Wiring The Terminal Blocks - Omron VARISPEED L7 Manual

Wiring the Terminal Blocks

Wire Sizes (Same for All PG-Card Models)
Terminal wire sizes are shown in
Terminal
Pulse generator power supply
Pulse input terminal
Pulse monitor output terminal
Shield connection terminal
Wiring Precautions
Consider the following precautions for wiring.
Shielded twisted-pair wires must be used for signal lines. Use cables which are recommended by the
•
encoder manufacturer only.
For the cable connection to the encoder connectors which are recommended by the encoder manufacturer
•
should be used.
Ferrules should be used (refer to
•
The signal lines of the PG Speed Control Card should be separated from main power lines and other con-
•
trol circuits.
The shield must be connected (green grounding cable of the option card) to the ground terminal to prevent
•
operational errors caused by noise.
The wire ends should not be soldered. Doing so may cause contact faults.
•
The PG cards power supply must not be used for anything other than the pulse generator (encoder). Using
•
it for another purpose can cause malfunctions due to noise.
A separate power supply is required if the PG power supply consumption is higher than 200 mA. (If
•
momentary power loss must be handled, use a backup capacitor or other method.)
The PG cards maximum input frequency must not be exceeded. The output frequency of the pulse genera-
•
tor can be calculated using the following formula.
Motor speed at maximum output frequency (min
f
PG (Hz) =
Table 2.15. For the ferrule types refer to
Table 2.15 Wire Sizes
Terminal
Wire Thickness
Screws
• max. 1.0 mm² for flexible wire
• max. 0.5 mm² for flexible wire
-
with ferrules
• max. 1.5 mm² for solid wire
M3.5 0.5 to 2.5 mm²
Table 2.8).
60
Table 2.8.
Wire Type Tightening Torque
Shielded, twisted-pair
wire
Shielded, polyethylene-
covered, vinyl sheath
cable
–1
)
x PG rating (p/rev)
2
0.22 Nm
-
31
2-