Real-time control execution with five Ethernet paths
IS420UCSBH4A is a UCSB embedded industrial controller for compatible Mark VIe control arrangements. It executes application-specific control code under the QNX Neutrino real-time operating system and exchanges plant, peer and distributed I/O traffic through separate Ethernet paths. The H4A hardware uses an Intel EP80579 processor running at 1066 MHz, with 256 MB DDR2 memory with ECC and 2 GB NAND flash storage.
CONTROL NODE
UCSB
Core Technical Profile
Processor
Intel EP80579, 1066 MHz
Memory
256 MB DDR2 with ECC
Storage
2 GB NAND flash
Control network
2 × 10/100BASE-TX UDH/CDH ports
I/O network
3 × 10/100BASE-TX IONet ports
Operating system
QNX Neutrino
Supply
28 VDC nominal; 27.4–28.6 VDC
Input current
1.1 A maximum
Power demand
17.3 W typical; 28.7 W maximum
Ambient
-30°C to +65°C
Cooling
Fanless convection
Battery
Not required
ENGINEERING VIEW
Deterministic Processing and Network Separation
Control execution The controller runs scheduled application logic, sequencing, regulation and protection functions at the frame rate established by the engineered project. Hardware replacement does not replace the need to restore the correct application, controller identity and network settings.
Five-port architecture Two Ethernet ports serve UDH/CDH control-network communication, while three independent IONet ports connect distributed I/O. The physical port assignment must follow the installed network topology, especially in redundant arrangements.
Power and heat Provide a stable 28 VDC supply within 27.4–28.6 VDC. Cabinet design must support the maximum 1.1 A input and unobstructed convection around the fanless controller.
Memory integrity ECC-protected DDR2 memory supports runtime integrity. NAND flash holds controller software and persistent content, so revision and project compatibility must be checked before commissioning.
Status validation After installation, confirm power, boot, online, diagnostic and Ethernet link states. Then validate IONet communication, peer exchange, time synchronization and controlled-process response.
Replacement boundary Do not treat UCSBH1A, UCSBH3A and UCSBH4A as automatic equivalents. Processor type, supported release, power behavior and environmental limits differ by hardware suffix.
Need exact-match support for IS420UCSBH4A? Send the installed code, hardware arrangement, system release, quantity and destination for a focused quotation.
Compatibility depends on the complete assembly: hardware suffix, connected boards, network or backplane path, configured software release and the active plant application must be evaluated together.
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Return coordination Contact us within seven days after receipt if an issue is found.
Condition requirement Keep the unit in its original condition and provide the specific reason for return review.
Freight responsibility Return-related shipping cost is borne by the buyer.
PURCHASING QUESTIONS
IS420UCSBH4A FAQ
01
Can IS420UCSBH4A replace IS420UCSBH1A or IS420UCSBH3A directly? Not solely by matching the enclosure. Confirm the supported ControlST release, processor variant, controller redundancy set, network configuration and application compatibility.
02
What should be preserved before replacing IS420UCSBH4A? Preserve the validated application, controller identity, IP assignments, IONet topology, firmware level and current diagnostic state before the outage.
03
What electrical check is essential for IS420UCSBH4A? Verify a stable 28 VDC supply within 27.4–28.6 VDC and ensure the circuit can support up to 1.1 A without excessive voltage drop.
04
Does IS420UCSBH4A require a cooling fan or battery? No. The H4A uses fanless convection cooling and does not require a battery. Cabinet airflow and ambient temperature still remain critical.
05
Which network ports must be checked after IS420UCSBH4A installation? Check both UDH/CDH control-network ports and all three IONet ports used by the project, then confirm peer, HMI, engineering and distributed-I/O communication.
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Customer Support
IPv6 network supported