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CJ1W-SRM21
Data Sheet (427KB)
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Communication Specifications
| Item | Specification | |
| Communications method | Special CompoBus/S protocol | |
| Communications baud rate | High-speed Communications Mode: 750 kbps Long-distance Communications Mode: 93.75 kbps | |
| Modulation method | Baseband method | |
| Coding method | Manchester coding method | |
| Error control checks | Manchester code check, frame length check, and parity check | |
| Cable | VCTF cable (JIS C 3306) | Two 0.75 mm2 conductors (2 signal wires) Four 0.75 mm2 conductors (2 signal wires and 2 power supply wires) |
| Special Flat Cable | Four 0.75 mm2 conductors (2 signal wires and 2 power supply wires) | |
| Communications distance | 2-conductor VCTF cable | High-speed Communications Mode Main line length: 100 m max. Branch line length: 3 m max. Total branch line length: 50 m max. |
| Long-distance Communications Mode Main line length: 500 m max. Branch line length: 6 m max. Total branch line length: 120 m max. | ||
| 4-conductor VCTF cable | High-speed Communications Mode Main line length: 30 m max. Branch line length: 3 m max. Total branch line length: 30 m max. | |
| Long-distance Communications Mode: Flexibly branched, provided that the total length of cable is a maximum of 200 m. | ||
| Special Flat Cable | High-speed Communications Mode Main line length: 30 m max. Branch line length: 3 m max. Total branch line length: 30 m max. When 4-conductor VCTF cable or Special Flat Cable is used to connect fewer than 16 Slaves, the main line can be up to 100 m long and the total branch line length can be up to 50 m in High-speed Communications Mode. | |
| Long-distance Communications Mode: Flexibly branched, provided that the total length of cable is a maximum of 200 m. | ||
Specifications
| I/O points | 256 (128 inputs and 128 outputs) or 128 (64 inputs and 64 outputs) (Switch-selectable) |
| Applicable PLC models | CJ-series PLCs |
| Unit type | Special I/O Unit |
| Allocated words * | For 256 I/O: 20 words (8 for inputs, 8 for outputs, 4 for status) For 128 I/O: 10 words (4 for inputs, 4 for outputs, 2 for status) |
| No. of mountable Master Units | 40 |
| Node address | 8 addresses per node |
| No. of connectable Slaves | 32 |
| Status information | Communications Error Flags, Participation Flags |
*Uses Special I/O Unit Area (in CIO Area).
Caution: In the interenst of product improvement, specifications are subject to change without notice.
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