Eaton DPCT - Page 29

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Optional add-on boards
DPCT IOM INSTRUCTION OPERATION MANUAL MN124018EN January 2023 www.eaton.com
6. Optional add-on boards
The DPCT controller is available with four (4) additional
option cards: Relay Board, Secondary 4-20mA Device, and
MODBUS. The DPCT will have the capability to have future
option boards installed with the use of a firmware update.
The maximum allowable current through the relays is 8A
250VAC / 30VDC.
When a card is installed, the programming tab for the board
will become visible. Programming values will be retained on
option card.
6.1 Relay output board
It includes four (4) relays with (1) one set of form C contacts
per relay wired to terminal blocks. The relays shall be rated
at 8A, 250VAC and 30VDC. It includes two (2) pull-apart six
(6) pin terminal blocks.
6.1.1 Programming
I. Refer to Appendix J.
6.2 Secondary 4-20 mA device
It includes a two (2) pole 4-20 mA input screw
type, pull-apart terminal block. It also contains four (4) relays
with (1) set of form contacts per relay wired to terminal
blocks. The relays shall be rated at 8A, 250VAC and 30 VDC
and it includes two (2) pull-apart six (60 pin terminal blocks).
6.2.1 Programming:
I. Refer to Appendix K.
6.3 Modbus board
It includes an eight (8) pole dip switch bank designed
to switch between RS422 and RS485 with or without
terminating resistors. Includes one (1) pull‐apart six (6) pin
terminal block for TXD0, TXD1, RXD0, RXD1, Common, and
a blank terminal. Includes two (2) surface mount LED’s, one
(1) for transmitting and one (1) for receiving.
6.3.1 Programming:
I. Refer to Appendix L.
6.3.2 Modbus dip switch settings
 SW1 SW2 SW3 SW4 SW5 SW6 SW7 SW8
RS422 Unterminated OFF OFF OFF OFF OFF OFF OFF OFF
RS422 Terminated RX OFF OFF OFF OFF ON ON OFF OFF
RS422 Terminated TX ON OFF ON OFF OFF OFF OFF OFF
RS422 Terminated RX/TX ON OFF ON OFF ON ON OFF OFF
RS485 Unterminated OFF ON OFF ON OFF OFF OFF OFF
RS485 Terminated ON ON ON ON OFF OFF OFF OFF