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Communication Module [CPU Link Module (Coaxial cable)]

System configuration

System configuration

Specifications

Item Specification
Type EH-LNK
Functional specification Number of connected Link module Max. 64 units / 1 loop
Number of mounted units Max. 2 units / 1 CPU ( 2 loops / 1 CPU )
Number of Link points 1,024 words / 1 loop ( 2,048 words / 2 loops ) *1
Data delivery system Common data area system
Send / Receive distinction on data area allocation Parameter setting from peripheral device
Designation of Station No. 0 to 63 ; designated by rotary switch
Communication speed 1.0 Mbps
Transfer method Half-duplex serial transfer, frame synchronization
Communication method Token passing
Modulation method Base band
Refresh time At the time of transfer of 1,024 words with 64 stations connected -- Approx. 390ms *2
Error check CRC, overrun check, time out, open circuit, parameter error ( dual designation of station No., overlappeds Link area, etc.)
Self - diagnosis System ROM / RAM check, watchdog timer check, transfer loop back check
Transfer path specification Transfer path form Loop type
Cable length Between stations Max. 500m
Total extension Max. 1,000m
Error station processing Bypass system
Recommended cable 5D2V with shield or equivalent
Recommended connector 413631-1 (made by AMP) or equivalent
Internal Current consumpion 5V DC Approximately. 550mA
*1
No retentive area.
*2
This could be more in case peripheral devices access to CPU via link network.
*3
EH-LNK is supported by EH-CPU316A / 516 / 548.