Mitsubishi FX3U Series User Manual

184
FX3U Series Programmable Controllers
User’s Manual - Hardware Edition
11 Use of High-speed Counters (C235 to C255)
11.2 Input Specifications
11.2 Input Specifications
For input to the high-speed counters, the input terminals X000 to X007 of the main unit or high-speed input
special adapter are used.
→ For the input specifications for X000 to X007 of the main unit, refer to Section 10.2.
11.2.1 High-speed input special adapter (FX3U-4HSX-ADP)
1. Performance specifications
*1. The maximum input frequency to the software counters
*2
is the same as that of signals to be captured
to the input terminals of the main unit.
→ For details on the responce frequency, refer to Subsection 11.9.2.
*2. The software counters include hardware counters that operate as software counters.
→ For the conditions under which the hardware counters operate as software counters,
refer to Subsection 11.8.1.
2. Internal circuit of input interface
11.2.2 Cautions in connecting mating device
Encoders with the output forms in the following table can be connected to the input terminals. (The encoders
may not function correctly depending on electrical compatibility. Check the specifications in advance.)
Voltage output type encoders and absolute encoders cannot be connected to the high-speed counter input
terminals.
Item Specification
Number of input points 4 points (These points are not included in the total number of PLC input/output points.)
Input form Differential line receiver (equivalent to AM26C32)
Max. input frequency
1-phase 1-input
200kHz
High-speed counter operating with hardware counter
*1
1-phase 2-input
2-phase 2-input 100kHz
Min. pulse width 1 µs or more
Insulation
The external wiring of the input block and the PLC are insulated with a photocoupler or a
transformer.
Wiring length Up to 10m
Terminals for connecting Output form that can be directly connected
Input terminals of main unit
Open collector transistor output form
(applicable to 24V DC)
Input terminals of FX
3U-4HSX-ADP
Differential line driver output form
Set the input voltage of FX
3U-4HSX-ADP to 5V DC or less.
Rotary encoder, etc.
High-speed input special adapter
Equivalent to
AM26C32
X00
 +
X00
 -
*1
*1
Class D
grounding
Twisted-pair shielded wire
Non-inverted output
Phase A/B/Z
Inverted output
Phase A/B/Z
0V
SG
SG
330 Ω
5V DC
*1 X00  indicates input number of the high-speed input
special adapter.
*2 SG of the first unit and SG of the second unit are
insulated from each other.
*2
5V DC

Mitsubishi FX3U Series Specifications

General

Model	FX3U Series
Program Memory	64k steps
Execution Speed	0.065 μs/basic instruction
Type	PLC (Programmable Logic Controller)
Power Supply	100-240V AC
I/O Points	Up to 384
Communication	USB
Expansion	Supported via expansion modules
High-Speed Counters	Up to 6 channels
Analog Input/Output	Available via expansion modules
Temperature Range	0 to 55°C
Programming Language	Ladder Logic, Structured Text
Built-in Functions	PID control
Humidity	5 to 95% (non-condensing)