Manual

1 HG2G-S/-5S
34-4 WindO/I-NV2 User’s Manual
1.4
External Interfaces
● Serial Interface 1
• Terminating Resistor Selector Switch (for RS485(422) interface)
When using RS485(422) interface, set the Terminating Resistor Selector Switch to the ON side. This will connect the
internal terminating resistor (100Ω) between RDA and RDB.
CAUTION
• Make sure to turn off the power to the HG2G-S/-5S before wiring each interface or switching the
terminating resistor selector Switch.
• Note that only one of the RS232C or RS485(422) interfaces can be used at one time. Wiring both
interfaces will result in failure of the HG2G-S/-5S. Wire only the interface used.
Interface Specification RS232C/485(422)
Connector Detachable Terminal Block 9 pin
Applicable cable AWG16 to AWG28
Recommended Pressure Terminal
AI 0.25-6 BU
AI 0.34-6 TQ
AI 0.5-8 WH
AI 0.75-8 GY
AI 1-8 RD
(Phoenix Contact)
Tightening Torque 0.22 to 0.25 N·m
No. Name I/O Function Communication type
1SD OUT Send Data
RS232C
2 RD IN Receive Data
3 RS OUT Request to Send
4CS IN Clear to Send
5 SG - Signal Ground
RS485(422)
6 SDA OUT Send Data (+)
7 SDB OUT Send Data (-)
8 RDA IN Receive Data (+)
9 RDB IN Receive Data (-)