Input Connections; Output Connections - KMC Controls FlexStat BAC-1xx63 Series Installation Manual

Input Connections

Passive input devices require pull-up resistors in
the circuit. For passive input devices (e.g., switch
contacts and Type III 10K ohm thermistors) on IN2
through IN4, set the pull-up switches on the back
of the circuit board to the 10K position. For active
voltage devices, set the switches to the 0–12 VDC
position. (See Illustrations 3 and 4.)
NOTE: Unlike the EOL switch pairs (1-2), the
INPUT switch pairs (3-4, 5-6, and 7-8)
must NOT have both switches set to the
left or both set to the right—if switch 3 is
set to the left, for example, switch 4 must
be set to the right (or vice versa). ALL the
input pull-up resistor switch pairs must
be fully latched in either 10K Ohm or
0–12 VDC positions even if a switch pair
has no input connected! A single incorrect
switch position may cause errors in mul-
tiple inputs.
NOTE: For more information on wiring specific
applications (AHU, FCU, HPU, RTU), see
the Applications section starting on page
4. (These applications are the packaged
programs selectable from the Advanced >
Application menu in the BAC-1xx63C mod-
els.) See also the FlexStat Application Guide
on www.kmccontrols.com.
NOTE: FlexStat inputs do not support 1K ohm
RTDs. To use a 4–20 current loop input or
map analog inputs as binary values, see the
FlexStat Application Guide.
BAC-1xx63 Series (6 Relays, 3 Analog Outputs)

Output Connections

Connect the device under control between the desired
output terminal and the related SC (Switched Com-
mon for relays) or GND (Ground for analog outputs)
terminal. (See Illustration 4). For the bank of three
relays, there is one Switched (relay) Common connec-
tion (in place of the GND terminal used with analog
outputs). (See Illustration 5).
One Switched
Common
Connection
Per Bank of
Three
Normally
Open Relays
Illustration 5—Switched (Relay) Common and Relays
Do not attach a device that draws current exceeding
the FlexStat's output capacity:
• Maximum output current for individual ANA-
LOG outputs (7–9) is 20 mA @ 12 VDC (each).
• Max. output current is 1 A for individual
RELAYS @ 24 VAC/VDC or a total of 1.5 A per
bank of 3 relays (relays 1–3 and 4–6).
For example, KMC REE-3111/3112 relays could
be connected to the analog outputs, but REE-
3211/3221/3213 relays would exceed the FlexStat's
analog output capacity (although the REE-3211 can
be used with the FlexStat's internal relays 1–6 as
shown in the following applications pages).
FlexStat relays 1–6 are NO, SPST (Form "A"). (To
emulate binary outputs with the analog outputs, set
the output voltage to be either 0 or 12 VDC
Basic.)
CAUTION
Relays are for Class-2 voltages (24 VAC) only. Do not
connect line voltage to the relays!
CAUTION
Do not mistakenly connect 24 VAC to an analog
output ground. This is not the same as a relay's
switched common. See the backplate's terminal
label for the correct terminal.
3
Relay 3 (or 6)
SC 1–3 (or 4–6)
Relay 2 (or 5)
Relay 1 (or 4)
in Control
Installation Guide