DC2259A Analog Devices

DEMO MANUAL DC2259A LTC6811-1 Daisy Chain isoSPI Battery-Stack Monitor DESCRIPTION Demonstration circuit 2259A is a Daisy Chain isoSPI Alternatively, for a simple demo, connect twelve 100 Battery-Stack Monitor featuring the LTC6811-1. Multiple resistors between each contact from position 4to position boards can be linked through a 2-wire isolated serial in- 16 as shown in Figure 1. Then, provide a stack-equivalent terface to monitor any number of cells on a stack. power supply connection to position 16 (positive) and position 4 (return). The supply may be adjusted to provide Communication to a PC uses a DC2026 Linduino One the desired nominal cell voltage (e.g., 43.2V will be 3.6V/ as a USB interface. The DC2026 comes preloaded with cell). Note that cell discharge cannot be demonstrated a legacy DC590 emulator function (an actual DC590 can properly with a resistor string stimulus. 1 still be used ). A control program for up to ten stacked boards has a Graphical User Interface (GUI) to implement Photo 1 shows the following connections for two boards the device command set. on a stack interfaced to a PC: To control more than one DC2259A, RJ45 (Ethernet) patch 1. Connect a USB cable from the PC USB port to DC2026. cables are also required. 2. Connect a 14-pin ribbon from DC2026 to the SPI BOT- TOM connector (J2) on the bottom DC2259A board. HARDWARE SETUP 3. Connect an RJ45 cable from the bottom DC2259A isoSPI When connected to a battery stack, power for the DC2259A B RJ45 connector (J4) to the next (or top) DC2259A is provided by the cell group being monitored. Separate isoSPI A RJ45 connector (J3). the screw-terminal section from J1 and wire cell voltage 4. Set the jumpers on each DC2259A as indicated in connections or resistors into the clamping contacts to Photo2. provide the power and input stimulus for the ADC. 5. Mate the J1 cell-voltage connectors. Cell voltages are wired from position 4 (most negative potential of the group) with increasing potentials up to position 16 (most positive potential). Design files for this circuit board are available at DEMO MANUAL DC2259A DESCRIPTION Photo 2. Connections and Jumpers dc2259af 2