This manual confers no industrial property rights or any rights of any other kind,
nor does it confer any patent licenses. Mitsubishi Electric Corporation cannot be
held responsible for any problems involving industrial property rights which may
occur as a result of using the contents noted in this manual.
Mitsubishi will not be held liable for damage caused by factors found not to be
the cause of Mitsubishi; opportunity loss or lost profits caused by faults in the
Mitsubishi products; damage, secondary damage, accident compensation
caused by special factors unpredictable by Mitsubishi; damages to products
other than Mitsubishi products; and to other duties.
For safe use
This product has been manufactured as a general-purpose part for general
industries, and has not been designed or manufactured to be incorporated in
a device or system used in purposes related to human life.
Before using the product for special purposes such as nuclear power, electric
power, aerospace, medicine or passenger movement vehicles, consult with
This product has been manufactured under strict quality control. However
when installing the product where major accidents or losses could occur if the
product fails, install appropriate backup or failsafe functions in the system.
: TOKYO BUILDING, 2-7-3 MARUNOUCHI, CHIYODA-KU, TOKYO 100-8310,
: 840, CHIYODA CHO, HIMEJI, JAPAN
4.1 Applicable PLC
The version number can be checked by monitoring D8001 as the last three digits
*1 An FX2NC-CNV-IF or FX3UC-1PS-5V is necessary to connect the 20SSC-H with
the FX3UC PLC.
*2 Up to 7 units can be connected to the FX3UC-32MT-LT PLC.
4.2 General Specifications
For the general specifications other than the following, refer to the manual of the PLC
The items other than the following are equivalent to those of the PLC main unit.
→ For details, refer to the FX3U Series User's Manual
- Hardware Edition.
→ For details, refer to the FX3UC Series User's Manual
- Hardware Edition.
Model name Applicability
FX3U Series PLC Ver. 2.20 or later (from first production)
Up to 8 blocks can be extended
Ver. 1.30 or later (from the production manufactured in August,
2004 with SER No. 48
Up to 8 blocks can be extended*2
500V AC for one minute
Conforming to JEM-1021
Between all terminals and
ground terminal of PLC
Insulation resistance 5MΩ or more by 500V DC megger
*1 Change the offset and gain values to change the input characteristics. However,
the resolution doesn’t change even when the offset and gain values change.
When the analog value direct indication is enabled in the input mode 2, 5, or 8,
the offset value and the gain value don’t change.
*2 The offset and the gain should satisfy the following condition:
1V ≤ (Gain - Offset)
*3 The offset and the gain should satisfy the following condition:
3 mA ≤ (Gain - Offset) ≤ 30 mA
*4 The input characteristics vary depending on the input mode to be used.
For the details of the input characteristics, refer to the following manual.
→ Refer to the FX3U / FX3UC Series User’s Manual
- Analog Control Edition
• The photo-coupler insulates the analog input area from the PLC.
• The DC-DC converter insulates the analog input area from the
power supply unit.
• Channels are not insulated from each other.
8 point (Count either the input or output points of the PLC.)