Yokogawa DR240 - Manual (Page 244)

14-17 IM DR231-01E
Specifications
14
RS-422-A/RS-485 Communication (when equipped with /C3)
Electrical & mechanical specs
Conform to the EIA RS-422-A and EIA RS-485 Standard
Connection format
Multi-drop 1:n (n=16 for RS-422-A, n=31 for RS-485)
Communication format
Half duplex
Synchronizing format
Start-stop asynchronous transmission (synchronized by start/stop bit)
Baud rate (bps)
300, 600, 1200, 2400, 4800, 9600, 19200, 38400 (selectable)
START bit
1 bit (fixed)
Data length
Either 7 or 8 bits (selectable)
Parity
Even, Odd, or None (selectable)
STOP bit
Either 1 or 2 bits (selectable)
Connector
6 point screw type terminal (uses M4 screws)
Minimum response time
0, 10, 20, 50 or 100 ms (selectable)
Reception buffer length
250 bytes
Escape sequence
Trigger, Status call, Open and Close
Electrical characteristics
SDA, SDB, RDA, RDB, SG. Between the signal terminal and the main internal circuit is
insulated functionally.
Communication distance
1.2 km maximum
Terminator
Internal resistor (120 ohm, 1W) switch with the slide switch
Ethernet (when equipped with /C7)
Electrical and Mechanical specifications
Conforms to IEEE802.3 (Frames are not supported.)
Communication method
Ethernet
Transmission specifications
10BASE-T (CSMA/CD, 10 Mbps, Baseband)
Transmission speed
10 Mbps
Protocols
TCP, IP, UDP, ARP, ICMP
Maximum number of connections
4
Input data
ASCII
Supporting RS-232-C commands
Output data
ASCII, Binary
14.2 Specifications of Optional Functions