Yokogawa ALR111-S50 CENTUM VP Serial Communication Module

Availability: 20 left in stock

Yokogawa ALR111-S50 CENTUM VP Serial Communication Module The Yokogawa ALR111-S50, also cataloged as the ALR111 Serial Communication Module, operates as...

SKU: ALR111

Manufacturer: Yokogawa
Product No.: ALR111
Product Type: Serial Communication Modules
Product Origin: JAPAN
Payment:T/T, Western Union
Weight: 400g
Shipping port: Xiamen
Warranty: 12 months

Description Reviews

Yokogawa ALR111-S50 CENTUM VP Serial Communication Module

The Yokogawa ALR111-S50, also cataloged as the ALR111 Serial Communication Module, operates as a dedicated hardware component for half-duplex point-to-point serial data transfer within CENTUM VP and FA-M3 control system networks.

Suffix Breakdown & Model Matrix

Code	Option / Specification	Description
ALR111	Base Model	Serial Communication Module (RS-232C, 2-port)
-S	Standard Type	Standard functional specification
5	Explosion Protection	With no explosion protection
0	Basic Type	Basic configuration type

Hardware Specifications

Parameter	Specification
Model	ALR111-S50
Brand	Yokogawa
Origin	Japan
Weight	0.40 kg (Net), 2.0 kg (Shipping)
Dimensions	Standard rack-mounted I/O slot enclosure
Operating Temp	-20 to +60 deg C
Power Consumption	0.6 A @ 5 VDC (Internal backplane)
Physical Interface	RS-232C, 2 Ports
Communication Topology	Point-to-point
Transmission Mode	Half-duplex, Start-stop synchronization
Transmission Speeds	1200, 2400, 4800, 9600, 19200, 38400 bps
Data Encoding	ASCII or Binary
Framing Format	7 or 8 data bits, 1 or 2 stop bits, Parity: None / Even / Odd
Transmission Distance	Maximum 15 m
Post-Transmission Lag	1 ms

Process Control and DCS Connectivity

Configured for Yokogawa CENTUM VP field control stations (FCS), the ALR111-S50 module executes serial subsystem integration across subsystem gateways and field devices. Integrated channel-to-channel isolation protects internal control station backplanes from field-side voltage transients and ground loops. The interface module processes RS-232C point-to-point telemetry streams and aligns them with higher-level DCS database architectures, maintaining signal integrity alongside 4-20 mA HART and FOUNDATION Fieldbus field instruments.

Frequently Asked Questions

Q: What is the maximum transmission distance and supported baud rate for the ALR111-S50?

A: The ALR111-S50 supports RS-232C point-to-point serial links up to 15 m at configurable speeds of 1200, 2400, 4800, 9600, 19200, and 38400 bps.

Q: How does the module handle timing between data packet transmissions?

A: The hardware incorporates a fixed 1 ms post-transmission lag time during half-duplex operation to clear interface buffers and prevent data collisions during direction switching.

Field Installation Guidelines

Mount the ALR111-S50 module vertically into the dedicated slot of the field control unit or node unit, ensuring complete engagement with the backplane connector. Verify that total cable lengths do not exceed 15 m. Route RS-232C signal cables through dedicated low-voltage instrument raceways away from AC power lines or variable frequency drive cables. Ground cable shields at a single chassis point to suppress high-frequency electromagnetic interference.

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