12.5 Specifications of Optional Functions

Alarm Output Relay (/A1, /A2, and /A3)

Item

Specifications

Operation

Outputs relay contact signals from the dedicated terminals on the rear panel when alarms occur.

Number of outputs

2 outputs (/A1), 4 outputs (/A2), 6 outputs (/A3)

Relay contact rating

250 VDC/0.1 A (for resistance load)

 

250 VAC (50/60 Hz)/3 A

Output format

NO-C-NC

Auxiliary functions

Energized/De-energized operation selectable (common to all relays)

 

Hold/Non-hold operation selectable (common to all relays)

 

AND/OR operation selectable

 

Reflash operation (Fixed to relay I01, I02, and I03. Relay release time is approx. 500 ms.)

Diagnosis output

Relay I01 can be used for diagnosis output.

 

Diagnosis output: Outputs a relay signal when an error in the recording section (plotter on the

 

pen model), a burnout, or an error in the A/D converter is detected. Relay operation is fixed to

 

de-energized and non-hold.

 

 

RS-422A/485 Communication Interface (/C3)

Item

Specifications

Connection

Complies with EIA RS-422A/485

Connection type

Multi-drop connection 1:32 (four-wire system), 1:31 (two-wire system, version 1.11 and later)

Transmission mode

Half-duplex

Synchronization

Start-stop synchronization

Baud rate

1200, 2400, 4800, 9600, 19200, or 38400 bps

Start bit

Fixed to 1 bit

Data length

7 bits or 8 bits

Stop bit

Fixed to 1 bit

Parity

Odd, even, or none (no parity)

Received buffer length

2047 bytes

Escape sequence

Open and close

Protocol

Dedicated protocol, Modbus slave protocol (version 1.11 and later)

Communication mode

ASCII for input/output for control and setting

 

ASCII or binary for input/output of measured data

Communication distance

1.2 km

 

 

Ethernet Communication Interface (/C7)

Item

Specifications

 

Function

 

 

Setting/Measurement server

Uses a dedicated protocol

 

Measured/computed data, setup data, status byte

Maintenance/Test server

Connection information, network statistics, etc.

Instrument information server

Model, serial number, etc.

Electrical and mechanical specifications

 

 

Conforms to IEEE 802.3.

Interface

Basic specifications

 

 

Connection

Ethernet (10BASE-T)

 

Protocol

TCP, IP, UDP, ICMP, and ARP

 

The maximum number of simultaneous connections and the number of simultaneous use

 

Function

Maximum Number of

Number of

 

 

 

Administrators

Connections Users

Simultaneous Users

Port Number

 

 

 

 

 

 

 

Setting/Measurement server

3

1

2

34260/tcp

 

 

 

 

 

 

 

Maintenance/Test server

1

1

1

34261/tcp

 

 

 

 

 

 

 

Instrument information server

-

-

-

34264/udp

Miscellaneous

 

 

 

 

 

 

 

 

 

 

User authentication

Administrator: 1, users: 6 (limitations placed on users)

 

 

 

Keepalive

Drops the connection if there is no response to an inspection packet. Use or not use is

 

selectable.

 

 

 

 

 

 

 

 

 

 

12

Specifications

12-13

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Omega RD100B manual Specifications of Optional Functions, Alarm Output Relay /A1, /A2, and /A3, Specifications 12-13