Wiring Precautions; Common Terminals Of The Control Circuit; Signal Inputs By Contactless Switches - Mitsubishi Electric FR-XC-18.5K-PWM Instruction Manual

NOTE
• Pulling out the wire forcefully without pushing the open/close button all the way down may damage the terminal block.
• Use a small flathead screwdriver (tip thickness: 0.4 mm / tip width: 2.5 mm).
If a flathead screwdriver with a narrow tip is used, terminal block may be damaged.
Commercially available product (as of January 2017).
Product name
Driver
• Place the flathead screwdriver vertical to the open/close button. In case the blade tip slips, it may cause the converter
damage or injury.
Common terminals of the control circuit (PC, SD, SE)
• Terminals PC, SD, and SE are all common terminals (0 V) for I/O signals and are isolated from each other. Do not earth
(ground) these terminals.
• Terminal SD is a common terminal for the contact input terminals (RES, SOF, and LOH). Use a shielded or twisted cable to
protect the terminal against malfunction caused by external noise. Connect the shielded cable to terminal SD (common
terminal). To connect an external power supply to terminal PC, however, connect the shield of the power supply cable to the
negative side of the external power supply. Do not directly earth (ground) the shield to the enclosure, etc. The open
collector circuit is isolated from the internal control circuit by photocoupler.
• Terminal SE is a common terminal for the open collector output terminals (RYA, RYB, and RSO). The contact input circuit is
isolated from the internal control circuit by photocoupler.
Signal inputs by contactless switches
The contact input terminals of the converter (RES, SOF, and LOH) can be
controlled using a transistor instead of a contact switch as follows.
2.7.4

Wiring precautions

• It is recommended to use a cable of 0.3 to 1.25 mm
• The wiring length should be 30 m at the maximum.
However, the wiring length between the control circuit and the box-type reactor should be 5 m at the maximum (refer to
page 64).
• Use shielded or twisted cables for the control circuit terminals and run them away from the main and power circuits
(including the 200 V relay sequence circuit).
• Use two or more parallel micro-signal contacts or twin contacts to prevent a
contact faults when using contact inputs since the control circuit input signals
are micro-currents.
• Always apply a voltage to the fault output terminals (A, B, and C) via a relay
coil, lamp, etc.
Model Manufacturer
SZF
Phoenix Contact Co., Ltd.
0- 0,4 × 2,5
2
for the connection to the control circuit terminals.
Control circuit specification
+24 V
RES, etc.
Multifunction regeneration
converter
SD
External signal input using transistor
Micro signal contacts
INSTALLATION AND WIRING
2
Twin contacts
55