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Concept

Concept


Products: RP-C
Functionalities: Hardware
Product version: 2023, 2024, 7.0
3/30/2023

RJ45 Pinout for the RS-485 Port(s) of the RP-C Controllers

This section provides the RJ45 pinout for the RP-C controllers' RS-485 port(s).

The number of RS-485 ports with RJ45 interface and the RJ45 pinout differ between the different controller models.

Regarding the differences in the set of RS-485 ports and RJ45 pinout, the RP-C models can be divided into the following three categories:

  • Models with “-F” in the product name:

    RP-C-12A-F-24V, RP-C-12B-F-24V, RP-C-12C-F-24V, RP-C-16A-F-230V, RP-C-16B-F-24V, and RP-C-16B-F-230V

  • Models with “-M” in the product name:

    RP-C-12A-M-24V, RP-C-12B-M-24V, and RP-C-16A-M-24V

  • RP-C-16C-F-230V model

For more information, see RP-C Models .

The RP-C models with “-F” in the product name have two RS-485 ports with RJ45 interface, which are labeled RS-485 Com A and RS-485 Com B. The RJ45 pinout differs only with regards to pin 2 between the two RS-485 ports.

Note:

For the RP-C-12A-F-24V, RP-C-12B-F-24V, RP-C-12C-F-24V, and RP-C-16A-F-230V controller models, the rating for the RS-485 Com A port, the RJ45 pinout for the RS-485 Com B port, and the labeling of the two RS-485 ports differ between different hardware versions of the controllers. For more information, see Differences Between RP-C Hardware Versions .

The RP-C models with “-M” in the product name have one RS-485 port with RJ45 interface, which is labeled RS-485 Com A. The RJ45 pinout for this RS-485 port is the same as for the RS-485 Com A port on the other RP-C models.

The RP-C-16C-F-230V model has three RS-485 ports with RJ45 interface, which are labeled RS-485 Com A, RS-485 Com B, and RS-485 Com C. The RJ45 pinout for these three RS-485 ports is the same as for the RS-485 Com A port on the the other RP-C models. For more information, see RJ45 Pinout for the RS-485 Ports of RP-C-16C-F-230V .

The wiring recommendations for the RS-485 ports depend on the type of network the ports are used for. For more information, see Communication Port Wiring .

 
action_zoom_plus_stroke RJ45 pinout for the RS-485 port(s) of the RP-C controllers
Figure: RJ45 pinout for the RS-485 port(s) of the RP-C controllers

Table: RJ45 Pinout for the RS-485 Com A Port

RJ45 Pin

Description

1

Not connected

2

Not connected

3

RS485+ (A)

4

+24 VDC

5

Ground

6

RS485– (B)

7

+24 VDC

8

Ground

Table: RJ45 Pinout for the RS-485 Com B Port

RJ45 Pin

Description

1

Not connected

2

TXEN

3

RS485+ (A)

4

+24 VDC

5

Ground

6

RS485– (B)

7

+24 VDC

8

Ground

See Also

  • Wiring
  • Communication Port Wiring
  • RP-C Communication Ports
  • Communication Ports on RP-C Models with “-F” in the Product Name
  • Communication Ports on RP-C Models with “-M” in the Product Name
  • Communication Ports on RP-C-16C-F-230V
  • RP-C Sensor Bus
  • RP-C Room Bus
  • RP-C Modbus
  • Differences Between RP-C Hardware Versions
  • RP-C Models
  • RJ45 Pinout for the RS-485 Ports of RP-C-16C-F-230V