48TC

Alarm state is reset when the smoke detector alarm condition is cleared and reset at the smoke detector in the unit.

Connecting Discrete Inputs

Filter Status

The filter status accessory is a field-installed accessory. This accessory detects plugged filters. When installing this accessory, the unit must be configured for filter status by setting MENUConfigInputsinput 3, 5, 8, or 9 to Filter Status and normally open (N/O) or normally closed (N/C). Input 8 or 9 is recommended for easy of installation. Refer to Fig. 59 and Fig. 60 for wire terminations at J5.

Fan Status

The fan status accessory is a field-installed accessory. This accessory detects when the indoor fan is blowing air. When installing this accessory, the unit must be

configured for fan status by setting MENUConfigInputsinput 3, 5, 8, or 9 to Fan Status and normally open (N/O) or normally closed (N/C). Input 8 or 9 is recommended for easy of installation. Refer to Fig. 59 and Fig. 60 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 MENUConfigInputsinput 3, 5, 8, or 9 to Remote Occupancy and normally open (N/O) or normally closed (N/C).

Also set MENUSchedulesoccupancy source to DI on/off. Input 8 or 9 is recommended for easy of installation. Refer to Fig. 59 and Table 21 for wire terminations at J5.

Power Exhaust (output)

Connect the accessory Power Exhaust contactor coil(s) per Fig. 66.

Power Exhaust

PEC

TAN

J11-3

LCTB

THERMOSTAT

GRA C

C08464

Fig. 66 - RTU-MP Power Exhaust Connections

Space Relative Humidity Sensor - The RH sensor is not used with 48TC 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 67 for the switch setting per protocol. The 3rd party connection to the RTU-MP is through plug J19. Refer to the RTU-MP 3rd Party Integration Guide for more detailed information on protocols, 3rd party wiring, and networking.

NOTE: Power must be cycled after changing the SW1-3 switch settings.

SW3 Protocol Selection

PROTOCOL

DS8

DS7

DS6

DS5

DS4

DS3

DS2

DS1

BACnet MS/TP

Unused

OFF

OFF

OFF

ON

OFF

Select Baud

Select Baud

(Master)

 

 

 

 

 

 

 

 

Modbus

Unused

OFF

OFF

ON

ON

OFF

Select Baud

Select Baud

(Slave)

 

 

 

 

 

 

 

 

N2

Unused

OFF

OFF

OFF

ON

ON

OFF

OFF

(Slave)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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. 67 - RTU-MP SW3 Dip Switch Settings

48

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Carrier 48TCA04---A12 appendix Connecting Discrete Inputs, Power Exhaust output, Communication Wiring Protocols

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