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M211920EN-C

Quick Guide

GMP251 and GMP252

Relay Box for GMP250 Carbon Dioxide Probes

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Содержание GMP251

Страница 1: ...M211920EN C Quick Guide GMP251 and GMP252 Relay Box for GMP250 Carbon Dioxide Probes ...

Страница 2: ... change without prior notice Local rules and regulations may vary and they shall take precedence over the information contained in this manual Vaisala makes no representations on this manual s compliance with the local rules and regulations applicable at any given time and hereby disclaims any and all responsibilities related thereto This manual does not create any legally binding obligations for ...

Страница 3: ... control ppm CO2 Voltage output through the relay box ppm CO2 or CO2 Probe power supply requirements 20 30 VDC supplied through the relay box Relay configuration interface Serial line Vaisala Industrial Protocol Using GMP251 252 for relay control requires using the Vaisala Industrial Protocol serial line interface to configure the probe to use relays and wiring the probe to send output and receive...

Страница 4: ...m software The default serial interface settings are shown in the following table Table 2 Default Serial Interface Settings Property Description Value Bit rate 19200 Parity None Data bits 8 Stop bit 1 Flow control None For more detailed instructions on connecting to GMP251 GMP252 with a computer and using the serial line interface see the User Guides of the probes 1 3 Configuring Relays with Seria...

Страница 5: ... current mA 1 Connect GMP251 GMP252 to a computer with USB service cable 242659 and open a terminal connection for example PuTTy 2 Enable advanced configuration commands with the pass 1300 command 3 Set the serial mode of the analog current output channel 2 to relay control with the following command smode relay2 Chapter 1 Relay Box Quick Guide 5 ...

Страница 6: ... probe is in error state The relay mode of GMP251 and GMP252 probes has been designed to use 12 mA as the relay control current Use only 12 mA for the set_value configuration when using the relay box with GMP251 and GMP252 Example Set the analog output channel 2 current to control relay operation with the following settings The relay is activated when the measurement is over 10100 ppm CO2 and rele...

Страница 7: ...eleased set_ppm CO2 ppm level at which the relay is activated set_value the current output mA when the relay is activated set to 12 error_value the current output when the probe is in error state The relay mode of GMP251 and GMP252 probes has been designed to use 12 mA as the relay control current Use only 12 mA for the set_value configuration when using the relay box with GMP251 and GMP252 Exampl...

Страница 8: ...is reset or powered up Note only use the RELAY2 option Available modes RELAY1 Voltage output channel do not use for relay control with the GMP250 relay box RELAY2 Set analog output channel 2 current to relay control use only this option with the relay box Example set serial mode to RELAY2 channel 2 current output smode RELAY2 Serial mode RELAY2 1 3 4 Relay Configuration Commands Table 4 Rsel Comma...

Страница 9: ...ue shows the state of the relay mA the relay is either activated released or in error state error_value The current mA that is output when the probe is in an error state Table 5 Rsel Command for GMP250 Software Version 1 2 9 Syntax Description rsel channel cr Show current relay settings channel Analog output channel rsel channel parameter release_ppm set_ppm set_value error_value cr Configure rela...

Страница 10: ...C for current output Voltage output from GMP25x is internally connected to Vout Figure 1 Probe and Relay Box Wiring 1 Open the relay box screws and remove the cover 2 Lead the GMP251 252 probe connection cable with open wires 223263SP 244669SP 216546SP through the left cable gland and connect the open wires to the screw terminals as shown in Figure 1 page 10 3 Lead the relay box input output cable...

Страница 11: ...1 5 Relay Box Dimensions The relay box dimensions are given in millimeters mm 72 Ø4 8 105 26 40 6 Figure 2 GMP250 Relay Box Dimensions Chapter 1 Relay Box Quick Guide 11 ...

Страница 12: ...Relay Box for GMP250 Carbon Dioxide Probes Quick Guide M211920EN C 12 ...

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Страница 14: ...www vaisala com ...

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