audio to Transmitter
7 RX AUDIO Input Receive audio from Receiver
8 GROUND --------------- Ground
9 PTT, COMMON --------------- PTT relay, common
10 AUX. NO --------------- Auxiliary relay, normally open
11 AUX. NC --------------- Auxiliary relay, normally closed
12 NO CONNECTION
13 COR (Channel Busy) Input -35 to 35 volts, switch @ 2.5v, 47k pull up to 12v
14 GROUND --------------- Ground
15 12 VOLTS Input Fused & reverse polarity protected