GRT1-ID4-1 Omron

GRT1-ID4-1 Omron servo encoder cable

Brand：OMRON Model number：GRT1-ID4-1

Country of origin: Japan Product weight：0.55kg

HS code：8538900000

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Product Details：

Product Dimensions：

The GRT1-ID4-1 is a compact, slice-type I/O module that features 4 digital inputs. The "-1" in the model suffix indicates that this specific unit uses PNP (Source) logic, meaning the input is activated when a positive voltage is applied to the signal terminal. One of the hallmark features of the SmartSlice series is its tool-less assembly; the units snap together on a DIN rail and use a bus connector to share power and data automatically. It also includes "Smart" functions that monitor the operating time and status of the connected sensors, providing preventative maintenance data before a failure occurs.

Product Parameters

Input Type: Digital / Discrete
Number of Inputs: 4 points
Input Logic: PNP (Source type)
ON Voltage: $15 \text{ VDC}$ minimum (between input terminal and G terminal)
OFF Voltage: $5 \text{ VDC}$ maximum
OFF Current: $1 \text{ mA}$ maximum
Input Impedance: Approximately $4.4 \text{ k}\Omega$
ON/OFF Delay: $1.5 \text{ ms}$ maximum (High-speed response)
Internal Current Consumption: $80 \text{ mA}$ maximum (from the SmartSlice bus)
Terminals: Push-in Plus technology (Screwless clamp terminals)
Indicators: 4 yellow LEDs for input status and 1 green/red TS (Terminal Status) LED
Isolation: Photocoupler isolation between the internal bus and the input circuits

Product Advantages

A primary advantage of the GRT1-ID4-1 is its Screwless Push-In Plus Terminals, which significantly reduce wiring time and ensure a vibration-resistant connection that never requires retightening. The Ultra-Slim Profile (only $13 \text{ mm}$ wide) allows for a high density of I/O points in extremely tight cabinet spaces.

The module also features Hot-Swapping Capabilities, meaning a slice can be replaced while the rest of the I/O system remains powered and communicating, which is vital for minimizing downtime in continuous production lines. Furthermore, the Integrated Smart Functions monitor the ON/OFF cycle counts of the connected sensors, allowing the system to alert the operator when a sensor is reaching the end of its expected life cycle.

Important Considerations and Precautions

When installing the GRT1-ID4-1, ensure that the Total Power Consumption of the slice I/O bank does not exceed the capacity of the Communication Head; if the total current draw is too high, a GRT1-PD2 or PD8 power supply expansion unit must be added to the lineup. Because this module uses PNP Logic, it is incompatible with NPN-style sensors; using the wrong sensor type will result in the input failing to trigger.

During wiring, ensure that the Sensor Power Supply is correctly distributed through the common terminals provided on the slice or the base block to avoid complex "daisy-chain" wiring. It is also important to note that the TS LED will flash red if there is a communication error between the slice and the head unit; in this case, check that the slices are firmly clicked together. Finally, always maintain a clean environment, as the IP20 Rating means the unit is sensitive to conductive dust and liquid splashes.

Product Applications

The Omron GRT1-ID4-1 is widely used in modular machine designs where decentralized I/O is preferred.

Packaging Machinery: Collecting signals from proximity sensors and photoeyes on various sections of a conveyor or wrapping station.
Semiconductor Equipment: Used in cleanroom tools where space is at a premium and reliable, high-speed input response is necessary.
Assembly Robots: Mounted on or near the robot arm's control box to handle end-of-arm-tooling sensors.
Food and Beverage: Utilized in control panels for bottling lines to monitor valve positions and bottle presence.
Automated Warehousing: Interfacing with limit switches and optical sensors on shuttle systems and sorters.

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