Network Cable Connection; Network Configuration - Toshiba TOSVERT VF-PS1 series Instruction Manual

3.1. Network cable connection

Connect the Metasys
Distributed impedance between
Distributed impedance between
Length of an MSTP segment
* Fix a cable so that a communication connector may be not taken the weight of wire.

3.2. 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)
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.
®
N2 network cable to communication option as follows.
Title
Wire type
Characteristic impedance
conductors
conductors and shield
Cable sheath should be peeled off by about 7mm.
For wiring work, use a flat blade screwdriver with a 0.6mm thick and
3.5mm width blade.
Tightening torque for the terminal block is 0.5Nm.
7mm
B
A
SCR
+5 Communication
cable
510
Description
Shielded twisted cable
Between 100 and 130 ohm
Less than 100pF per meter
Less than 200pF per meter
Foil or braided shield are acceptable.
1200 meters with AWG18 (0.8mm
B
A
GND
Communication
cable
Node without
bias resistors
- 9 -
E6581539
2
)
TERM
B SW4
A
120
GND
Termination
SCR
+5
4.7k 4.7k
47k
47k
Node with local bias resistors
This option board