MLV/Condenser Board — One auxiliary board is op- tionally installed in each unit. See Fig. 11. The auxiliary board contains an analog output for head pressure control and dis- crete outputs for minimum load control. The auxiliary board responds to commands from the MBB and sends the MBB the results of the channels it monitors via the Local Equipment

Network (LEN). See below for auxiliary board A, B and C DIP switch addresses. See Table 8 for inputs and outputs.

AUX BOARD

1

2

3

4

5

6

7

8

DIP SWITCH

 

 

 

 

 

 

 

 

Address:

OFF

ON

OFF

OFF

ON

OFF

ON

OFF

LOCATION OF

DIP SWITCH

a30-4046

SERIAL NUMBER

STATUS SIO (LEN)

 

 

 

 

ON

 

 

 

 

 

 

 

D8

D7

Q5

 

D5

 

24VAC

J1

Q1

U1

D3

 

 

 

 

 

 

 

S1

 

Y1

 

L2

J9

 

 

 

 

1

2

3

4

5

6

7

8

 

 

 

 

D6

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

L5

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

100K

 

100K

 

 

 

U2

 

 

 

 

 

 

Q12

 

 

Q60

 

 

L3

100K

 

U5

U6

U7

U8

U9

Q10

Q11

U10

U21

U4

JP2

J4

C61

CH13

JP1

 

D12

TR1

TR2 TR3 TR4

TR5

TR6

TR7 TR8

J2

J3

 

 

 

– G + – G + CH13 CH14 3 2 1 3 2 1

CH1

CH2 CH3

CH4

CH5

CH6

CH7 CH8

CH9

CH10

CH11

CH12

Fig. 11 — Auxiliary Board with Optional Minimum Load Control or Head Pressure Control

Table 8 — Auxiliary Board Outputs

DESCRIPTION

INPUT/OUTPUT

I/O TYPE

DISPLAY MODULE POINT NAME

CONNECTION POINT

Pin

Notation

 

 

 

 

 

 

 

 

 

AUX-J1

Power (24 vac supply)

11

24 vac

 

 

 

 

12

Ground

 

 

 

 

 

AUX-J9

 

 

 

 

+

RS485 Port (D+)

 

 

 

 

G

RS485 Port (Gnd)

Local Equipment Network

-

RS485 Port (D-)

 

 

 

 

+

RS485 Port (D+)

 

 

 

 

G

RS485 Port (Gnd)

 

 

 

 

-

RS485 Port (D-)

Condenser Head Pressure Control

 

 

 

 

AUX-CH9

HD_A

0-10 VDC

Head Press Actuator Pos, SPD.A

+

Signal

Speed Signal

 

 

 

-

Ground

 

 

 

 

Minimum Load Valve A

MLV-A

Solenoid

Minimum Load Valve Circuit A, MLV.A

 

AUX-J2-CH3

Minimum Load Valve B

MLV-B

Solenoid

Minimum Load Valve Circuit B, MLV.B

 

AUX-J2-CH4

15

Page 15
Image 15
Carrier 30XW150-400 AUX Board DIP Switch, Local Equipment Network, Head Press Actuator Pos, SPD.A, Location DIP Switch

30XW150-400 specifications

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