www.advantech.com/products online download features pcld-788 16-ch relay multiplexer board specifcations i/o ? channel closed signal ttl-level pulse ? cold-junction sensor +24.4 mv/ c, 0 v at 0 c output ? contact rating break-before-make with 3 msec. minimum break time ? contact resistance 200 m ? max. ? input channels 16 isolated differential inputs ? programming do bit 0, 1, 2 and 3 for channel selection, do bit 4, 5, 6 and 7 for board selection. onboard dip switches for board-address setting ? max. input voltage 100 v dc or 100 v peak ac ? max. switching current 0.5 a ? max. switching power 10 va ? operating time 1 ms max. ? relay life expectancy 100 million cycles min. at 10 v dc and 1 ma ? release time 1 msec. max. general ? certifcations ce ? connectors controller: 2 x 20-pin box header, second connector in parallel for daisy chaining i/o: screw terminals ? dimensions (l x w) 205 x 114 mm (8" x 4.5") ? mounting 4 x screw holes for fat surface mounting ? power consumption +5 v @ 380 ma max. pcld-788 block diagram ? 16 to 1 channel expansion ? differential and fully isolated multiplexing ? break-before-make relay control ? channel closed signal for precise a/d triggering ? up to 16 pcld-788s can be cascaded for 256 channels ? easy wiring for large channel count confguration ? onboard cold-junction circuitry for thermocouple measurement pin assignments introduction pcld-788 multiplexes 16 channels into a single i/o channel of an a/d converter, voltmeter or ieee-488-based instrument. up to 16 pcld-788s can be cascaded for a total of 256 fully-isolated differential channels. the pcld-788 can be controlled by any pc-labcard? product via a 16-bit 20-pin digital output port, found on cards such as the pcl-711b, pcl-812pg or the pcl-818 series. channel selection (0-15) and board selection (0-15) are done by programming the high-order four bits and low order four bits of a digital output byte from the main i/o card in use. ordering information ? pcld-788 16-ch relay mux board w/ two 20-pin flat cables ? PCL-10120-1 20-pin flat cable, 1 m ? pcl-10120-2 20-pin flat cable, 2 m
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