TOWER SYSTEM
7
Jumper
Option
Setting
Description
J16
UART3 Isolation/Access Jumpers
1-2
Connects UART3_TX to T1IN on RS-232
transceiver associated with J17
3-4
Connects UART3_RX to R1OUT on RS-232
transceiver associated with J17
5-6
Connects UART3_RTS to T2IN on RS-232
transceiver associated with J17
7-8
Connects UART3_CTS to R2OUT on RS-232
transceiver associated with J17
J18
UART3 RTS/DCD Loopback
1-2
Provides a loopback of RTS to DCD on UART3
2-3
Provides a pulldown on UART3 DCD
J19
UART2 RTS/DCD Loopback
1-2
Provides a loopback of RTS to DCD on UART3
2-3
Provides a pulldown on UART3 DCD
J20
UART2 Isolation/Access Jumpers
1-2
Connects UART2_RX to R on RS-485
transceiver associated with J22/J23
3-4
Connects UART2_TX to D on RS-485
transceiver associated with J22/J23
5-6
Connects UART2_RTS to DE on RS-485
transceiver associated with J22/J23
7-8
Connects UART2_CTS to a pull-down resistor
J21
RS-485 Termination Enable
1-2
Enables 121 Ohm termination between RS-485
A and B
TWR-IND-IO Header Descriptions
The following is a list of all available headers and their descriptions
Header
Description
Pin Details
J2 (J24,
J25)
Analog Screw Terminal
1-VDDA, 2-VSSA, 3-DAC0,
4-VSSA, 5-AN1, 6-AN2
7-AN3, 8-VSSA, 9-VDDA
J7
USB2SER RTS/CTS
1-CTS, 2-RTS
J8
UART1
1-TXD1, 2-RXD1, 3-RTS1,
4-CTS1
J11
CAN1 Header
1-CANH, 2-GND, 3-CANL
J12
CAN2 Header
1-CANH, 2-GND, 3-CANL
J17
RS-232 Header
3-TXD, 4-CTS, 5-RXD, 6-RTS,
9-GND
(others signals are NC)
J22
RS-485 Screw Terminal (Power)
1-Isolated GND, 2-Isolated
VCC, 3-Isolated GND
J23
RS-485 Screw Terminal (Signal)
1-Isolated DE, 2-RS-485 B,
3-RS-485 A
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