ZT 4804 Rear Panel Transition Board

下載PDF

This 6U, single-slot, rear panel transition board with alarm outputs provides rear panel access to the I/O functions of a number of Performance Technologies single board computers (SBC), specifically the ZT 5503 and ZT 5551.

It is designed to function in the rear panel slot of several Performance Technologies 6U CompactPCI® systems and enclosures, providing interfaces for two user inputs and six alarm relay outputs.

The ZT 4804 allows for efficient troubleshooting and servicing of a system without disruption of the CPU board. All cabling is managed via the transition board, thus enhancing the reliability and availability of the system while running diagnostics or conducting maintenance.

Highlights

• Dual RJ-45 Ethernet A and B channels
• Dual (MDSM) DB-9 serial connectors
• Two jumper-selectable user inputs
• Host hot-swap activation via bottom ejector latch circuitry
• Internal floppy and IDE interfaces
• Rear panel switches for alarming, reset and hot-swap initiate

Key Design Elements

Ethernet

The ZT 4804 transitions an SBC's Ethernet channels A and B for rear panel access. Both 10 Mbit/s and 100 Mbit/s Ethernet protocols are provided through each of two RJ-45 rear panel connectors. (Note: Ethernet channel B is not accessible to the rear panel in a high availability system due to the fact that it is bused to the redundant processor board, through backplane connector J5, as an inter-processor communications channel.)

SMBus

Access to alarm and system monitoring functions is provided by incorporating an SMBus interface to the processor board, providing isolation of the local SMBus from the processor board, however, during hot-swap cycles. All SMBus devices are accessed via a unique device driver. SMBus implementation provides two 8-bit registers for I/O and control functions.

Input/Output

Two optically-isolated debounced inputs are provided for application use. The inputs must be biased from an external source and are configurable through jumpers to sense either 0-5VDC or 0-60VDC input levels. Reverse polarity and overvoltage protection are provided.

These inputs are available as rear panel inputs only; no provision is made for front panel connections. The ZT 4804 provides six alarm relay outputs, allowing configuration of the output pin pair as either a normally-open or normally-closed pole, through jumpers.

Two serial port connectors, J2 and J4, provide an alternative means of accessing COM1 and COM2 serial ports, respectively. Additionally, the ZT 4804 provides access to a processor board's secondary EIDE channel and floppy controller through internal connectors. A PS/2-style keyboard connector can be used in lieu of the connector on the host SBC. The ZT 4804 also supports a PS/2-style mouse port.

Alarm Cut Off (ACO) and reset push-button switches are provided, along with an ejector-sense mechanism for triggering a hot-swap event. LEDs indicate floppy access, IDE access, ACO, Alarm Conditions (critical, major, minor) and hot-swap removal of the ZT 4804.

Warranty

One year

Specifications

Each ZT 4804 relay output offers a normally-open and normally-closed pole position, and has the following maximum contact ratings:

• Rated Resistive Load: 0.4 A @ 125 V AC, 2.0 A @ 30 V DC
• Rated Inductive Load: 0.2 A @ 125 V AC, 1.0 A @ 30 V DC
• Operating Voltage: 250 V AC, 220 V DC
• Operating Current: 3.0 A (AC resistive), 3.0 A (DC resistive), 1.5 A (AC inductive), 1.5 A (DC inductive)
• Switching Capacity: 50 VA, 60 W (resistive), 25 AV, 30 W (inductive)
• Minimum Load: 10 uA at 10 mV DC