Yokogawa ALR121-S51 S1 Serial Communication Module

Model/Part Number

ALR121-S51 S1

Description

Serial Communication Module (RS-422/RS-485, 2 Ports)

Interface

RS-422/RS-485 (4-wire system)

Connection Method

Point-to-Point (RS-422)  Multipoint (RS-485)

Communication Function

Half-Duplex

Synchronization Method

Start-Stop Synchronization

Transmission Speed

1200 / 2400 / 4800 / 9600 / 19200 / 38400 bps

Transmission Code

Binary

Character Length

8 Bits (Fixed to 8-bit on Modbus Slave Communication and Subsystem Communication)

Stop Bit Length

1/2 Bits (Fixed to 1-bit on Subsystem Communication)

Parity Check

None / Even / Odd

Lag Time After Data Transmission

1 ms

Transmission Distance

Maximum 1200 m (Total Extended Length)

Installation Method

Mounted on SSC60, SSC50, SSC57, SSC10, or SNB10D (*1)

I/O Wiring

Cable with 3-pair shield, AKB161, or AKB162

Wiring Connection

Clamped with Terminal Block’s M4 Screws (5 poles × 2 ports)

Communication Function (*2)

Modbus Slave Communication, Subsystem Communication

Current Consumption

0.5 A

Weight

Approx. 0.34 kg

-S

Standard Type

5

No Explosion Protection

E

With Explosion Protection

1

With ISA Standard G3

3

With ISA Standard G3 and Temperature Option