PP Systems EGM-5 User Manual

EGM-5 Operation Manual V. 1.04 22 support@ppsystems.com
Terminal Block
An external 10 pin terminal block is available for CO
2
analog output, analog input (for additional sensor),
+5V OUT and alarms.
CO2 Analog Output
GND
Ground connection for CO
2
analog output
CO2
Analog output for CO
2
(0-2.5V). 0 corresponds to 0 CO
2
and 2.5V
corresponds to full scale (defined by user).
Analog Input
GND
Ground connection for analog input
ANALOG IN
Analog input for external sensor (0-1V). The input voltage is displayed and
saved in the data output as a voltage signal. The user can then convert the
voltage signal into the appropriate value depending on the sensor used.
+5V OUT
Additional 5V power supply for external sensors if required. It is
recommended that no more than 400mA of current be used.
Alarms
ALARM 2A
Associated with Low Alarm. The relays are rated for 30 VDC 1A or 125 VAC
0.3 A.
ALARM 2B
Associated with Low Alarm. The relays are rated for 30 VDC 1A or 125 VAC
0.3 A.
ALARM 1A
Associated with High Alarm. The relays are rated for 30 VDC 1A or 125 VAC
0.3 A.
ALARM 1B
Associated with High Alarm. The relays are rated for 30 VDC 1A or 125 VAC
0.3 A.
Analog Voltage Output
One analog voltage output is available for the current CO
2
reading. The full scale output is 2.5V. The CO
2
concentration corresponding to full scale can be set by the user in the Main > Settings 2 > Analog Output
screen. 0 Volts always corresponds to 0 ppm CO
2
. The analog voltage output is located on the terminal
block at the pins labeled CO2 (positive) and GND (negative).
Analog Voltage Input
One analog voltage input is available for general purpose use. The maximum input voltage is 1.0V. The
input voltage is displayed and saved in the data measurements.
Alarm Relay Outputs
There are two normally open relay contacts that are activated (closed) when the Low CO
2
Alarm (Alarm
1) or High CO
2
Alarm (Alarm 2) condition occurs. The Alarm limits are set in Main > Settings 1 > Alarms.
The relays are rated for 30 VDC at 1A or 125 VAC at 0.3 A. The 5V output could be connected to one
side of these relays to create a digital output signal. Relays can also be used to trigger an external device
such as a computer or warning light.

PP Systems EGM-5 Specifications

General

Brand	PP Systems
Model	EGM-5
Category	Measuring Instruments
Language	English