KEYENCE IG Series - Manual (Page 27)

2-1 Mounting and Wiring the Sensor Amplifier
2-5 IG-E
2
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Panel mount type, expansion unit (IG-1550)
Several expansion units can be used in connection with the main unit. Up to 3 expansion
units can be connected to one main unit.
1
Make holes on the panel to attach according to the number of amplifiers
(connected expansion units).
For the panel cutting size, refer to the "Panel mount type, main unit".
2
Install the amplifiers (expansion units) on the panel.
For the amplifier mounting method, refer to the "Panel mount type, main unit".
3
Connect the amplifier (main unit) and amplifier (expansion unit) using the
expansion cable (50 mm) supplied with the expansion unit.
The expansion unit additionally installed next to the main unit is referred to as
expansion unit 1. Subsequent expansion units are referred to as expansion unit 2,
expansion unit 3, etc.
CAUTION
• Turn OFF the power before connecting the expansion
cable. Inserting or removing the cable with the power
turned on may cause damage to the units.
• Be sure to completely connect the expansion cable.
Improper connections may damage the equipment.
Note • When connecting the expansion units, make sure to initialize the
connected expansion units and set the output polarity.
(1) When turning on the amplifier for the first time after connecting the sensor head
"3-1 Operation When the Power is Turned on for the First Time" (page 3-2)
(2) When performing the initial reset
"3-5 Initial Reset (Initialize)" (page 3-10)
• Expansion units with different setting of output polarity (such as an NPN output
expansion unit to a PNP output main unit) cannot be connected together.
• Expansion units of panel mount type cannot be connected to the
main unit of DIN rail mount type.
Reference When arranging the amplifiers side by side, the expansion cable of 300 mm
(OP-35361) is necessary.
Expansion cable
Main unit
Expansion unit 1