Russound MCA-C3, User And Installation Manual, Page: 121 / 231

RS-485 DRIVER
RNET Out
Rear Port COM-A RS-232
RNET Debug
J4 RNET
BACK PANEL
RNET In
Tie Shield to Chassis GND
RS-485 Bias Enable Relay
A
B
C
D
5 4 3 2 1
D
C
B
A
1 2 3 4 5
Title
Size Document Number Rev
Date: Sheet of 1 14
Russound Inc
C
MCA C3 Digital Board COM
F
05/20/10
4
6
8
13
11
9
1
16
K1
CY-12V
ESD
1
1
SPAR
K G
A
P
ESD
5
SPAR
K G
A
P
ESD
8
SPAR
K G
A
P
12
L1 IND-
M
O
LDE
D
1
2
C14
1nF
A1
1
A2
2
A3
3
A4
4
A5
5
A6
6
A7
7
A8
8
J1-A
KINSUN_3012-02
1
2
R3
1k
1
2 C2
1nF
A K
D1
S1BB-13F
1
2
3
4
5
6
7
8
9
10
11
J3
CON9
1 2
C7 0.1uF
1
2
C18
1nF
B1
1
B2
2
B3
3
B4
4
B5
5
B6
6
B7
7
B8
8
J1-B
KINSUN_3012-02
1 2
C9 0.1uF
1
2
C17
1nF
1
2
R1
10k
1
2
C12
1nF
1
2
C16
1nF
ESD
9
SPAR
K G
A
P
1
2
C15
1nF
1
2
C10
1nF
ESD
3
SPAR
K G
A
P
ESD
6
SPAR
K G
A
P
ESD
1
SPAR
K G
A
P
1
2
R2
1k
AK
2
D2
BZ
X8
4
-C
5
V6
1
2
C3
1nF
1 2
R5
22R
1 2
C1
0.1uF
1
RO
2
RE
3
DE
4
DI
5
GND
6
A
7
B
8
VCC
U1
AK
2
D3
BZ
X8
4
-C
5
V6
ESD
1
0
SPAR
K G
A
P
ESD
4
SPAR
K G
A
P
ESD
7
SPAR
K G
A
P
ESD
2
SPAR
K G
A
P
1
2
R4 1k
1
2
C5
0.1uF
1
2
C11
1nF
A
K
2
D4
BZ
X8
4
-C
5
V6
1 2
C8 0.1uF
1 2
R6
22R
B
C
E
Q1
MMBT3904LT1
1
2
C13
1nF
12
L2
IND-
M
O
LDE
D
1
2
C4
0.1uF
1
2
3
4
J2
CON4
1 2
C6
0.1uF
V-
V+
Vcc
GND
C2-
C2+
C1-
C1+
R2
R1
T2
T1
2 3
4
5
6 7
8
9 10
11
12
13 14
15
16
17
1
EN
18
SHDN
U2
205-0113
R179
47K
+3.3V
+3.3V
+3.3V
+12V
+3.3V
GND_EARTH2
LINK_IR_1
LINK_IR_2
LINK_IR_3
LINK_IR_4
LINK_IR_5
LINK_IR_6
COM_A
COM_B
485_BIAS
RNET_TXEN
RS232/PGM_RXD
RS232/PGM_TXD
RNET_TXD
RNET_RXD
RS232_SHDN#
+3.3V