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・ Make sure to turn off the power to the HG2G before attaching the O/I link unit or replacing
the internal battery. Do not touch the printed circuit board in the HG2G and other devices.
Otherwise, failure of the HG2G and other devices may be caused.
・ Hold the connector when disconnecting the maintenance cable from serial interface 2. Do
not pull the maintenance cable.
8
Interface
・ Make sure to turn off the power to the HG2G before wiring each interface or switching the
terminating resistor selector SW.
●Serial interface 1
Serial interface 1 is used for host communication (RS232C or RS422/485).
・Use applicable cables for wiring.
Applicable cable
AWG20 to AWG22
AI 0,34-8 TQ
Recommended
AI 0,5-8 WH
Pressure Terminal
AI-TW N 2 x 0,5-8 WH
(Phoenix Contact)
Tightening Torque
0 22 to 0.25 N･m
No.
Name
I/O
1
SD
OUT
2
RD
N
3
RS
OUT
4
CS
N
5
SG
-
6
SDA
OUT
7
SDB
OUT
8
RDA
N
9
RDB
N
・Note that only one of the RS232C or RS422/485 interfaces can be used at one time.
・Wiring both interfaces will result in failure of the HG2G. Wire only the interface used.
・Terminating Resistor Selector Switch (for RS422/485 interface)
OFF
When using RS422/485 interface, set the Terminating Resistor Selector SW to the ON side.
This will connect the internal terminating resistor (100Ω) between RDA and RDB.
●
Serial interface 2
Serial interface 2 is used for maintenance communication (RS232C).
７
８
５
２
No.
Name
1
RS
2
ER
3
SD
4
RD
5
DR
6
EN
7
SG
8
NC
Do not connect pin 6 (EN) with any other pins except when performing maintenance
communications for downloading project data.
●O/I Link interface (Option)
Method
Dedicated Interface to O/I Link Unit
Connector
Dedicated connector
The HG2G Operator Interface can be connected to an O/I Link Unit for 1:N communication with
a PLC. This allows high-speed communication with the PLC host.
Communication
Function
type
Send Data
Receive Data
Request to Send
Clear to Send
Signal Ground
Send Data (+)
Send Data (-)
Receive Data (+)
Receive Data (-)
ON
６
３
４
１
I/O
Function
OUT
Request to Send
OUT
Data Terminal Ready
OUT
Send Data
N
Receive Data
N
Data Set Ready
N
Cable Recognition
-
Signal Ground
-
No Connection
●Ethernet interface
EEE802.3 standard compliant (10/100Base-T)
No.
Name
1
TPO+
2
TPO-
3
TPI+
4
NC
5
NC
6
TPI-
7
NC
8
NC
9
Replacing the Backlight
The HG2G's backlight cannot be replaced by the customer. When the backlight needs to be
replaced, Contact IDEC.
10
Replacing the Backup Battery
A backup battery is built into the HG2G to retain the internal backup data (log data, keep resister,
and keep relay) and clock data.
When the "Replace the battery" message is displayed, replace the backup battery by following the
procedure below.
When the "Battery level LOW" message is displayed, replace the battery immediately; otherwise,
the backup data and clock data may be lost.
Whether or not to display the reminder message for battery replacement can be specified with the
configuration software. Refer to the Instruction Manual for details.
(1)
Turn off the power to the HG2G and disconnect the cable.
(2)
Remove the battery holder cover.
(3)
Turn on the power to the HG2G, wait for approximately one minute, and then turn off the
power again.
・ After turning off the power to the HG2G in step (3), complete the steps through (5) within 30
seconds to replace the battery without losing the backup data and clock data. However, it is
recommended that the backup data be transferred to flash memory as a precautionary measure.
For the procedure to transfer the data to flash memory, refer to the Instruction Manual. If it is not
necessary to save the data, step (3) can be skipped.
(4)
Insert a flathead screwdriver into the battery holder as shown in the figure, and remove the
battery. The battery may pop out from the battery holder.
(5)
Put a new replacement battery into the battery holder.
(6)
Replace the battery holder cover into the original position. Replace the battery holder cover
on the HG2G, and turn it clockwise to lock the cover.
3
/O
Function
OUT
Send Data (+)
OUT
Send Data (-)
IN
Receive Data (+)
-
No Connection
-
No Connection
IN
Receive Data (-)
-
No Connection
-
No Connection
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