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BAC-7302 RTU Controller

Revision E

Installing the controller

Connecting to a NetSensor

11

Output 3  

Typically programmed with a PID loop object to control two-stage 

cooling. Triac 3A turns on when the programmed output is above 40% and off below 
30%. Triac 3B turns on when the programmed output is above 80% and turns off 
below 70%.

Output 4  

This output is a universal output that can be programmed as either an 

analog or digital object.

Connecting to a 
NetSensor

The Network RJ–12 connector provides a connection port to a NetSensor model 
KMD–1161 or KMD–1181. Link the controller to a NetSensor with a KMC Controls 
approved cable up to 75 feet long. See the installation guide supplied with the 
NetSensor for complete NetSensor installation instructions.

Connecting to an 
MS/TP network

Connections and wiring

Use the following principles when connecting a controller to an MS/TP network:

Connect no more than 128 addressable BACnet devices to one MS/TP network. 
The devices can be any mix of controllers or routers.

To prevent network traffic bottlenecks, limit the MS/TP network size to 60 
controllers.

Use 18 gauge, twisted pair, shielded cable with capacitance of no more than 
50 picofarads per foot for all network wiring. Belden cable model #82760 meets 
the cable requirements.

Connect the -

A

 terminal in parallel with all other - terminals.

Connect the +

B

 terminal in parallel with all other + terminals.

Connect the shields of the cable together at each controller. For KMC BACnet 
controllers use the 

S

 terminal.

Connect the shield to an earth ground at one end only.

Use a KMD–5575 repeater between every 32 MS/TP devices or if the cable 
length will exceed 4000 feet (1220 meters). Use no more than seven repeaters 
per MS/TP network.

Place a KMD–5567 surge surpressor in the cable where it exits a building.

Illustration 2-3 Connection to a NetSensor

OUT4

GND

T3B

RTN3

T3A

T2B

RTN2

T2A

RT

N1

T1

75 feet Max.

Содержание BAC-7302

Страница 1: ...nputs 9 Connecting outputs 10 Connecting to a NetSensor 11 Connecting to an MS TP network 11 Connecting power 13 Programming 14 Section 3 Operating the controller Operation 15 Controls and Indicators 15 Restoring factory settings 18 Installation and Operation Guide BAC 7302 and BAC 7302C Advanced Applications Controller 905 019 53E Revision E ...

Страница 2: ... translated into any language in any form by any means without the written permission of KMC Controls Inc Printed in U S A Disclaimer The material in this manual is for information purposes only The contents and the product it describes are subject to change without notice KMC Controls Inc makes no representations or warranties with respect to this manual In no event shall KMC Controls Inc be liab...

Страница 3: ...oof top units Easy to install simple to configure and intuitive to program Controls room temperature humidity fans monitors refrigeration lighting and other building automation functions Specifications Inputs Universal inputs 4 Key features Software selectable as analog binary or accumulator objects Accumulators limited to three in one controller Standard units of measure NetSensor compatible Over...

Страница 4: ...tion Automatically assigns MAC addresses and device instance numbers Removable screw terminal block Wire size 14 22 AWG NetSensor Compatible with models KMD 1161 and KMD 1181 Connects through RJ 12 connector Programmable features Control Basic 10 program areas PID loop objects 4 loop objects Value objects 40 analog and 40 binary Time keeping Real time clock with power backup for 72 hours BAC 7302 ...

Страница 5: ... 15 Subpart B BACnet Testing Laboratory listed CE compliant SASO PCP Registration KSA R 103263 Environmental limits Operating 32 to 120 F 0 to 49 C Shipping 40 to 140 F 40 to 60 C Humidity 0 95 relative humidity non condensing Installation Supply voltage 24 volts AC 15 20 50 60 Hz 25 VA Class 2 only non supervised all circuits including supply voltage are power limited circuits Weight 8 2 ounces 1...

Страница 6: ...ories Power transformer XEE 6111 40 Single hub 120 volt transformer XEE 6112 40 Dual hub 120 volt transformer Table 1 1 BAC 7302 Dimensions A B C D E 4 36 in 6 79 in 1 42 in 4 00 in 6 00 in 111 mm 172 mm 36 mm 102 mm 152 mm OUT4 GND T3B RTN3 T3A T2B RTN2 T2A RTN1 T1 A E B C D ...

Страница 7: ...omote safety we use hazard alert labeling in this manual Follow the associated guidelines to avoid hazards Danger Danger represents the most severe hazard alert Bodily harm or death will occur if danger guidelines are not followed Warning Warning represents hazards that could result in severe injury or death Caution Caution indicates potential personal injury or equipment or property damage if ins...

Страница 8: ...KMC Controls Revision E About the BAC 7302 Safety considerations 8 ...

Страница 9: ... or enclose all cables in conduit Connecting inputs The BAC 7302 controller has four universal inputs Each input can be configured to receive either analog or digital signals By using the optional pull up resistors either passive or active devices may be connected to the inputs Note KMC supplied Control Basic programs assign input 1 I1 to the space temperature sensor input If the KMC programs are ...

Страница 10: ...e voltage up to a maximum of 5 volts DC then place the input pull up jumper in the Off position Connecting outputs The BAC 7302 includes one single stage triac two three stage triacs and one universal output All triacs are rated for 24 volt 1 ampere loads switch on zero crossing and are optically isolated Caution When connecting loads to triacs use only the terminal marked RTN associated with each...

Страница 11: ...ecting a controller to an MS TP network Connect no more than 128 addressable BACnet devices to one MS TP network The devices can be any mix of controllers or routers To prevent network traffic bottlenecks limit the MS TP network size to 60 controllers Use 18 gauge twisted pair shielded cable with capacitance of no more than 50 picofarads per foot for all network wiring Belden cable model 82760 mee...

Страница 12: ...ed to the ground of the controller When connecting to controllers from other manufacturers verify the shield connection is not connected to ground End of line termination switches The controllers on the physical ends of the EIA 485 wiring segment must have end of line termination installed for proper network operation Set the end of line termination to On using the EOL switches Illustration 2 4 MS...

Страница 13: ...not exceed its rating and phasing is correct If several controllers are mounted in the same cabinet you can share a transformer between them provided the transformer does not exceed 100 VA or other regulatory requirements Do not run 24 volt AC power from within an enclosure to external controllers Connect the 24 volt AC power supply to the power terminal block on the lower right side of the contro...

Страница 14: ...n the KMC Controls web site BACstage User s Guide to Installation and Getting Started 902 019 62 BAC 5000 Reference Guide 902019 63 TotalControl Reference Guide Application Note AN0404A Planning BACnet Networks MS TP Automatic MAC Addressing Installation Instructions Supplied applications programming Refer to the KMC Digital Applications Manual for information on using the applications programs in...

Страница 15: ...ibed in the guide MS TP Automatic MAC Addressing Installation Instructions that is available from the KMC Controls web site Network disconnect switch The network disconnect switch is located on the left side of the controller Use this switch to enable or disable the MS TP network connection When the switch is ON the controller can communicate on the network when it is OFF the controller is isolate...

Страница 16: ...estart operation is complete Restart button operations are listed in the following table Communications Com LED The yellow Communications LED indicates how the controller is communicating with other controllers on the network Sole master Repeating pattern of a long flash and a short pause that repeats once a second It indicates that the controller has either generated the token or is a sole MS TP ...

Страница 17: ...voltage or current on the network exceeds safe levels the bulbs operate as fuses and may protect the controller from damage Isolation bulbs The two network isolation bulbs KMC P N HPO 0054 located next to the network switch serve three functions Removing the bulbs opens the EIA 485 circuit and isolates the controller from the network If one or both bulbs are lit it indicates the network is imprope...

Страница 18: ...red will have no effect on the controller Performing a warm start A warm start changes the controller as follows Restarts the controller s Control Basic programs Leaves object values configuration and programming intact Caution In the unlikely event that the checksum test in RAM fails during the warm start the controller will automatically perform a cold start During a cold start controller output...

Страница 19: ...old start with BACstage or from TotalControl Design Studio Restoring to factory settings Restoring a controller to factory settings changes the controller as follows Removes all programming Removes all configuration settings Restores the controller to factory default settings Caution Resetting the controller erases all configuration and programming After resetting to factory settings you must conf...

Страница 20: ...KMC Controls Revision E Operating the controller Restoring factory settings 20 ...

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