Appendix A. Specifications

Appendix A provides the specifications for the BL2000 and describes the conformal coating.

A.1 Electrical and Mechanical Specifications

Figure A-1 shows the mechanical dimensions for the BL2000.

Figure A-1. BL2000 Dimensions

NOTE	All measurements are in inches followed by millimeters enclosed in parentheses.

Table A-1 lists the electrical, mechanical, and environmental specifications for the BL2000.

Table A-1. BL2000 Specifications 

Parameter	Specification
Board Size	3.43" × 4.15" × 0.82" (87 mm × 105 mm × 21 mm)
Connectors	one RJ-45 (Ethernet) one 2 × 5, 2 mm pitch (serial programming port) one power jack for AC adpater four 12-terminal screw connectors (18 to 26 AWG wire) for analog and digital I/O, relay
Ethernet Interface	Direct connection to 10Base-T Ethernet networks via RJ-45 connection
Temperature	-40°C to +70°C
Humidity	5% to 95%, noncondensing
External Input Voltage	9 V to 40 V DC or 22 V to 26 V AC
Power Consumption	1.5 W maximum
Onboard Voltage Regulator	Surface-mount switching regulator sources 5 V at up to 1 A
Digital I/O	Up to 28 digital I/O: 11 inputs: hardware-configurable pull-up or pull-down, ± 36 V DC, switching threshold 2.4 V typical up to 7 dual-purpose unbuffered analog inputs that may be software-configured for use as digital inputs, 0 V to 48 V DC, switch threhold may be set in software 10 outputs: sinking or sourcing, +40 V DC, 200 mA maximum per channel
Analog Inputs	Four 12-bit A/D converter inputs, ± 10 V DC, 1 MW input impedance Five 12-bit dual-purposeA/D converter inputs, 0 V to 48 V DC, 12 kW input impedance Two additional 12-bit dual-purpose A/D converter inputs, 0 V to 48 V DC, 12 kW input impedance (BL2010 and BL2030)
Analog Outputs (BL2000 and BL2020)	Two 12-bit D/A converter outputs, 0 V to 4.000 V DC, 1 mA max.
Relay Output	SPDT (N.O., N.C., COM) with snubbers: 1 A @ 30 V DC, 300 mA @ 120 V AC max. contact settling time 4 ms
Microprocessor	Rabbit 2000TM
Clock	22.1 MHz
SRAM	128K, surface mount
Flash EPROM	256K, surface mount
Timers	Five 8-bit timers, one 10-bit timer with two match registers, five timers are cascadable
Serial Ports	4 serial ports: two RS-232 or one RS-232 (with CTS/RTS) one RS-485, onboard network termination and bias resistors one 5 V CMOS-compatible programming port
Serial Rate	Maximum standard asynchronous 230,400 bps
Watchdog/Supervisor	Yes
Time/Date Clock	Yes
Backup Battery	Yes: 3 V lithium coin type, 950 mA·h standard solder-in; optional 3 V, 160 mA·h, for battery using onboard battery holder; external battery connecor

A.2 Conformal Coating

The areas around the crystal oscillator and the battery backup circuit on the BL2000 have had the Dow Corning silicone-based 1-2620 conformal coating applied. The conformally coated areas are shown in Figure A-2. The conformal coating protects these high-impedance circuits from the effects of moisture and contaiminants over time.

Figure A-2. BL2000 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.

A.3 Jumper Configurations

Figure A-3 shows the header locations used to configure the various BL2000 options via jumpers.

Figure A-3. Location of BL2000 Configurable Positions

Table A-2 lists the configuration options.

Table A-2. BL2000 Jumper Configurations

Header	Description	Pins Connected		Factory Default
J9	Pin 12 is Vcc		R160 installed	×
	Pin 12 is GND		R161 installed
JP1	RS-485 Bias and Termination Resistors	1-2 3-4	Bias and termination resistors connected	×
		None	Bias and termination resistors not connected
JP2	Flash Memory Bank Select	1-2	Normal Mode	×
		2-3	Bank Mode
JP3	D/A Converter Power Supply	1-2	+V	×
		2-3	+REF
JP4	Flash Memory Size	1-2	128K/256K	×
		2-3	512K
JP5	SRAM Size	1-2	128K	×
		2-3	512K
JP6	Digital Input Pull-Up/Pull-Down Resistors	1-2	Pulled up	×
		2-3	Pulled down

NOTE	Only header JP1 uses actual jumpers. The other connections are made using 0 W surface-mounted resistors.