Pinout and dimensions - GMP252

Vaisala CARBOCAP GMP252 CO2 Probe Quick Guide

Product status
Document code
M211893EN-B
ft:locale
en-US
Product
GMP252
Document type
User guide
Pin # Function Note Wire colors 1
1 Power in

Digital output: 12–30 V DC

Voltage output: 12–30 V DC

Current output: 20–30 V DC

Average consumption < 0.4 W, maximum 0.5 W

  Brown
2

RS-485- or voltage output

Voltage output: 0–5 V DC or 0–10 V DC 2

  White
3 GND   Blue
4

RS-485+ or current output

Current output: 0–20 mA or 4–20 mA 2

  Black
5 Output control

Connecting pin #5 to GND (pin #3) forces the probe to analog output mode. If an analog output configuration has not been selected, default 0–10 V DC and 4–20 mA scalings are used. If pin #5 is not connected, the analog or digital output selected when ordering or set later through configuration is used.

  Gray

Replacing the filter

To open the filter, turn the filter counter-clockwise.Reinstall the filter to finger tightness.

Caution: Do not open the probe body. Be careful not to touch any parts under the filter.

1 Cable with open wires.
2 Default analog output scaling.