The DRS 11/SN-MSP01-KC 4x128MB=512MB Digital input/output devices provide UNIBUS computers with efficient monitoring and control functions useful for a variety of indus- trial and scientific applications. Specific uses include monitoring operator pan- els, controlling relays and indicator lights, scanning limit switches and unlock- ing doors. The input module (SN-MSP01-KC 4x128MB=512MB) provides 48 optically isolated inputs with one interrupt input. The output module (DRS11) provides 48 buffered out- puts with one interrupt. Any mixture of DRS11 and/or DSS11 modules may be mounted in a UNIBUS system provided that the total does not exceed 16 and subject to the normal constraints of mounting space, bus loads, and 5-volt power. SN-MSP01-KC 4x128MB=512MB 11 -A Digital output device (TTL). Includes one RC filtered interrupt input, two 3-m (19.6-ft) flat ribbon cables (50 conductors) ter- minated into 50 pin BERG connectors for connection to field output signals. SN-MSP01-KC 4x128MB=512MB-B Digital output device with open collector drives. Includes one SN-MSP01-KC 4x128MB=512MB filtered interrupt input, two 3-m (19.6-ft) flat ribbon cables (50 conductors) terminated into 50 pin BERG connectors for connection to field output signals. SN-MSP01-KC 4x128MB=512MB 11 -MP Optically isolated DC output drivers with open collectors; pre- requisite is DRS11 B. - SN-MSP01-KC 4x128MB=512MB-A Digital input device (TTL). Includes two 3-m (19.6-ft) ribbon cables (50 conductors) terminated into 50 pin BERG connec- tors for connection to field input signals. SN-MSP01-KC 4x128MB=512MB-B Digital input device. Includes two 3-m (19.6-ft) ribbon cables (50 conductors) terminated into 50 pin BERG connectors for - connection to field input signals. SN-MSP01-KC 4x128MB=512MB -MP Contact sense input, prerequisite is DSS11 A. -