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4.2 Wiring for DeviceNet Terminal Block
(1) To connect the communications card to DeviceNet, use a DeviceNet thin cable complying with the
DeviceNet specifications. Also observe the wiring lengths specified in the DeviceNet specifications.
The recommended DeviceNet cable is TDN24U made by SWCC Showa Device Technology, Co.,
Ltd.
Proper installation of the cable requires specialist knowledge. Be sure to refer to the DeviceNet
specifications or DeviceNet construction manual (both are published by ODVA) beforehand.
(2) Wiring around the DeviceNet terminal block (TERM1)
The terminal block uses a pluggable 5-pin connector as shown in Figure 4.2. It has five labels
corresponding to the five pins. Each label has an ID color corresponding to the wire (core) to be connected
to its pin. Make sure that the ID colors of the wires and labels match. Table 4.1 shows the correspondence
between the pin numbers and the ID colors.
A typical connector that matches this terminal block is Phoenix Contact MSTB 2.5/5-ST-5.08 AU.
The Phoenix Contact TMSTBP 2.5/5-ST-5.08 AU and TFKC 2.5/5-STF-5.08 AU (spring-cage
connection type) connectors for multidrop connection cannot be used.
Table 4.1 Pin Layout on DeviceNet Terminal Block
ID Color of
Pin #
Wire Sheath
1
Black
2
Blue
3
Metallic
4
White
5
Red
Table 4.2 lists the recommended terminal screw size and its tightening torque, and Figure 4.3 shows the
recommended strip length of the cable wire end.
Table 4.2 Recommended Tightening Torque of the
Terminal Screws for the DeviceNet Terminal Block
Terminal screw size
M3
(3) Terminating resistor
DeviceNet requires a terminating resistor to be installed externally on each end of the trunk line. Check that
the trunk line is terminated on both ends; if not, install a terminating resistor(s) on the missing end(s).
Terminating resistors do not come with the communications card. A pair of resistors with the
following specifications is separately necessary.
121 ohm ±1%, 1/4 watt, metal-film resistor
4.3 Wiring to Inverter
Route the wiring of the DeviceNet cable as far from the wiring of the main circuit as possible.
Otherwise electric noise may cause malfunctions.
Route the wires, taking care not to let them go over the control PCB, as shown in Figure 4.4.
Otherwise, malfunctions may occur.
Pin
Description
Assignment
V-
Power supply
(24 VDC, - side)
CANL
Signal line (- side)
SD
Cable shield
CANH
Signal line (+ side)
V+
Power supply
(24 VDC, + side)
Tightening torque
0.5 to 0.6 N·m
12
1
2
3
Figure 4.2
Connectors on the
DeviceNet Terminal Block
電 線
Cable wire
Figure 4.3 Recommended Strip Length
of the Cable Wire End for
Terminal Connection
4
5
Approx.
約 6mm
6.0 mm
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