Smart Star User's Manual

> ## 6. Smart Star Specifications

> This chapter provides the specifications for the Smart Star backplane and CPU card, and describes the conformal coating.

> ### 6.1 Electrical and Mechanical Specifications

> #### 6.1.1 Smart Star Backplane

> Figure 19 shows the mechanical dimensions for the two Smart Star backplanes.

> Figure 19. Smart Star Backplane Dimensions

> NOTE | All diagram and graphic measurements are in inches followed by millimeters enclosed in parentheses.

> Table 3 lists the electrical, mechanical, and environmental specifications for the Smart Star backplanes.

> Table 3. Smart Star Backplane Specifications
> Parameter | Specification
> SR9010 | SR9050
> Board Size | 6.50" × 4.20" × 0.75" (165 mm × 107 mm × 19 mm) | 3.75" × 4.40" × 0.75" (95 mm × 112 mm × 19 mm)
> Connectors | one 2 × 26 (CPU card slot), 2 mm seven 2 × 13 (I/O card slots), 2 mm | one 2 × 26 (CPU card slot), 2 mm three 2 × 13 (I/O card slots), 2 mm
> Slot Select | Each slot has a predefined dedicated set of addresses (see Appendix E and the software chapters in the individual I/O card manuals)
> Temperature | -40°C to +70°C
> Humidity | 5% to 95%, noncondensing
> External Input Voltage | 9 V to 30 V DC at 1 A typical for onboard +5 V regulated supply; provision for independent 9 V to 30 V DC (V_USER) voltage source for I/O cards--the exact voltage for the second supply depends on the requirements of the specific I/O cards used (Z-World recommends tying V_USER to +RAW unless there is a specific need for an independent power supply)
> Onboard Voltage Regulator | Surface-mount switching regulator sources 5 V at 1 A
> Data Lines | Buffered bidrirectional data lines (D0-D7)
> Address Lines | Buffered address lines (A0-A3)
> Read/Write Control | Buffered IORD, IOWR
> Reset | I/O cards and CPU card can be reset independently

> #### 6.1.2 CPU Card

> Figure 20 shows the mechanical dimensions for the CPU cards.

> Figure 20. CPU Card Dimensions

> Table 4 lists the electrical, mechanical, and environmental specifications for the CPU card.

> Table 4. CPU Card Specifications
> Parameter | Specification
> Board Size (with optional backup battery board) | 4.00" × 3.12" × 1.00" (102 mm × 79.2 mm × 25.4 mm)
> Connectors | one RJ-45 (Ethernet) (SR9150 only) one 2 × 5, 2 mm pitch (serial programming port) one 0.9 mm × 0.5 screw-terminal connector strips (accept 14-30 AWG or 0.05-1.5 mm² wire)
> Ethernet Interface (SR9150 only) | Direct connection to 10Base-T Ethernet networks via RJ-45 connection
> Temperature | -40°C to +70°C
> Humidity | 5% to 95%, noncondensing
> Input Voltage | 5 V DC at 190 mA typical
> Microprocessor | Rabbit 2000TM
> Clock | 22.1 MHz
> SRAM | 128K, surface mounted, 512K option
> Flash EPROM | 2 × 256K, surface mounted
> Timers | Five 8-bit timers cascadable in pairs, one 10-bit timer with 2 match registers that each have an interrupt
> Serial Ports | Three serial ports: · one CMOS-compatible programming port · remaining ports software-configurable as two 3-wire RS-232, one 5-wire RS-232, or one 3-wire RS-232/ one RS-485
> Serial Rate | Selected baud rates up to 115, 200 bps CMOS-compatible port supports up to 6.45 Mbps (synchronous)
> Watchdog/Supervisor | Yes
> Time/Date Clock | Yes
> Expansion Port | Supports up to 7 I/O cards
> Backup Battery | Yes: Panasonic CR2330 or equivalent 3 V lithium coin type, 265 mA·h standard using onboard battery holder; provision for external battery

> ### 6.2 Jumper Configurations

> Figure 21 shows the header locations used to configure the various CPU card options via jumpers.

> Figure 21. Location of Smart Star CPU Card Configurable Positions

> Table 5 lists the configuration options.

> Table 5. Smart Star CPU Card Jumper Configurations
> Header | Description | Pins Connected | Factory Default
> JP1 | RS-485 Bias and Termination Resistors | 1-2 5-6 | Bias and termination resistors connected | ×
> 1-3 4-6 | Bias and termination resistors not connected1 |
> JP2 | U5 Flash Memory Size | 1-2 | 128K/256K | ×
> 2-3 | 512K |
> JP3 | SRAM Size | 1-2 | 128K | ×
> 2-3 | 512K |
> JP4 | U11 Flash Memory Size | 1-2 | 128K/256K | ×
> 2-3 | 512K |
> JP5 | Flash Memory Bank Select | 1-2 | Normal Mode | ×
> 2-3 | Bank Mode |

> 1 Although pins 1-3 and 4-6 of header JP1 are shown "jumpered" for the termination and bias resistors not connected, pins 3 and 4 are not actually connected to anything, and this configuration is a "parking" configuration for the jumpers so that they will be readily available should you need to enable the termination and bias resistors in the future.

> ### 6.3 Conformal Coating

> The areas around the crystal oscillator and the battery backup circuit on the CPU card have had the Dow Corning silicone-based 1-2620 conformal coating applied. The conformally coated areas are shown in Figure 22. The conformal coating protects these high-impedance circuits from the effects of moisture and contaiminants over time.

> Figure 22. CPU Card Areas Receiving Conformal Coating

> Any components in the conformally coated area may be replaced using standard soldering procedures for surface-mounted components. A new conformal coating should then be applied to offer continuing protection against the effects of moisture and contaminants.

> NOTE | For more information on conformal coatings, refer to Rabbit Semiconductor Technical Note 303, Conformal Coatings.

> ### 6.4 Use of Rabbit 2000 Parallel Ports

> Figure 23 shows the Rabbit 2000 parallel ports.

> Figure 23. Smart Star CPU Card Rabbit 2000 Systems

> ### 6.5 Exclusion Zone

> It is recommended that you allow for an "exclusion zone" of 3" (80 mm) around the Smart Star in all directions when the Smart Star is incorporated into an assembly that includes other components. This "exclusion zone" that you keep free of other components and boards will allow for sufficient air flow, and will help to minimize any electrical or EMI interference between adjacent boards.

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