Specifications

17
COMPUTER CONTROL
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
n/a
RxD
TxD
DTR
n/a
RTS
n/a
n/a
ground
SPM522D
(shield)
These connections
may not be required:
DTR to CD;
DTR to DSR;
or RTS to CTS.
9-pin
male female
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
CD
RxD
TxD
DTR
ground
DSR
RTS
CTS
RI
PC
9-pin
female male
SPM522D to PC 9-Pin Connector
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
n/a
RxD
TxD
DTR
n/a
RTS
n/a
n/a
ground
8
3
2
20
7
6
4
5
22
8
3
2
20
7
6
4
5
22
CD
RxD
TxD
DTR
ground
DSR
RTS
CTS
RI
PC
(shield)
These connections
may not be required:
DTR to CD;
DTR to DSR;
or RTS to CTS.
9-pin
male female
25-pin
female male
SPM522D to PC 25-Pin Connector
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
n/a
RxD
TxD
DTR
n/a
RTS
n/a
n/a
ground
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
CD
RxD
TxD
DTR
ground
DSR
RTS
CTS
RI
PC
9-pin
female male
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
n/a
RxD
TxD
DTR
n/a
RTS
n/a
n/a
ground
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
n/a
RxD
TxD
DTR
n/a
RTS
n/a
n/a
ground
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
n/a
RxD
TxD
DTR
n/a
RTS
n/a
n/a
ground
9-pin
male female
9-pin
male female
9-pin
male female
9-pin
male female
#4
#3
#1
#2
Four SPM522Ds Connected to a PC
These connections
may not be required:
DTR to CD;
DTR to DSR;
or RTS to CTS.
When connecting
four SPM522Ds to a
PC 25-pin connector,
refer to "SPM522D to
PC 25-pin connector"
diagram above for
pin assignments.
SPM522D
SPM522D
SPM522D
SPM522D
SPM522D