CHQ-PCM/DIN(SCI) Plant Control Module - DIN Enclosure with SCICHQ PCM DIN(SCI) Plant Control Module DIN Enclosure with SCI Manufactured by Hochiki, this Hochiki CHQ PCM DIN (SCI) Plant Control Module DIN Enclosure 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