Name: Adafruit RS232 Pal - Two Channel UART to RS-232 Level Shifters
Brand: Adafruit
SKU: 5987

Logical pinout · physical placement not verified

VIN
Board logic supply input. Adafruit Learn says to power it with the same voltage as the logic level of the microcontroller.
Type · PowerVoltage · 3.3V or 5V logic supply, matching the microcontroller logic level
GND
Common ground for power and logic.
Type · GroundVoltage · 0V reference
V+
Positive voltage rail output from the RS-232 connection, usable as a reference voltage.
Type · PowerVoltage · RS-232 generated positive rail reference
V-
Negative voltage rail output from the RS-232 connection, usable as a reference voltage.
Type · PowerVoltage · RS-232 generated negative rail reference
LV T1
Low-voltage side channel 1 logic data input from UART.
Type · SignalVoltage · 3.3V or 5V logic
LV R1
Low-voltage side channel 1 logic data output to UART.
Type · SignalVoltage · 3.3V or 5V logic
LV T2
Low-voltage side channel 2 logic data input from UART.
Type · SignalVoltage · 3.3V or 5V logic
LV R2
Low-voltage side channel 2 logic data output to UART.
Type · SignalVoltage · 3.3V or 5V logic
HV T1
High-voltage RS-232 side channel 1 line data output to the remote RS-232 system.
Type · SignalVoltage · RS-232 signalling, Adafruit notes this side can require about ±6V to ±10V
HV R1
High-voltage RS-232 side channel 1 line data input from the remote RS-232 system.
Type · SignalVoltage · RS-232 signalling, Adafruit notes this side can require about ±6V to ±10V
HV T2
High-voltage RS-232 side channel 2 line data output to the remote RS-232 system.
Type · SignalVoltage · RS-232 signalling, Adafruit notes this side can require about ±6V to ±10V
HV R2
High-voltage RS-232 side channel 2 line data input from the remote RS-232 system.
Type · SignalVoltage · RS-232 signalling, Adafruit notes this side can require about ±6V to ±10V

Pin	Type	Function	Voltage
VIN	Power	Board logic supply input. Adafruit Learn says to power it with the same voltage as the logic level of the microcontroller.	3.3V or 5V logic supply, matching the microcontroller logic level
GND	Ground	Common ground for power and logic.	0V reference
V+	Power	Positive voltage rail output from the RS-232 connection, usable as a reference voltage.	RS-232 generated positive rail reference
V-	Power	Negative voltage rail output from the RS-232 connection, usable as a reference voltage.	RS-232 generated negative rail reference
LV T1	Signal	Low-voltage side channel 1 logic data input from UART.	3.3V or 5V logic
LV R1	Signal	Low-voltage side channel 1 logic data output to UART.	3.3V or 5V logic
LV T2	Signal	Low-voltage side channel 2 logic data input from UART.	3.3V or 5V logic
LV R2	Signal	Low-voltage side channel 2 logic data output to UART.	3.3V or 5V logic
HV T1	Signal	High-voltage RS-232 side channel 1 line data output to the remote RS-232 system.	RS-232 signalling, Adafruit notes this side can require about ±6V to ±10V
HV R1	Signal	High-voltage RS-232 side channel 1 line data input from the remote RS-232 system.	RS-232 signalling, Adafruit notes this side can require about ±6V to ±10V
HV T2	Signal	High-voltage RS-232 side channel 2 line data output to the remote RS-232 system.	RS-232 signalling, Adafruit notes this side can require about ±6V to ±10V
HV R2	Signal	High-voltage RS-232 side channel 2 line data input from the remote RS-232 system.	RS-232 signalling, Adafruit notes this side can require about ±6V to ±10V

Logical pinout · physical placement not verified

Pin details

12 connections

VIN
Board logic supply input. Adafruit Learn says to power it with the same voltage as the logic level of the microcontroller.
PowerVoltage · 3.3V or 5V logic supply, matching the microcontroller logic level
GND
Common ground for power and logic.
GroundVoltage · 0V reference
V+
Positive voltage rail output from the RS-232 connection, usable as a reference voltage.
PowerVoltage · RS-232 generated positive rail reference
V-
Negative voltage rail output from the RS-232 connection, usable as a reference voltage.
PowerVoltage · RS-232 generated negative rail reference
LV T1
Low-voltage side channel 1 logic data input from UART.
SignalVoltage · 3.3V or 5V logic
LV R1
Low-voltage side channel 1 logic data output to UART.
SignalVoltage · 3.3V or 5V logic
LV T2
Low-voltage side channel 2 logic data input from UART.
SignalVoltage · 3.3V or 5V logic
LV R2
Low-voltage side channel 2 logic data output to UART.
SignalVoltage · 3.3V or 5V logic
HV T1
High-voltage RS-232 side channel 1 line data output to the remote RS-232 system.
SignalVoltage · RS-232 signalling, Adafruit notes this side can require about ±6V to ±10V
HV R1
High-voltage RS-232 side channel 1 line data input from the remote RS-232 system.
SignalVoltage · RS-232 signalling, Adafruit notes this side can require about ±6V to ±10V
HV T2
High-voltage RS-232 side channel 2 line data output to the remote RS-232 system.
SignalVoltage · RS-232 signalling, Adafruit notes this side can require about ±6V to ±10V
HV R2
High-voltage RS-232 side channel 2 line data input from the remote RS-232 system.
SignalVoltage · RS-232 signalling, Adafruit notes this side can require about ±6V to ±10V

Start wiring

Ethernet · UART · SPI · Shield

Verify supply voltage and logic levels before powering up.

Module pins: VIN, V+, V-, GND, LV T1, LV R1, LV T2, LV R2. Schematik maps them to your board in the app.

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