Hochiki CHQ-PCM(SCI) Plant Control Module with SCIHochiki CHQ PCM(SCI) Plant Control Module with SCI Manufactured by Hochiki, this Hochiki CHQ PCM (SCI) Plant Control Module With SCI is a loop powered input output module with four independent change over relay outputs and four monitored inputs. The outputs feature N O and N C volt free contacts and can be driven separately under the control of the fire alarm panel, to be used for the control of devices such as dampers or for plant and equipment