UM353-1B Installation
April 2012
7-19
MG00503b
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.
A. Modbus Communications, APACS ACM to Model 353
B. Modbus Communications, Personal Computer to Model 353
G
NCA
NCB
3
4
G
3
4
6* 6*
RS232
Cable,
Note 1
To Personal Computer
Serial Port,
Note 6
RS485
Cable,
Note 2
Common Ground Bus
Single Point
Earth Ground
Case/
Safety
Ground
Case/
Safety
Ground
Model 353
Model 353
RS485 to RS232
Isolated Converter,
Entrelec ILPH 084.233.11
L
CTRL
M
RxD
G
COM
A
TxD+
B
RxD+
D
TxD-
E
RxD-
C
P+
P-
0V
5V
V+
V-
8.5-26 Vdc
K
TxD
2, RxD
3, TxD
4, DTR
8, CTS
5, SG
J
F
Rt
R
E
Jumper Settings
120
Note 4
Note 7
G
NCA
NCB
3
4
G
3
4
6* 6*
120
Note 4
RS232
Cable,
Note 1
To APACS ACM
Serial Port
Note 5
RS485
Cable,
Note 2
Common Ground Bus
Single Point
Earth Ground
Case/
Safety
Ground
Case/
Safety
Ground
Model 353
Model 353
RS485 to RS232
Isolated Converter,
Entrelec ILPH 084.233.11
L
CTRL
M
RxD
G
COM
A
TxD+
B
RxD+
D
TxD-
E
RxD-
C
P+
P-
0V
5V
V+
V-
8.5-26 Vdc
K
TxD
2, TxD
3, RxD
4
8, RTS
5, SG
J
F
Rt
R
E
Jumper Settings
Note 7
(RD)
RTS lead is not used.
Cut back and insulate.
(TD)
(SG)
(RD)
(TD)
(SG)
(RTS)
Cable Label
Cable Label
* Or any station common terminal
* Or any station common terminal
Figure 7-18 Modbus Communications, 353 to APACS™ ACM or Personal Computer
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