The Keithley 7056 is a 10-channel scanner card with electrical connection made through a quick disconnect screw terminal card (Model 7055). It is a cost-effective and versatile solution to relay switching applications. Each channel of the card has two Form A (SPNO) contacts. The switch can be wired for either 2-pole or 1-pole switching through the selection of the appropriate output. In 1-pole operation, channels HI and LO operate as independent, isolated inputs, thereby effectively doubling the number of input channels. In 20 channel mode, use as a one of 20 channel selector switch.
CHANNELS PER CARD:
10 in 2-pole mode, 20 in 1-pole mode.
2-pole Form A; includes quick disconnect card. HI or LO switched to a separate output for 1- pole mode. Common guard connection.
Screw terminal, #18AWG maximum wire size. Terminals mounted on quick disconnect portion of 7056.
RELAY DRIVE CURRENT:
24mA per relay typical.
MAXIMUM SIGNAL LEVEL:
150V, 250mA, 10VA (resistive load only).
>108 closures cold switching; >107 closures at maximum signal levels.
<2O to rated life.
<100µV per contact pair input to output with copper leads (<50µV typical).
<2ms, exclusive of mainframe.
INPUT ISOLATION, DIFFERENTIAL:
INPUT ISOLATION, COMMON MODE:
COMMON MODE VOLTAGE:
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