Macurco GD-6, Руководство по эксплуатации

Страница: 14 / 160

Macurco GD Operation Manual
REV – 1.0.0 [34-2900-0027-6 ] 13 | P a g e
4. The dry contact, SPDT fan relay has three terminals. The common (COM.), normally open (N.O.) and the
normally closed (N.C.) contact. The fan relay can switch up to 5.0 A up to 240 VAC. See OPERATION section
of these User Instructions for details on relay settings.
5. The Fan Relay can be configured for latching or non-latching (default) when activated (when the gas
concentration exceeds fan relay set point). Once latched in, power will need to be interrupted or the “TEST”
button pressed to un-latch the relay condition.
6. The Fan Relay will engage if the fan setting Combustible Gas concentration is exceeded for longer than the
Fan Relay Delay time. Unless it is configured for latching, the fan relay will disengage once both of these
conditions have been met:
•
Combustible Gas concentration has dropped below fan setting
• Fan Relay Run time has been exceeded
Note that the “disable” fan setting will cause the fan relay to not engage. The fan relay will engage in trouble
fault condition (if the Trouble Fan Setting Option is set to “ON”) and will disengage once trouble fault
condition is cleared.
7. The Current Loop is 4 mA in clean air and 4-20 mA for 0-50% LEL
Figure 3-9 – 12-Series 4-20 mA Output