NOTE: Due to the unavailability of essential parts, SNAP PAC EB-series brains have reached their end of life as of March 1, 2022. Instead, use a SNAP-PAC-R1 controller/brain; it has all the same features plus additional power (and programmability, if you need it).
The SNAP-PAC-EB2 brain is an I/O and communications processor for your control system. Designed primarily to work in distributed systems controlled by a SNAP PAC S-series or R-series controller, the SNAP-PAC-EB2 can also be controlled by a groov EPIC processor
or used as intelligent remote I/O with Allen-Bradley industrial PLC systems. The SNAP-PAC-EB2 provides local intelligence that frees the controller (PAC, EPIC, or PLC) for supervisory tasks.
As an I/O processor, the SNAP PAC brain independently handles functions such as latching, thermocouple linearization, watchdog timers, and PID loop control. These functions continue to work on the brain even if communication with the SNAP PAC controller is lost.
The SNAP-PAC-EB2 brain supports all the SNAP I/O analog, digital, and serial input and output modules available on the Opto 22 website. These modules can all be mixed on the same mounting rack and placed in any position on the rack. The brain and modules mount on a SNAP PAC rack
, which holds up to 4, 8, 12, or 16 modules.
NOTE: In order to use Opto 22 serial modules with an EB2 brain, the I/O should be controlled by a SNAP PAC controller or groov
EPIC processor running a PAC Control strategy.
In addition to I/O processing, the SNAP PAC brain communicates over a standard 10/100 Mbps Ethernet network. The brain is equipped with two switched Ethernet network interfaces. Because these interfaces share a single IP address and act just like an Ethernet switch, SNAP PAC brains can be installed in a multi-drop (daisy-chain) configuration, extending the control network without the added expense of additional Ethernet network hardware. SNAP PAC brains can also be installed in a star configuration using standard, off-the-shelf Ethernet network components.
The SNAP-PAC-EB2 brain supports communication using multiple protocols running simultaneously over Ethernet. Most customers use the PAC Project software suite for control, monitoring, and data acquisition. At the same time, you can communicate using other methods, including EtherNet/IP, Modbus/TCP, SNMP, SMTP, FTP, and OptoMMP. Communication with OPC 2.0-compliant clients is available through OptoOPCServer. Additional programming options are available when the EB is used with a groov
The SNAP-PAC-EB2 brain provides basic digital functions but does not offer high-speed digital functions; if you need high-speed counting (up to 20 KHz depending on the module), quadrature counting, pulse measurement, and frequency and period measurement, choose the SNAP-PAC-EB1
brain instead. For a complete list of features and specifications, see form #1689, the SNAP PAC Brains Data Sheet, under the Docs & Downloads tab.
Compare SNAP PAC controllers and brains
If you are not using PAC Project software and a SNAP PAC controller or groov
EPIC processor with this brain and instead need to communicate directly with it, see the SNAP PAC .NET OptoMMP SDK
Build your system in the SNAP I/O Configurator