Fuji Electric LONWORKS OPC-LNW, Инструкция по эксплуатации

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(2) Wiring to the LONWORKS' terminal block (TERM1)
The terminal block uses a pluggable 3-pin connector shown in Figure 5-2. Table 5-1 shows the pin
assignment.
The applicable pluggable connector is "MVSTBR2.5/3-ST-5.08" manufactured by Phoenix Contact
Corporation.
3 2 1
Cable wire
Approx.
7mm
Figure 5-2 Terminal Block and Recommended Strip Length
Table 5-1 Pin Assignment on TERM1
Pin # Pin Assignment Description
1 SD For shielded wire
2 NET A For communication data
3 NET B For communication data
The table below lists the terminal screw size and its recommended tightening torque.
Terminal screw size M3
Tightening torque
0.5 to 0.6 [N ･ m]
The network wiring is polarity insensitive. Connecting the two wires of the network cable to NET A
and NET B enables communication, without regard to polarity. Wire crossing between the
interface card and other nodes causes no problem.
(3) Network termination
Free topology wiring requires a single terminating resistor per segment.
No terminating resistor comes with the interface card. Prepare resistors separately. The
recommended terminating resistor is "TP/FT-10 Channel Terminator Model No.44100"
manufactured by Echelon.
R
C1
C2
+
+
NET A
NET B
R: 52.3 Ω
±
1 %, 1/8W
C1, C2: 100
μ
F, 50 VDC min. voltage rating
Figure 5-3 LONWORKS Network Termination