3.3. Network configuration
Make up the network as follows.
- Transmission/reception signals (A, B)
Make up the communication path by connecting all transmission/reception data cables.
- Signal common (GND)
GND is the signal common.
- Grounding the shield of cable (SCR)
Connect the all shield lines of network cable. The shield shall be grounded at one end only
prevent currents from being created.
- Termination resistor
A termination resistance of 120 ohms plus or minus 5% shall be connected at each of the two
ends of the segment medium. This option has a termination resistor, so if use, set up the
termination resistor SW. (Refer to 2.1 Outline)
* It is recommended that the Siemens Building Automation FLN Trunk Terminator (PN: 538-664)
be used and that the network termination switch on the APG001Z, SW102, be set to OFF.
At least one set, and no more than two sets, of network bias resistors shall exist for each segment.
This option has local bias resistors.
Termination
120
GND
SCR
510
Node with network
bias resistors
N.B.:Do not connect the SCR terminal to the power ground of inverters or other units.
Keep the network cables 20cm or more separate from the power cables to prevent from
malfunctioning due to electromagnetic noise.
B
A
SCR
+5
Communication
cable
510
B
A
GND
Communication
cable
Node without
bias resistors
- 10 -
E6581541②
SW102 TERM
B
A
120
GND
Termination
SCR
4.7k
4.7k
+5
47k
47k
Node with local bias resistors
This option board
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