GE · PACSYSTEMS RX3i · INDUSTRIAL AUTOMATION
GE IC694BEM331
Genius Bus Controller · PACSystems RX3i
IC694BEM331 is the RX3i Genius Bus Controller used to connect the PACSystems control environment with Genius-based field networks. It handles Genius Global Data and datagrams, supports software-configurable bus rates, and provides electrical isolation between the communications interface and the controller environment. The controller is suited to systems that retain Genius I/O, VersaMax or Field Control I/O stations, and other Genius-capable devices while using an RX3i control platform.
TECHNICAL PROFILE
Core specifications & engineering details
| Module function |
Genius Bus Controller |
| Data exchange |
Global Data and datagrams |
| Message data length |
128 bytes per message |
| Configurable bus rates |
153.6 kbaud standard/extended; 76.8 kbaud; 38.4 kbaud |
| Maximum devices |
32 devices at supported rates except 38.4 kbaud; 16 devices at 38.4 kbaud |
| Bus topology |
Daisy-chained bus using twisted-pair plus shield or Twinax; fiber/modems can also be used |
| Electrical termination |
75, 100, 120 or 150 ohm resistor at both ends of the electrical bus |
| Maximum bus length |
Up to 7,800 ft at 38.4 kbaud; 4,500 ft at 76.8 kbaud; 3,500 ft at 153.6 kbaud extended; 2,000 ft at 153.6 kbaud standard |
| Isolation |
2000 V Hi-Pot; 1500 V transient common-mode rejection |
| Backplane current |
300 mA maximum at 5 Vdc |
| Diagnostics |
Advanced diagnostic capabilities |
| System role |
Genius master/controller interface for RX3i |
SYSTEM POSITION
RX3i communications path: controller → BEM331 → Genius field network
IC694BEM331 occupies a communications role rather than a conventional discrete or analog I/O role. It gives the RX3i system a Genius network interface for existing Genius devices. IC694BEM321 serves a different serial I/O-link role, while the newer IC695GCG001 is a gateway architecture that bridges PROFINET and Genius I/O. For a project retaining a Genius field layer, the BEM331's defining value is direct Genius bus control, configurable baud rate, datagram/global-data handling, and isolation.
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IC694BEM331
Genius Bus Controller · 128-byte messages · up to 32 devices except at 38.4 kbaud |
IC694BEM321
I/O Link master role; different protocol and application layer |
IC695GCG001
PROFINET-to-Genius gateway architecture |
RX3i CPU / I/O modules
Controller and process I/O functions; BEM331 provides the Genius network interface |
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PURCHASING QUESTIONS
Five buyer-focused FAQs for GE IC694BEM331
Is GE IC694BEM331 the right replacement when the project still has Genius field devices?
It is specifically intended to provide RX3i access to Genius networks. The purchasing check should focus on the existing Genius topology, node count, bus rate, termination, cable distance and required data exchange rather than treating it as a generic communications card.
How many Genius devices can GE IC694BEM331 support at the planned baud rate?
The specified maximum is 32 devices at the supported baud rates other than 38.4 kbaud; at 38.4 kbaud the maximum is 16 devices. Cable type and network design still have to satisfy the corresponding distance limits.
What cable and termination details matter when ordering GE IC694BEM331?
The Genius bus can use a daisy-chained twisted-pair cable with shield or Twinax, with fiber and modems also supported in appropriate arrangements. Electrical bus ends require the specified termination resistance of 75, 100, 120 or 150 ohms.
Can GE IC694BEM331 exchange more than simple cyclic I/O data?
Yes. The controller supports Genius Global Data and datagrams, with up to 128 bytes per message. That matters when the existing Genius network uses communications beyond straightforward discrete I/O exchange.
What should be checked when migrating a Genius network to GE IC694BEM331?
Confirm the Genius device addresses, selected baud rate, cable length, termination, node count, required data size, CPU/software compatibility and rack power budget. These checks prevent a communications-module replacement from becoming a network-topology problem.
Order protection: Please contact AMIKON within 7 days after receipt if an issue occurs. Returned items should remain in original condition and include the specific return reason. A return or replacement can be arranged after the returned item is received. Shipping costs arising from the return are the buyer's responsibility.
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