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SECTION 4
Digital I/O Units
This section provides the specifications and shows the components, terminal arrangements, wiring diagrams, and
dimensions for the Digital I/O Units.
4-1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
4-1-1 Specifications Shared by the Units . . . . . . . . . . . . . . . . . . . . . . . . . . 44
4-1-2 I/O Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
4-2 Status Area . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
4-2-1 Status Areas of Digital I/O Units . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
4-3 I/O Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
4-3-1 Wiring to the Screwless Clamping Terminal Block . . . . . . . . . . . . . 47
4-4 Functions of Digital I/O Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
4-4-1 I/O Power Supply Monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
4-4-2 Input Filter (Input Units Only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
4-4-3 Sensor Power ON Delay (Input Units Only) . . . . . . . . . . . . . . . . . . 52
4-4-4 Contact Operation Counter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
4-4-5 Total ON Time Monitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
4-4-6 Operation Time Monitor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
4-4-7 Output Hold/Clear Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
4-5 Maintenance Information Window . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
4-5-1 Checking Maintenance Information . . . . . . . . . . . . . . . . . . . . . . . . . 60
4-6 Digital I/O Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
4-6-1 Four-point DC Input Units: GRT1-ID4 (NPN) and GRT1-ID4-1 (PNP) 64
4-6-2 Four-point Transistor Output Units: GRT1-OD4 (NPN),
GRT1-OD4-1 (PNP), GRT1-OD4G-1 (PNP), GRT1-OD4G-3 (PNP) 67
4-6-3 Eight-point DC Input Units: GRT1-ID8 (NPN) and GRT1-ID8-1 (PNP) 73
4-6-4 Eight-point Transistor Output Units: GRT1-OD8 (NPN),
GRT1-OD8-1 (PNP), and GRT1-OD8G-1 (PNP) . . . . . . . . . . . . . . 79
4-6-5 Two-point Relay Output Unit: GRT1-ROS2 . . . . . . . . . . . . . . . . . . 84
4-6-6 Four-point AC Input Units: GRT1-IA4-1 and GRT1-IA4-2. . . . . . . 86
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