Emerson 210-2000 Benutzerhandbuch

 

 

 

Product Information Sheet

210-2000

 

The mounting plate has two sets of three-terminal 
connectors. The connector on the left side of the 

mounting plate is where sensor power and the signal-

to-I/O-board connection is made. The connector on 

the right side is where connection to the on-board 

relay is made. 
 

The CO

2

 sensor requires 24VAC power from a non-

center-tapped transformer. The sensor draws a 

maximum of 3VA power. CPC recommends P/N 640-
0039, 10VA, 110VAC non-center-tapped Class 2 

transformer. 

 

Wire the transformer secondary to the connector on 

the left side of the mounting plate, as shown in Figure 
2. 

 

The middle terminal of the connector on the left side 

of the mounting plate is the analog output that 

communicates the current CO

2

 concentration level to 

the site controller. This connector is typically 

connected to a point on an I/O board, such as a 16AI, 

16AIe, or 8DO. Wire the middle (SIGNAL) terminal on 

the CO

2

 sensor to the even numbered terminal of the 

I/O board point. Wire the COMMON terminal on the 
CO

2

 sensor to the odd numbered terminal of the I/O 

board point. See Figure 2. 

 

The CO

2

 sensor has an on-board relay that changes 

state to indicate a CO

2

 level higher that a 

programmed set point. This relay can be used as a 

digital input on an input board point, or it can be used 

to directly activate or deactivate an alarm 

annunciator or a device that controls ventilation. 
 

The connector on the right side of the mounting plate 

is a Form C connector for the CO

2

 sensor relay. 

Connect the input board point or device to the 

middle  (COMMON)  terminal  of  this  connector,  and 

either the N.C. or N.O. terminal, depending on 

whether you want the relay to be OPEN or CLOSED 
when the CO

2

 concentration is below the set point. 

See Figure 2. 

 

 

 
 

 

 

 

 
 

 

 

 
 

  

 

When you are finished wiring power and I/O to the 

connectors on the mounting plate, reconnect the 
circuit board to the mounting plate. Push the top end 

of the circuit board into the mounting plate so the 

two hooked tabs on the circuit board are underneath 

the tabs on the mounting plate. Then, gently press 

down on the bottom part of the circuit board until it 
snaps into place. See Figure 3. 

If you have trouble pushing the circuit board in, check 

to see if the pins on the back of the circuit board are 

properly aligned with the power and relay connectors 

on the mounting plate. Also verify that there are no 
loose wires getting in the way.