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Power exhaust j11-3 c tan gra pec ctb thermostat – Carrier 50HCQA User Manual

Page 31

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Input 8 or 9 is recommended for easy of installation. Refer

to Fig. 47 and Fig. 49 for wire terminations at J5.

Remote Occupancy: The remote occupancy accessory is

a field--installed accessory. This accessory overrides the

unoccupied mode and puts the unit in occupied mode.

When installing this accessory, the unit must be

configured

for

remote

occupancy

by

setting

MENU

Config

Inputs

input 3, 5, 8, or 9 to Remote

Occupancy and normally open (N/O) or normally closed

(N/C).
Also set MENU

Schedules

occupancy source to DI

on/off. Input 8 or 9 is recommended for easy of

installation. Refer to Fig. 47 and Table 8 for wire

terminations at J5.
Power Exhaust (output): Connect the accessory Power

Exhaust contactor coil(s) per Fig. 55.

Power Exhaust

J11-3

C

TAN

GRA

PEC

CTB

THERMOSTAT

C08464

Fig. 55 -- RTU--MP Power Exhaust Connections

Space Relative Humidity Sensor: The RH sensor is not

used with 50HCQ models at this time.

Communication Wiring -- Protocols

General —
Protocols are the communication languages spoken by

control devices. The main purpose of a protocol is to

communicate information in the most efficient method

possible. Different protocols exist to provide different

kinds of information for different applications. In the BAS

application, many different protocols are used, depending

on manufacturer. Protocols do not change the function of

a controller; just make the front end user different.
The RTU--MP can be set to communicate on four different

protocols: BACnet, Modbus, N2, and LonWorks. Switch 3

(SW3) on the board is used to set protocol and baud rate.

Switches 1 and 2 (SW1 and SW2) are used to set the

board’s network address. See Fig. 56 for the switch setting

per protocol. The 3rd party connection to the RTU--MP is

through plug J19.
NOTE: Power must be cycled after changing the SW1--3
switch settings.
Refer to the RTU--MP 3rd Party Integration Guide for

more detailed information on protocols, 3rd party wiring,

and networking.

SW3 Protocol Selection

PROTOCOL

DS8

DS7

DS6

DS5

DS4

DS3

DS2

DS1

BACnet MS/TP

(Master)

Unused

OFF

OFF

OFF

ON

OFF

Select Baud Select Baud

Modbus

(Slave)

Unused

OFF

OFF

ON

ON

OFF

Select Baud Select Baud

N2

(Slave)

Unused

OFF

OFF

OFF

ON

ON

OFF

OFF

LonWorks

Unused

ON

ON

OFF

ON

OFF

OFF

OFF

NOTE:

DS = Dip Switch
BACnet MS/TP SW3 example shown

Baud Rate Selections

BAUD RATE

DS2

DS1

9600

OFF

OFF

19,200

ON

OFF

38,400

OFF

ON

76,800

ON

ON

C07166

Fig. 56 -- RTU--MP SW3 Dip Switch Settings

50H

C

Q

A