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Concept

Concept


Products: RP-C
Functionalities: Hardware
Product version: 2022, 2023, 2024, 7.0, 7.1
9/25/2026

RP-C-16A Screw Terminals

The RP-C-16A model has 16 I/O points and the controller is equipped with 30 fixed screw terminals.

Danger Danger

HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH

Disconnect the power supply and any energized circuits and equipment before wiring.

Failure to follow these instructions will result in death or serious injury.

Recommended screw tightening torque: 0.56 to 0.79 Nm (5 to 7 lbf.in)

 
action_zoom_plus_stroke Screw terminals and other connectors, RP-C-16A (hardware version 10 and later)
Figure: Screw terminals and other connectors, RP-C-16A (hardware version 10 and later)

The 30 screw terminals are used as follows:

  • Three screw terminals for the power input

  • Two screw terminals for the 24 VAC output

  • Six screw terminals for the four solid-state relay (SSR) outputs

  • Four screw terminals for the three relay outputs

  • Three screw terminals for the high power relay output

  • 12 screw terminals for the eight universal inputs/outputs of type Ub

Table: Screw Terminals, RP-C-16A

Terminal number

Designation

Usage

Power input

1

L

Line (L) lead, 230 VAC, 50/60 Hz, 65 VA

2

N

Neutral (N) lead, 230 VAC, 50/60 Hz, 65 VA

3

 
action_zoom_plus_stroke

Protective earth ground

This applies to hardware versiona 10 and later. For more information, see Differences Between RP-C Hardware Versions .

24 VAC output

4

24 VAC Out

24 VAC, 19 VA, isolated output

For more information, see 24 VAC Output on RP-C 230 V Controller Models .

5

24 VAC Out

24 VAC, 19 VA, isolated output

For more information, see 24 VAC Output on RP-C 230 V Controller Models .

Solid-state relay (SSR) outputs

6

DO1

SSR output

7

COM1

Common connection for DO1 and DO2

The COM terminal can be connected to 0 to 24 VAC or -30 VDC to +30 VDC.

8

DO2

SSR output

9

DO3

SSR output

10

COM2

Common connection for DO3 and DO4

The COM terminal can be connected to 0 to 24 VAC or -30 VDC to +30 VDC.

11

DO4

SSR output

Relay outputs

12

COM3

Common connection for DO1, DO2, and DO3

13

DO1

Relay output, type Form A

14

DO2

Relay output, type Form A

15

DO3

Relay output, type Form A

High power relay outputs

16

NC

Normally Closed terminal. High power relay output, type Form C.

17

DO4

Common terminal. High power relay output, type Form C.

18

NO

Normally Open terminal. High power relay output, type Form C.

Universal inputs/outputs

19

Ub1

Universal input/output, type Ub

20

RET

Internally connected to all RET terminals

21

Ub2

Universal input/output, type Ub

22

Ub3

Universal input/output, type Ub

23

RET

Internally connected to all RET terminals

24

Ub4

Universal input/output, type Ub

25

Ub5

Universal input/output, type Ub

26

RET

Internally connected to all RET terminals

27

Ub6

Universal input/output, type Ub

28

Ub7

Universal input/output, type Ub

29

RET

Internally connected to all RET terminals

30

Ub8

Universal input/output, type Ub

  1. The hardware version is shown on the label on the side of the device.

See Also

  • RP-C Controllers
  • RP-C Screw Terminals
  • Wiring
  • 24 VAC Output on RP-C 230 V Controller Models
  • Differences Between RP-C Hardware Versions