YOKOGAWA ALR121-S51 Serial Communication Model

YOKOGAWA Serial Communication

item no.:
ALR121-S51
lead time:
2-3days
product orgin:
JAPAN
payment:
T/T
Condition:
new

product details

ALR121-S51 HARDWARE SPECIFICATIONS

Model：ALR121
Interface: RS-422/RS-485
Connection method：Point-to-point (RS-422)，Multipoint (RS-485)
Communication function: Half-duplex
Synchronization method：Start-stop synchronization
Character length: 7/8 bits
Stop bit length：1/2 bits
Parity check: None/even/odd
Transmission distance: Maximum 1200 m (total extended length)
I/O wiring：Cable with 3-pair shield, AKB161, or AKB162
Weight: 0.3 kg

ALR121-S51 SUBSYSTEM COMMUNICATIONS

The serial communication module communicates with subsystems at the specified intervals and stores the subsystem
data in the communication modules’ I/O image area. FCS accesses the communication module asynchronously from
them, and refers to or sets the I/O images. This enables FCS to use the subsystem data through the I/O terminals of
the function block in the same way as the general analog and digital I/O signals.

ALR121-S51 COMMUNICATION FUNCTIONS

FA-M3 Communication

Connected device: Personal computer link module
F3LC11-1N, F3LC11-2N (FA-M3)
LC01-0N, LC02-0N (FA500)
Connection method: Connect a personal computer link module with ALR111 or ALR121 communication port.
Applicable device: FA-M3, FA500
Transmission protocol: FA-M3 dedicated control protocol
No. of subsystem stations: Max. 30 stations/port

ALR121-S51 YS Communication with Direct Connection

Connected device: YS instruments (YS1000 SERIES and YS100 SERIES)
Connection method: ALR121 communication port is connected with YS instruments via RS-485 cable.

ALR121-S51 Functional Overview

When the communication function complies, the dual-redundant configuration (*1) can be provided by setting the serial communication modules to dual-redundant.
Each of the ALR111 and ALR121 modules has two ports; however, the dual-redundant communication requires two communication modules.
The two sets of dual-redundant communication are enabled by two ports of ALR111/ALR121; however, the communication control is defined by each communication module. When one of the communication ports detects an error, both ports switch over the control/stand-by sides to the redundant module.
Note that the one-shot write specification cannot be used when dual-redundant communication is set.