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

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.

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Specifications

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