ENMET MX-42A User Manual

Page 21

MX42A C

ONTROL

ENMET Corporation

7.6 Control functions

Accessible after removal of front panel

For each channel:

A set of 10 microswitches

Microswitch no. 8: on/off

Microswitch no. 7: maintenance/normal

Microswitch no. 6: “adjustment/calibration”

displays

alarm settings / loop signal

Microswitch no. 5: normal/parking garage (alarm 1 and 2) used for European regulations

Microswitch no. 4: increase/decrease (alarm 1)

Microswitch no. 3: “manual/auto” (alarm 1 and 2)

latching / non-latching

Microswitch no. 2: time delay/average (alarm 3)

Microswitch no. 1: increase/decrease (alarm 2 and 3)

Microswitch no. 9: time delay coding (alarm 3)

Microswitch no. 10:time delay coding (alarm 3)

Potentiometers for the adjustment of zero and sensitivity of detector

Programming by pushbutton switches of alarms thresholds, averaging time (alarm 2)

7.7 Relays

Relay contacts

2 relays per channel for alarm 1 and alarm 2 (positive safety)

1 common relay for alarm 3 (or on option for remote transmission of alarm) (positive safety)

1 common relay for fault (negative safety)

for each relay, choice of common closed contact or common open contact (by positioning jumpers S3 to S12)

characteristics of contact: 2A-250 V

or 30 V

7.8 Output

4-20 mA current outputs per channel (common ground)

Load resistance (loop): maximum 600 ohms

In case of fault: output < 1 mA

In maintenance position: output = 2 mA