KMC Controls FlexStat Application Guide

FlexStat (General) 6 Application Guide, Rev L
IN4
IN3
GND
IN2
NOTE: Custom programming is required
Inputs
250 ohms
4–20
mA DC
(–)
(+)
4–20 mA Current Input
To use a 4–20 mA current input:
1. Connect an external 250 ohm resistor from input to ground. (Do not
install the resistor inside the FlexStat’s case since the heat generated
by the resistor may skew the temperature readings.) The resistor
converts the 4–20 mA current input to a 1–5 VDC voltage that can be
read by the thermostat’s analog-to-digital converter.
2. Set the corresponding pull-up switches to the 0–12 VDC position.
3. Using BACstage or TotalControl, congure the input device type for a
4–20 mA source.
1
2
3
4
5
6
3
4
3
4
IN4 =
5
6
10K
Ω
0-12 V
5
6
IN3 =
7
8
7
8
IN2 =
7
8
EOL =
Pushed Left Pushed Right
1
2
ONOFF
1
2
10K Ω
0-12 V
10K
Ω
0-12 V
Analog Input Configuration (in BACstage)
External 250 Ohm Resistor for 4–20 mA Current Inputs
Input Pull-Up Switches Set to 0–12 VDC

KMC Controls FlexStat Specifications

General

Brand	KMC Controls
Model	FlexStat
Category	Thermostat
Language	English