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BAC-19xxxx FlexStat Installation Guide 

5 926-019-02C

NOTE: 

The 

S (Shield)

 terminal in KMC 

controllers is provided as a connecting 

point for the shield. The terminal 

is not connected to the ground of 

the controller. When connecting to 

controllers from other manufacturers, 

verify the shield connection is not 

connected to the controller’s ground.

EOL On

EOL Off

EOL Off

EOL On

+B

-A

MS/TP

S

ON

OFF

EOL

Illustration 10—MS/TP Connections and EOL (MS/TP Models)

 +B
 –A

Shield Wire 

Connected to 

Ground (on 

One End Only)

Shield Wires 

Connected 

with Wire Nut

Shield Wire 

Not Connected

 +B
 –A

 +B
 –A

OFF

ON

EOL Switches 

Pushed Up 

ON

EOL Switches 

Pushed Up 

EOL Switches 

Pushed Down

2.  Connect the cable shield to a good earth 

ground at 

one end only

.

NOTE: 

Devices on physical ends of MS/TP 

wiring segments must have EOL (End 

Of Line) termination for proper network 

operation. Verify the FlexStat's EOL 

switch is in the proper position.

3.  If a FlexStat is at the physical 

end

 of the MS/

TP network line (only one wire on each –A or 

+B terminal), set both EOL switches to 

On

 on 

the back of the circuit board. If not on the end 

of the line (two wires on each terminal), ensure 

that both switches are Off.

SENSOR AND EQUIPMENT CONNECTIONS

Input Connections

1.  Wire any additional sensors to the 

appropriate 

input terminals

. See the 

BAC-19xxxx FlexStat 

Sequence of Operation and Wiring Guide

(These applications are the selectable pack-

aged programs in the BAC-19xxxx models.)

NOTE: 

Use KMC software to properly 

configure the devices. For 

passive

 

input devices (e.g., switch contacts 

and 10K ohm thermistors), set the 

termination to the 

10K Ohm

 position. 

For 

active

 voltage devices, set it to the 

0 to 12 VDC 

position.

NOTE: 

Unused analog inputs can be 

converted to binary inputs by right-

clicking the input object in KMC 

software and selecting 

Convert to....

NOTE: 

Wire sizes 14–22 AWG can be clamped 

in each terminal. No more than two 16 

AWG wires can be joined at a common 

point.

Output Connections

1.  Wire additional equipment (such as fans, 

dampers, and valves) to the appropriate out-

put terminals. See the 

BAC-19xxxx FlexStat 

Sequence of Operation and Wiring Guide

Connect the device under control between 

the desired output terminal and the related 

SC (Switched Common for relays) or GND 

(Ground for analog outputs) terminal. 

Illustration 11—Switched (Relay) Common and Relay Bank

  

Relay 3

SC (Phase) 1–3

  Relay 2

  Relay 1

One Switched 
Common 
Connection in 
Bank of Three 
Normally 
Open Relays

NOTE: 

For the bank of three relays, there 

is one Switched (relay) Common 

connection (in place of the GND 

terminal used with analog outputs). 

Summary of Contents for BAC-19 FlexStat Series

Page 1: ...g an older FlexStat replace the backplate as well NOTICE OBSERVE PRECAUTIONS FOR HANDLING ELECTROSTATIC SENSITIVE DEVICES KMCConquestTM Automation Hardware QUICK START Complete the following steps to select and install a KMC Conquest BAC 19xxxx FlexStat 1 Select the appropriate model for the intended application and options see the BAC 190000 Series FlexStats Data Sheet at kmccontrols com 2 Mount ...

Page 2: ...outputs e g 12 conductor is recommended Grounds for all the inputs can be combined on one wire MOUNTING A C B Terminal Blocks on Backplate Optional Ethernet Jack on Back of Cover Cover Locking Screw Embossed UP Indicator DIMENSIONS A 3 874 inches 99 4 mm B 5 124 inches 130 1 mm C 1 301 inches 33 0 mm Illustration 1 Dimensions and Mounting Information NOTE For optimum temperature sensor performance...

Page 3: ...and Wiring Guide and the BAC 19xxxx FlexStat Application Guide Illustration 5 BAC 19xx63 Terminals and Connections B A IN7 IN6 GND IN5 IN4 IN3 GND IN2 Common C Phase R Analog 9 GND 7 9 Analog 8 Analog 7 Relay 6 SC 4 6 Relay 5 Relay 4 Relay 3 SC 1 3 Relay 2 Relay 1 Outputs Wiring Cutout in Backplate MS TP Network Optional Inputs 24 VAC Wiring is dependent on application Ethernet Network Connector O...

Page 4: ... TP network see Planning BACnet Networks Application Note AN0404A A Connect the A terminals in parallel with all other A terminals on the network B Connect the B terminals in parallel with all other B terminals on the network C Connect the shields of the cable together at each device using a wire nut or the S terminal in other KMC BACnet controllers CAUTION When reinstalling the cover on the backp...

Page 5: ...PMENT CONNECTIONS Input Connections 1 Wire any additional sensors to the appropriate input terminals See the BAC 19xxxx FlexStat Sequence of Operation and Wiring Guide These applications are the selectable pack aged programs in the BAC 19xxxx models NOTE Use KMC software to properly configure the devices For passive input devices e g switch contacts and 10K ohm thermistors set the termination to t...

Page 6: ...other communication issues in networked MS TP model FlexStats correct phasing on MS TP network and power connections on ALL the networked controllers is critically important NOTE Follow all local regulations and wiring codes 2 Connect a 24 VAC Class 2 transformer or 24 VDC power supply to the power terminals see Illustration 12 A Connect the neutral side of the transform er to the common C termina...

Page 7: ... Cool Auto Off Mode Active Heating Setpoint Units F or C Illustration 13 Screen Menus Access Default NOTE Options in menus are dependent on the FlexStat model and selected application Advanced configuration of a FlexStat can be done through software See the BAC 190000 Series FlexStats Data Sheet for the most relevant KMC Controls tool for additional configuring program ming with Control Basic and ...

Page 8: ...logo is a registered trademark of KMC Controls Inc All rights reserved TEL 574 831 5250 FAX 574 831 5252 EMAIL info kmccontrols com 2022 KMC Controls Inc Specifications and design subject to change without notice 926 019 01C ADDITIONAL RESOURCES The latest support files are always available on the KMC Controls web site www kmccontrols com To see all available files you will need to log in See the ...

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