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Concept

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Products: MP-C
Functionalities: Hardware
Product version: 2023, 2024
6/20/2023

MP-C-24A-M Screw Terminals

The MP-C-24A-M model has 24 I/O points and the controller is equipped with 41 fixed screw terminals and a 3-position removable screw terminal block.

Danger Danger

HAZARD OF ELECTRIC SHOCK, EXPLOSION, OR ARC FLASH

Disconnect the power supply and other high voltage equipment before wiring.

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

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

 
action_zoom_plus_stroke Screw terminals and other connectors, MP-C-24A-M

Screw terminals and other connectors, MP-C-24A-M

The 41 fixed screw terminals are used as follows:

  • Three screw terminals for the power input

  • Eight screw terminals for the four relay outputs

  • 30 screw terminals for the 20 universal inputs/outputs of type Ub

The 3-position removable screw terminal block is used for connection to the BACnet MS/TP (RS-485) network.

Table: Screw Terminals, MP-C-24A-M

Terminal number

Designation

Usage

Power input

1

24 VAC/DC

24 VAC, 50/60 Hz, 10 VA

Positive lead (+) when operating the device from 24-30 VDC, 5 W

2

 
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/ –

Earth ground lead of 24 VAC transformer connects to terminals 2 or 3.

Terminals 2 and 3 are internally connected.

Negative (–) lead when operating the device from 24-30 VDC, 5 W

3

 
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Terminal 3 is provided for convenience to connect to protective earth ground (optional).

Terminals 2 and 3 are internally connected.

RS-485 terminals

4

RS-485+

Connection to TX/RX+ (RS-485+) signal in the BACnet MS/TP (RS-485) network.

5

RS-485–

Connection to TX/RX– (RS-485–) signal in the BACnet MS/TP (RS-485) network.

6

SHIELD

Convenience terminal to interconnect two shield drain wires (incoming and outgoing). There is no electrical connection in the device. The shield should be connected to ground at only one location and that is recommended to be at the automation server. The shield should not be connected directly to the RET terminal on the automation server. The transient energy on the drain wire should be conducted to ground and not through the automation server.

Universal inputs/outputs

7

Ub17

Universal input/output, type Ub

8

RET

Internally connected to all earth ground and RET terminals

9

Ub18

Universal input/output, type Ub

10

Ub19

Universal input/output, type Ub

11

RET

Internally connected to all earth ground and RET terminals

12

Ub20

Universal input/output, type Ub

Relay outputs

19

DO1

Relay output, type Form A

20

DO1

Relay output, type Form A

21

DO2

Relay output, type Form A

22

DO2

Relay output, type Form A

23

DO3

Relay output, type Form A

24

DO3

Relay output, type Form A

25

DO4

Relay output, type Form A

26

DO4

Relay output, type Form A

Universal inputs/outputs

35

Ub1

Universal input/output, type Ub

36

RET

Internally connected to all earth ground and RET terminals

37

Ub2

Universal input/output, type Ub

38

Ub3

Universal input/output, type Ub

39

RET

Internally connected to all earth ground and RET terminals

40

Ub4

Universal input/output, type Ub

41

Ub5

Universal input/output, type Ub

42

RET

Internally connected to all earth ground and RET terminals

43

Ub6

Universal input/output, type Ub

44

Ub7

Universal input/output, type Ub

45

RET

Internally connected to all earth ground and RET terminals

46

Ub8

Universal input/output, type Ub

47

Ub9

Universal input/output, type Ub

48

RET

Internally connected to all earth ground and RET terminals

49

Ub10

Universal input/output, type Ub

50

Ub11

Universal input/output, type Ub

51

RET

Internally connected to all earth ground and RET terminals

52

Ub12

Universal input/output, type Ub

53

Ub13

Universal input/output, type Ub

54

RET

Internally connected to all earth ground and RET terminals

55

Ub14

Universal input/output, type Ub

56

Ub15

Universal input/output, type Ub

57

RET

Internally connected to all earth ground and RET terminals

58

Ub16

Universal input/output, type Ub

  • MP-C Controllers
  • MP-C Screw Terminals
  • Wiring