Automation, Inc.
™
TM_GF-
A
2
1
00_2200_R1A
13
GF-A2100
AND
GF-A2200 A
IRFLOW
M
EASUREMENT
S
TATION
Air Flow Measurement, PID Control and Alarm Solution - Analog Output
GreenTrol Automation, Inc.
•
156 Holly View Lane Loris, SC 29569
•
Toll Free: 877-4GN-TROL (877.446.8765)
•
Internet:
GreenTrol.com
Transmitter Wiring
Transmitter wiring consists of connecting the 24VAC input power, the analog output signal wires and optional alarm out-
put wires at the GF-A2100/GF-A2200. Refer to Figures 9 and 10 for additional detail. Following installation, the airflow
measurement station is ready for operation. Custom setup options (other than the default values) can be entered in the
GF-A2100/GF-A2200 Transmitter Setup procedure detailed later in this document.
Power Transformer Considerations
Select a 24 VAC transformer based on the maximum power requirements of the transmitter (8VA) to ensure that the oper-
ating supply voltage to the transmitter (when powered “ON” with probe connected) is not less than 22.8 VAC or greater
than 26.4 VAC.
Power Connections
1.
Remove the four cover retaining screws at each corner of the transmitter cover in order to gain access to the trans-
mitter Wiring Terminal Block on the main circuit board shown in Figure 9.
2.
Remove cover from the transmitter enclosure. Observe the following precautions when wiring the transmitter:
CAUTION
To prevent damage to the GF-A2100/GF-A2200, deactivate 24 VAC power source until all
connections to the instrument are complete.
The 24 VAC input ground (GND) connection at terminal 6 is shared with the Analog/PID Output
signal grounds at terminal 2. If an isolated output is required, a dedicated isolation transformer
must be provided to power the GF-A2100/GF-A2200.
The GF-A2100/GF-A2200 is a non-isolated device with a half-wave rectifier on the 24VAC power
input terminal at pin 7. Therefore, to prevent equipment damage, multiple devices that are
powered by a common 24VAC transformer output must use common device connections (e.g. pin 6
{ground} to other device ground, and pin 7 {24VAC power} to other device power), or independent
isolation transformers must be provided for each non-isolated device.
The GF-A2100/GF-A2200 24VAC ground and Analog/PID Output signal returns are common.
Therefore it is recommended that the Analog/PID Outputs to the BAS control interface be connected
using two separate twisted shielded pair in order to eliminate potential voltage drop on the common
(from the 24VAC return) that would otherwise cause inaccurate readings.
3.
Connect 24 VAC power to terminal 7, and the 24V ground at terminal 6 of the wiring terminal block as shown in
Figures 9 and 10, observing the previous wiring precautions.
Analog/PID Output Connections
The GF-A2100/GF-A2200 provides two Analog/PID Outputs that can be configured as 0-10VDC, 0-5VDC or 2-10VDC and
are capable of driving loads of up to 20mA (maximum). The 24VAC return ground connection is shared with the
Analog/PID Output signal grounds (GND). If the Analog/PID Outputs must be isolated from the 24VAC return, a dedicat-
ed isolation transformer must be provided to power the GF-A2100/GF-A2200.
4.
Connect OUT1 Analog/PID Output signal wire at terminal 1, and the signal ground at terminal 2 as shown in
Figures 9 and 10 while observing the previous wiring precautions.
5.
Connect OUT2 Analog/PID Output signal wire at terminal 3, and the signal ground at terminal 2 as shown in
Figures 9 and 10 while observing the previous wiring precautions.
Form a “drip loop” with the the sensor probe cable at the transmitter if there is a potential for water runoff or condensation.