IDEC High Performance Series - Manual (Page 1336)

2 HG2G-5F, HG3G/4G
34-20 WindO/I-NV2 User’s Manual
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Serial Interface (COM2)
• 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 (120Ω) between RDA and RDB.
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Expansion Module Interface (EXT)
IDEC MICROSmart expansion modules can be connected to the HG2G-5F, HG3G/4G.
HG2G: Up to two modules
HG3G/4G: Up to four modules
Refer to Chapter 29 “1.2 Applicable Expansion Modules” on page 29-2 for the types and the combination of the
expansion modules that can be installed.
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
1 SD OUT Send Data
RS232C
2 RD IN Receive Data
3 RS OUT Request to Send
4 CS IN Clear to Send
5 SG ― Signal Ground
RS485(422)
6 4W-SDA OUT Send Data (+) [4W]
7 4W-SDB OUT Send Data (-) [4W]
8 4W-RDA/2W-A IN/INOUT
Receive Data (+) [4W]/ Send and Receive Data
(+) [2W]
9 4W-RDB/2W-B IN/INOUT
Receive Data (-) [4W]/ Send and Receive Data (-)
[2W]
ON OFF