X10255

MULTI-MODE MAINS MODULE BURST FIRED OR PHASE ANGLE ZAX27A X10646 INTRODUCTION The ZAX27A provides accurate and precise mains control in both burst fire or phase angle control modes of operation. This printed circuit board firing circuit is capable of driving an external triac or thyristor pair power devices for any load rating. Additional features also include an uncommitted op-amp, which may be used as an error amplifier or comparator for or closed loop (feedback) control, APPLICATIONS Virtually all resistance heaters including ovens, electric furnaces, moulders, dryers, smelters, heating tapes, stress relieving, space heating and heating mantles. This is unsuitable for use on inductive loads. MAIN FEATURES Dual mode control capability. (phase angle OR burst fire) Soft start delay function Output overload & temperature protection Current limit Microprocessor control compatibility 5KV input and supply isolation Suitable for slave firing triacs or SCR pairs INSTALLATION Connections Shown For Manual Control L N 1 0V 5V DC SW1 12 HS FUSE L O A D 5K POT 0V 10K ZAX 27A 10 13 G T2 9 8 T1 MODE SELECTION SW1 (ON) = Phase Angle SW1 (OFF) = Burst Fire WARNING 1. This unit requires fusing. This should be a fast acting semiconductor-type (FF5A) fuse placed in series with the LIVE (240V input) supply lead. 2. All HAZARDOUS LIVE terminals - isolate supply before commencing any installation work. SPECIFICATIONS High voltage side Mains voltage Supply current Max. RMS Load current Load power range Over temp. shut down Over temp. reset Isolation Classification Max. Cable entry Dimensions Overall (Max.) 21mm (H), excluding leads x 33mm (W) x 33mm (D) 230V ac 10% @ 50Hz Low voltage side Supply voltage Supply current Control input range Inhibit high logic Inhibit low logic Supply voltage rejection Temperature coefficient Operating temperature 2 5V 30mA (max.) 0 to 1V or 0 to 5V >4V