Siemens 353 User Manual page 187

UM353-1B
To APACS ACM
Serial Port
Note 5
Cable Label
2, TxD
3, RxD
RS232
Cable,
4
Note 1
8, RTS
5, SG
8.5-26 Vdc
To Personal Computer
Serial Port,
Note 6
Cable Label
2, RxD
3, TxD
RS232
4, DTR
Cable,
8, CTS
Note 1
5, SG
RTS lead is not used.
Cut back and insulate.
8.5-26 Vdc
B. Modbus Communications, Personal Computer to Model 353
Notes:
1. RS232 cable must be shielded and less than 50 feet (15 meters) in length. Recommended cable is
Belden 9927, 24 AWG, or equivalent. For an assembled cable, order Siemens PN 16137-191.
2. RS485 recommended cable is Belden 9842, 24 AWG, 120 Ohms or equivalent cable.
3. Up to 32 controllers (Model 352P, Model 353, and Model 353R or i|pac) can be connected.
4. A user-supplied 120 Ohm network termination resistor should be installed on the last device on the network.
5. In APACS TM ACM, set SERIAL Function Block Flow Control to 1.
6. Assembled cable above has DB9 (plug) connector. Connection to computer serial port may require a
DB9 (socket/receptacle) gender adapter.
7. Connection between F and J provided by Entrelec converter.
Figure 7-18 Modbus Communications, 353 to APACS™ ACM or Personal Computer
April 2012
RS485 to RS232
Isolated Converter,
Entrelec ILPH 084.233.11
A
M
(TD)
TxD+
RxD
B
K
(RD)
RxD+
TxD
L
D
(RTS)
CTRL TxD-
(SG) E
G
RxD-
COM
C
J
P+
F
P-
Jumper Settings
0V
Rt
5V
R
V+
E
V-
A. Modbus Communications, APACS ACM to Model 353
RS485 to RS232
Isolated Converter,
Entrelec ILPH 084.233.11
A
M
(RD)
TxD+
RxD
B
K
(TD)
RxD+
TxD
L
D
CTRL TxD-
(SG) E
G
RxD-
COM
C
J
P+ F
P- Jumper Settings
0V
Rt
5V
R
V+
E
V-
RS485
Cable,
Note 2
Note 7
Single Point
Earth Ground
RS485
Cable,
Note 2
Note 7
Single Point
Earth Ground
Installation
Model 353
Model 353
NCA
3 3
NCB
4 4
6* 6*
G G
Case/
Case/
Safety
Safety
Ground
Ground
Common Ground Bus
* Or any station common terminal
Model 353
Model 353
NCA
3 3
NCB
4
4
6* 6*
G G
Case/
Case/
Safety
Safety
Ground Ground
Common Ground Bus
* Or any station common terminal
120
Note 4
120
Note 4
7-19