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NP-546A-X1 Installation Sheet TCON289–12/00
Connecting Contact, Thermistor, or Voltage (0–5 V) Sensors
Warni ng! Ensure that no power is connected to the NP-546A-X1
during electrical installation. Failure to disconnect
power from all interconnected equipment when
performing electrical installation may result in damage
to the components and/or electrical shock or burns.
1. Connect the external input devices (contact, thermistor, or
voltage) leads to an input terminal, TB5-1 through TB5-4 (Input 1
to Input 4, see Figure 4).
2. Connect the other input device lead (common return lead) to the
signal ground terminal, TB5-6 (Ground).
3. Voltage input devices derive power either from an off-board supply
or at the +24VDC terminal, TB5-5.
Connecting the Air Velocity Sensor
Perform the following steps to connect the airflow detection probe or
pickup ring to the controller:
Note: When performing these steps, use a maximum length of
4' (1.4 m) of 0.170" (4.3 mm) I.D. FRPE polyethylene
tubing or 0.25" (6.34 mm) O.D./0.125" (3.175 mm)
I.D. Tygon tubing.
1. Connect the low pressure side of the velocity sensor to the barbed
fitting labeled Low on the NP-546A-X1.
2. Connect the high pressure side of the velocity sensor to the barbed
fitting labeled High on the NP-546A-X1.
Caution! Do not make connections to the pressure sensor or
transmitter with excessive force. Applying
excessive force on either fitting could cause
permanent damage to the sensor or transmitter.
Note: Do not expose the on-board velocity transmitter to
moisture during installation or operation. If moisture is
a potential problem, orient the tubing and controller so
that the barbed fittings are situated at an elevation
higher than the lowest part of the tubing to create a trap
for any moisture accumulation.
I/STAT, W/STAT, and S/STAT Connections
1. Connect the I/STAT, W/STAT, or S/STAT white, red, and black
conductors to TB4-1 through TB4-3 (Signal, Power, and Ground)
as shown in Figure 6.
2. The blue lead delivers the signal (voltage) from the slide
potentiometer on the S/STAT and the yellow lead delivers the
contact closure from the push-button switch. The use of these
signals, and the choice of input terminals is dependent upon
whether a customized application program has been placed in the
controller.
Figure 4. Input Device Connections
TB5
+24VDC
GROUND
INPUT 4
INPUT 3
INPUT 2
INPUT 1
INPUT PORT
GROUND
INPUTS
TB5
+244321 GND
10K ohm Thermistor
0–5V
Analog Sensor
Figure 5. Velocity Sensor Connections
High Low
Airflow
4'
Tubing (Max.)
Air Flow Sensor
Low
High
Low
High
Figure 6. I/STAT, W/STAT, and S/STAT Connections
White
Red
Black
I/STAT, S/STAT and W/STAT
TB5
TB4
GROUND
INPUT 4
INPUT 3
INPUT 2
I/STAT
PORT
POWER
SIGNAL
INPUT 1
INPUT PORT
GROUND
NOT USED
INPUTS
STAT
TB4 TB5
GND
54321
GND
12V
SIG
Blue
Yellow
S/STAT Only
