Mitsubishi Electric 800 Series Instruction Manual page 65

*8 Connect the recommended 2 W 1 kΩ resistor between terminals PC and OH. (Recommended product: MOS2C102J 2W1kΩ by KOA Corporation)
Insert the input line and the resistor to a 2-wire blade terminal, and connect the blade terminal to terminal OH. (For the recommended 2-wire blade
terminals, refer to
Remove jumpers connecting terminals PC and S1 and terminals PC and S2, and perform wiring as follows. Insulate the lead wire of the resistor,
for example by applying a contraction tube, and shape the wires so that the resistor and its lead wire do not touch other cables. Caulk the lead
wire securely together with the thermal protector input line using a 2-wire blade terminal. (Do not subject the lead wire's bottom area to an
excessive pressure.)
The thermal protector can be connected to the standard model and the Ethernet model only.
To use a terminal as terminal OH, assign the OH (External thermal relay input) signal to an input terminal. (Set "7" in any of Pr.178 to Pr.184.
For details, refer to the FR-E800 Instruction Manual (Function).)
 Instructions for encoder cable wiring
• Use shielded twisted pair cables (0.2 mm
several cables in parallel or use a thick cable, according to the wiring length.
To protect the cables from noise, run them away from any source of noise (such as the main circuit and power supply
voltage).
Wiring length
Within 10 m At least two cables in parallel
Within 20 m At least four cables in parallel
*1
At least six cables in parallel
Within 100 m
*1 When differential line driver is set and a wiring length is 30 m or more.
The wiring length can be extended to 100 m by increasing the 5 V power supply (approximately to 5.5 V) while using six or more 0.2 mm
cables in parallel or a 1.25 mm
• To reduce noise of the encoder cable, earth (ground) the encoder's shielded cable to the enclosure (as close as possible
to the inverter) with a metal P-clip or U-clip.
64
2. Installation and Wiring
2.7 Connection to a motor with encoder (Vector control)
page 53.)
When OH signal is assigned to terminal RH (Pr.182 = "7")
2-wire blade terminal
Insulate
Resistor (2 W1kΩ)
Insulate
2
or larger) to connect the FR-A8AP. For the wiring to terminals PG and SD, use
Example of parallel connection
(with complementary encoder output)
FR-E800
(FR-A8AP)
PA1
PA2
FB1
FB2
PZ1
PZ2
PG
SD
PG
SD
Parallel connection
Wire gauge 0.2
2
mm
2
or larger gauge cable. The voltage applied must be within power supply specifications of encoder.
Earthing (grounding) example using a P-clip
PC
RH(OH)
To thermal protector
2-wire blade terminal
with two cables
Encoder
A
B
C
D
F
G
S
R
2
2 mm
Larger-size cable
2
0.4 mm or larger
2
0.75 mm or larger
2
1.25 mm
or larger
Encoder cable
Shield
P-clip
2
gauge