Item	CJ1W-NC281/-NC481/-NC881/-NCF81/-NC482/-NC882/-NCF82
Dimensions	90 × 65 × 31 mm (H × D × W)
Weight	110 g max.
Internal current consumption	460 mA max. at 5 VDC
Ambient operating temperature	0 to 55°C
Applicable standards	Conforms to cULus and EC Directives.

Note: All other specifications conform to the general specifications of the CJ Series.

Functions and Specifications

Item			Models
			Servo control only
			CJ1W-NC281	CJ1W-NC481	CJ1W-NC881	CJ1W-NCF81
Applicable PLCs			CJ Series
Settable unit numbers			0 to F (unit number as a CPU Bus Unit)
Maximum number of Units			10 Units per Rack, 16 Units per PLC (Can be used on Expansion Racks.)
Allocated I/O words	Position Control Unit Control Memory Areas		25 words in CPU Bus Unit Area
	Axis Operation Memory Areas		43 words for each control axis (2 + 12 output words and 13 + 16 input words) in specified words in the CIO, Work, DM, or EM Area.
	Memory Operation Memory Areas		7 words for each task (3 output words and 4 input words) in specified words in the CIO, Work, DM, or EM Area
	I/O Memory Areas		—
*Controllable Servo Drives 1**			G5-series Servo Drives with Built-in EtherCAT Communications
*Controllable encoder input terminal 2 3*			—
Control method			Control commands using EtherCAT communication
Number of controlled axes			2 axes	4 axes	8 axes	16 axes
Maximum command output speed			104 Mpps *4
Control units	Setting unit		Pulses, millimeters, inches, or degrees
	*Unit multiplier 5**		×1, ×10, ×100, ×1,000, or ×10,000
	*Electronic gear ratio 5**		Unit version 1.1 or earlier: 1/1 to 1,048,576/1,048,576 Unit version 1.3 or later: 1/1 to 4,294,967,295/4,294,967,295
Positioning functions			Memory operation or direct operation
	Single axis control	Position control	2 axes	4 axes	8 axes	16 axes
	Single axis control	Speed control	2 axes	4 axes	8 axes	16 axes
	Inter- polated control	Linear interpolation	2 axes max.	4 axes max.	4 axes max.	4 axes max.
		Circular interpolation	2 axes	2 axes	2 axes	2 axes
		*Helical interpolation 3**	—	—	—	—
	Memory operation	Maximum number of tasks	2	4	4 *6	4 *6
		Sequence functions	JUMP, FOR-NEXT (50 layers/task), PSET, and PRSET
		Dwell timers	500/task, 0 to 10.00 s (Set in increments of 0.01 s.)
Position command values	Data		-2,147,483,648 to 2,147,483,647 command units *7
Position command values	Number of position command values		500/task
Speed command values	*Data 8**		Position control: 1 to 2,147,483,647 command units/s Speed control: -2,147,483,648 to 2,147,483,647 command units/s
Speed command values	Number of speed command values		500/task
Accel- eration times	Data		0 to 250,000 ms
Accel- eration times	Number of acceleration times		500/task
Decel- eration times	Data		0 to 250,000 ms
Decel- eration times	Number of deceleration times		500/task
Auxiliary functions	Overrides		0.01% to 500.00% (Can be set for each axis.)
	Software limits		-2,147,483,647 to 2,147,483,646 command units (Can be set for each axis.)
	Backlash compensation		Backlash compensation is performed using the compensation function in the Servo Drive. The setting range depends on the specifications of the Servo Drive.
	Torque Limits		Unit version 1.1 or earlier: Supports only the ability to enable or disable the torque limits by turning ON or OFF the command bits. Unit version 1.3 or later: Supports the ability to change the torque limit data via the Memory Area/Synchronous Data Link in addition to the ability to enable or disable the torque limits by turning ON or OFF the command bits.
Synchronous Data Link function			None
Control perfor- mance	Control cycle		0.5 ms	0.5 ms when using 1 to 2 axes 1 ms when using 3 to 4 axes	0.5 ms when using 1 to 2 axes 1 ms when using 3 to 4 axes 2 ms when using 5 to 8 axes	0.5 ms when using 1 to 2 axes 1 ms when using 3 to 4 axes 2 ms when using 5 to 16 axes
	Communications cycle		250 µs		250 µs when using 1 to 4 axes 500 µs when using 5 to 8 axes	250 µs when using 1 to 4 axes 500 µs when using 5 to 10 axes 1.0 ms when using 11 to 16 axes
	Starting time *9	Direct operation (high-speed PTP) *10	0.15 to 0.4 ms		0.15 to 0.4 ms when using 1 to 4 axes 0.15 to 0.8 ms when using 5 to 8 axes	0.15 to 0.4 ms when using 1 to 4 axes 0.15 to 0.8 ms when using 5 to 10 axes 0.15 to 1.2 ms when using 11 to 16 axes
		Direct operation (bits) *11	0.75 to 1.25 ms	1.25 to 2.25 ms	2.5 to 4.5 ms	3.0 to 5.0 ms
		Memory operation (linear interpolation) *11	1.75 to 2.25 ms	3.25 to 4.25 ms	6.5 to 8.5 ms	7.0 to 9.0 ms
Control I/O	Servo Drive interface	Communications port	EtherCAT port × 1
		Output signals	There are no external output signals for external outputs. The following command bits are provided for each axis for Servo Drive control: Deviation Counter Reset Bit, Alarm Reset Bit, Servo Lock Bit, Servo Unlock Bit, and Torque Limit Bits.
		Input signals	There are no external input signals for external inputs. The following status flags are provided for each axis for Servo Drive control: Origin Input Flag, Servo Drive Alarm Input Flag, and Positioning Completed Input Flag.
		External interface signals *12	6 signals (external origin signal, origin proximity signal, forward limit signal, reverse limit signal, emergency stop signal, and interrupt input signal) for each axis