RELM Communications Inc SRU50ABC ユーザーズマニュアル
S Series Repeater USER MANUAL
©RELM Communications Inc. Revision 1.0
29
DB25 Digital I/O Connector
Each CMOS logic input is protected by a 10K Ohm series resistor to the input of the logic chip. There is also a 10K
Ohm pull down resistor at each input so as to default the input value to zero.
Each logic output is protected by a 1K Ohm series resistor from the output of the logic chip.
Ohm pull down resistor at each input so as to default the input value to zero.
Each logic output is protected by a 1K Ohm series resistor from the output of the logic chip.
Pin Number And Description:
Digital I/O DB25 Female Rear Connector (standard connection)
Digital I/O DB25 Male Rear Connector
Internal Circuit Board Header SKF Connector
13
1
1
DIGITAL GROUND
25
14
2
INPUT PORT A. Spare 8 bit Logic Input bit 0.
12
2
3
INPUT PORT A. Spare 8 bit Logic Input bit 1.
24
15
4
INPUT PORT A. Spare 8 bit Logic Input bit 2.
11
3
5
INPUT PORT A. Spare 8 bit Logic Input bit 3.
23
16
6
INPUT PORT A. Spare 8 bit Logic Input bit 4.
10
4
7
INPUT PORT A. Spare 8 bit Logic Input bit 5.
22
17
8
INPUT PORT A. Spare 8 bit Logic Input bit 6.
9
5
9
INPUT PORT A. Spare 8 bit Logic Input bit 7.
21
18
10
INPUT PORT B. BCD Channel Select Units bit 0.
8
6
11
INPUT PORT B. BCD Channel Select Units bit 1.
20
19
12
INPUT PORT B. BCD Channel Select Units bit 2.
7
7
13
INPUT PORT B. BCD Channel Select Units bit 3.
19
20
14
INPUT PORT B. BCD Channel Select Tens bit 0.
6
8
15
INPUT PORT B. BCD Channel Select Tens bit 1.
18
21
16
INPUT PORT B. BCD Channel Select Tens bit 2.
5
9
17
INPUT PORT B. BCD Channel Select Tens bit 3.
17
22
18
OUTPUT PORT C. Spare 8 bit Logic Output bit 0.
4
10
19
OUTPUT PORT C. Spare 8 bit Logic Output bit 1.
16
23
20
OUTPUT PORT C. Spare 8 bit Logic Output bit 2.
3
11
21
OUTPUT PORT C. Spare 8 bit Logic Output bit 3.
15
24
22
OUTPUT PORT C. Spare 8 bit Logic Output bit 4.
2
12
23
OUTPUT PORT C. Spare 8 bit Logic Output bit 5.
14
25
24
OUTPUT PORT C. Spare 8 bit Logic Output bit 6.
1
13
25
OUTPUT PORT C. Spare 8 bit Logic Output bit 7.
NC
NC
26
NOT CONNECTED
PC Serial Port to Radio Cable
Signal Name
DB9 PIN#
TD
Transmitted Data
2
RD
Received Data
3
SG
Signal Ground
5