CJ1W-CRM21 CJ-series CompoNet Master Units/Specifications

Item		Specification
Communications protocol		CompoNet Network protocol
Types of communications		Remote I/O communications (programless,constant sharing of data with Slave Units)and message communications (explicit message communications as required with Slave Units and FINS message communications as required with Controllers *1)
Baud rate		4 Mbps *2,3 Mbps,1.5 Mbps,93.75 kbps
Modulation		Base-band
Coding		Manchester code
Error control		Manchester code rules,CRC
Communications media		The following media can be used.*3 Round cable I (JIS C 3306,2-conductor 0.75 mm²) Round cable II (JIS C3306 4-conductor 0.75 mm²) Flat Cable I (DCA4-4F10 Standard Flat Cable) Flat Cable II (DCA5-4F10 Sheathed Flat Cable)
Communications distance and wiring		Refer to Cable Types,Baud Rates,and Maximum Distances.
Connectable Master Units		CompoNet Master Units
Connectable Slave Units		CompoNet Slave Units
Maximum I/O capacity		Word Slave Units:1,024 inputs and 1,024 outputs (2,048 I/O points total) Bit Slave Units:256 inputs and 256 outputs (512 I/O points total)
Maximum number of nodes		Word Slave Units:64 input nodes and 64 output nodes Bit Slave Units:128 input nodes and 128 output nodes Repeater Units:64 nodes
Bits allocated per node address		Word Slave Units:16 bits Bit Slave Units:2 bits
Maximum number of nodes per trunk line or sub-trunk line		32 nodes (including Repeater Units)
Applicable node addresses		Word Slave Units:IN0 to IN63 and OUT0 to OUT63 Bit Slave Units:IN0 to IN127 and OUT0 to OUT127 Repeater Units:0 to 63
Repeater Unit application conditions		Up to 64 Repeater Units can be connected per network.When Repeater Units are connected in series from the Master Unit,up to 2 extra segment layers can be created (i.e.,up to 2 Repeater Units are allowed between a Slave Unit and the Master Unit).
Signal lines		Two lines:BDH (communications data high)and BDL (communications data low)
Power lines		Two lines:BS+and BS -(power for communications and internal Slave Unit circuits) Power is supplied from the Master Unit or Repeater Units.
Communications power supply		24 VDC ± 10%
Connection forms		Flat Cable at baud rate of 93.75 kbps:No restrictions Other cables or baud rates:Trunk line and branch lines
		Connections for Slave Units and Repeater Units:T-branch or multidrop connections

*1. FINS message communications are supported by CJ-series Controllers only.
*2. Drop-line connections are not supported with a baud rate of 4 Mbps, so Slaves with prewired cables (Bit Slaves)
cannot be used.
*3. Round cable, Flat Cable, and Flat Cable II are all different types of cable. To use more than one type of cable at a
time, Repeater Units must be used to separate them on trunk lines and sub-trunk lines.

This section provides specifications on the maximum cable length and maximum number of nodes for each type of cable. Do not exceed these specifications.

Cable type	Maximum length per segment (maximum length with Repeater Units)	Branch line length	Total branch line length per segment	Branch location restrictions	Maximum number of Slave Units per segment *2
Round cable I	30 m (90 m)	0 m *1	0 m *1	-	32 nodes
Flat Cable I and Flat Cable II Round Cable II	30 m (90 m)	0 m *1	0 m *1	-	32 nodes

*1. T-branches cannot be connected (only multidrop connections are possible).
*2. Number of nodes including Repeater Units

Cable type	Maximum length per segment (maximum length with Repeater Units)	Branch line length	Total branch line length per segment	Branch location restrictions	Maximum number of nodes per branch *1	Sub- branch line length	Total sub- branch line length per segment	Maximum number of Slave Units per segment *2
Round cable I	30 m (90 m)	0.5 m	8 m	3 branches/m	1 node	0 m	0 m	32 nodes
Flat Cable I and Flat Cable II Round Cable II	30 m (90 m)	0.5 m	8 m	3 branches/m	1 node	0 m	0 m	32 nodes

*1. The maximum number of nodes per branch is the maximum number of Slave Units or Repeater Units that can be
connected to one branch line using multidrop or T-branch connections (sub-branches).
*2. Number of nodes including Repeater Units

Cable type		Maximum length per segment (maximum length with Repeater Units)	Branch line length	Total branch line length per segment	Branch location restrictions	Maximum number of nodes per branch *1	Sub- branch line length	Total sub- branch line length per segment	Maximum number of Slave Units per segment *2
Round cable I	Without branches	100 m (300 m)	0 m *3	0 m *3	-	-	-	-	32 nodes
Round cable I	With branches	30 m (90 m)	2.5 m	25 m	3 branches/m	3 nodes	0 m	0 m	32 nodes
Flat Cable I and Flat Cable II Round Cable II		30 m (90 m)	2.5 m	25 m	3 branches/m	3 nodes	0.1 m *4	2 m *4	32 nodes

*1. The maximum number of nodes per branch is the maximum number of Slave Units or Repeater Units that can be
connected to one branch line using multidrop or T-branch connections (sub-branches).
*2. Number of nodes including Repeater Units
*3. T-branches cannot be connected (only multidrop connections are possible).
*4. T-branch connections from sub-branch lines.

Cable type	Maximum length per segment (maximum length with Repeater Units)	Branch line length	Total branch line length per segment	Branch location restrictions	Maximum number of nodes per branch *1	Sub- branch line length	Total sub- branch line length per segment	Maximum number of Slave Units per segment *2
Round cable I	500 m (1500 m)	6 m	120 m	3 branches/m	1 node	-	-	32 nodes
Flat Cable I and Flat Cable II Round Cable II	No restrictions to a total length per segment of 200 m							32 nodes

*1. The maximum number of nodes per branch is the maximum number of Slave Units or Repeater Units that can be
connected to one branch line using multidrop or T-branch connections (sub-branches).
*2. Number of nodes including Repeater Units

Model	CJ1W-CRM21
Applicable Controllers	NJ *1 /CJ Series
Unit classification	CJ-series Special I/O Unit
Current consumption (Power supplied from Power Supply Unit)	400 mA max.at 5 VDC
Communications power supply connector	One communications power supply connector for Slave Units and Repeater Units on the trunk line when using Flat Cable *2
Communications power supply connector allowable current capacity	5 A max.
Maximum number of mountable Master Units	One word number assigned:40 Units Two word numbers assigned:40 Units Four word numbers assigned:24 Units Eight word numbers assigned:12 Units
Mounting location	According to NJ/CJ-series Special I/O Unit specifications.
Communications power ON/OFF monitoring	The ON/OFF status of the communications power supply can be detected at the communications power supply connector.
Data stored in Master Unit (built-in EEPROM)	1)The following device parameters: Registration Table Registration Table Check Type Registered Slave Unit Participation Monitoring Time,Registered Slave Unit Participation Standby Mode,and Event Disable Setting Software Settings Table Communications Error Communications Stop Mode Communications Error Input Data Zero Clear Mode Network settings 2)Part of error history (depends on type of error; mainly serious error related to communications stopping)
Noise immunity	Conforms to IEC 61000-4-4 2 kV (applied to power supply).
Vibration resistance	10 to 61.2 Hz with single-amplitude of 0.1 mm,61.2 to 150 Hz and 14.7 m/s² in X,Y,and Z directions for 80 min each (sweep time of 8 min × 10 sweeps =80 min)
Shock resistance	196 m/s² (3 times each in X,Y,and Z directions)
Dielectric strength	1,000 VAC for 1 min,Leakage current:1 mA max. Between communications connector or external current supply connector and GR terminal on Power Supply Unit Between communications connector or external current supply connector and all Unit connectors
Insulation resistance	20 MΩ min.(between isolated circuits)
Ambient operating temperature	0 to 55°C
Ambient operating humidity	10 to 90%(no condensation)
Ambient operating atmosphere	No corrosive gases
Storage temperature	-20 to 75°C
Weight	130 g max.(Master Unit only)

*1. Supported only by the CPU Units with unit version 1.01 or later and the Sysmac Studio version 1.02 or higher.
*2. The Master Unit does not required communications power.

CJ1W-CRM21

NJ/CJ-series CompoNet Master Units Increase the Range of Applicability of Sensors and Actuators.

Communication Specifications

Cable Types, Baud Rates, and Maximum Distances

Restrictions (at Baud Rate of 4 Mbps (No Branch Lines))

Restrictions (at Baud Rate of 3 Mbps)

Restrictions (at Baud Rate of 1.5 Mbps)

Restrictions (at Baud Rate of 93.75 kbps)

Specifications

Product Category