The Siemens 6ES7148-6JJ00-0BB0 is a communications module in the SIMATIC ET 200eco PN family that combines 8 IO-Link master ports with 8 individually configurable digital I/O channels in a compact IP65/IP67/IP69K field-mountable housing. With multi-fieldbus capability — PROFINET IO, EtherNet/IP, and Modbus TCP — it integrates IO-Link devices including sensors, actuators, and valve terminals into any of the three major industrial Ethernet protocols without additional gateway hardware.

How does this 8-port IO-Link master compare to the 4-port variant (6JE00)?

The key trade-off is IO-Link port count versus general-purpose I/O. The 6ES7148-6JJ00-0BB0 offers 8 IO-Link Class A ports with 8 configurable DIQ channels at 0.5 A each — ideal when your fieldbus station needs to connect many IO-Link devices. The 6ES7148-6JE00-0BB0 provides 4 IO-Link ports but doubles the DIQ count to 12 channels with selectable 0.5 A or 2 A output — better suited when you have fewer IO-Link devices but more standard digital sensors and actuators. Both share the same mechanical footprint (45 x 200 x 48 mm) and multi-fieldbus capability.

What does Class A port type mean for device compatibility?

Class A IO-Link ports use a 3-wire connection (pins 1, 3, 4 on the M12 connector) supplying 24 V DC encoder power and carrying the IO-Link communication signal. This covers the vast majority of IO-Link sensors and simple actuators. For IO-Link devices requiring a separate galvanically isolated auxiliary supply — such as valve terminals or high-power actuators — a Class B port is needed. If your application includes Class B devices, consider the 6ES7148-6JG00-0BB0 variant which offers 4 Class A plus 4 Class B ports.

Frequently Asked Questions

Can this module operate without a PROFINET controller?

Yes. The multi-fieldbus capability means the module can be commissioned on EtherNet/IP or Modbus TCP networks in addition to PROFINET. Shared Device functionality allows up to 2 controllers to access the module simultaneously on PROFINET. S2 system redundancy and MRP are also supported for high-availability applications.

What is the minimum I/O update rate?

The minimum cycle time is 2 ms for IO-Link ports, with IRT (Isochronous Real Time) support from 250 μs to 4 ms on the PROFINET side. The module supports up to 300 bytes of address space per station with 2 ms I/O request intervals.

Is this module suitable for safety-related applications?

While the module itself is not a safety-rated device, its output channels can be safely shut down via the load voltage disconnect path up to SIL 2 (IEC 62061) or PL d (ISO 13849-1) when used with an external safety relay controlling the 2L+ supply.