Yokogawa Value Series FX1000 - Manual (Page 261)

12-12
IM 04L21B01-01EN
Serial Communication Interface (/C2 and /C3)
Connecting to the RS-232 Connector (/C2)
2 1 3 4 5
6 7 9 8
2 RD (Received Data) Data received from the PC. Input signal to the FX.
3 SD (Send Data) Data transmitted to the PC. Output signal from the FX.
5 SG (Signal Ground) Signal ground.
7 RS (Request to Send) Handshaking signal when receiving data from the PC.
Output signal from the FX.
8 CS (Clear to Send) Handshaking signal when transmitting data to the PC.
Input signal to the FX.
* Pins 1, 4, 6, and 9 are not used.
(Male)
Connecting to the RS-422A/485 Connector (/C3)
FG (Frame Ground) Case ground of the FX
SG (Signal Ground) Signal ground
SDB (Send Data B) Send data B (+)
SDA (Send Data A) Send data A (–)
RDB (Received Data B) Receive data B (+)
RDA (Received Data A) Receive data A (–)
Two-wire system
FG SG SDB SDA RDB RDA
Electric potential of the shield
Four-wire system
Shield
FG SG SDB SDA RDB RDA
Recommended length of stripped wire: 9 mm. Recommended tightening torque: 0.4 to 0.5 N•m
Cable
There are two types of cables available: the four-wire cable and the two-wire cable, which is used only for the
Modbus protocol.
The cable must meet the following specifications.
• Type: Shielded twisted pair cable. 3 pairs, 24 AWG or more (four wire); 2 pairs, 24 AWG or
more (two wires).
• Characteristic impedance: 100Ω
• Capacitance: 50 pF/m
• Total cable length: Up to 1.2 km
Connecting to the USB Port (/USB1)
The USB port complies with USB revision 1.1.
The USB port is installed on the FX’s front panel.
Connecting to the Ethernet Port (/C7)
CAUTION
Do not connect an Ethernet cable whose plug does not comply with FCC
specifications. If you do, the FX may malfunction.
Ethernet port
Indicators
Checking the Connection and Communication Status
You can use the indicators that are located above the Ethernet port to check the
connection status of the Ethernet interface.
Indicator Connection Status of the Ethernet Interface
Illuminated (green) The Ethernet interface is electrically connected.
Blinking (red) Data is being transmitted.
Off The Ethernet interface is not electrically connected.
12.5 Optional Terminal Wiring