Additional Features: Multifunction Module 16 bits of digital input and output 100 kHz totalizer input Two ±12V analog outputs The Agilent 34907A allows great flexibility for a variety of sense and control applications. The Agilent 34907A combines two 8-bit ports of digital input and output, a 100 kHz gated totalizer, and two ±12V analog outputs - all on a single earth-referenced module. The digital inputs and totalizer input may be included in a scan. Alarm limits for the digital and event counter inputs are evaluated continuously, capturing and logging alarm conditions even between scans. Digital Input/Ouput Use-the digital inputs to sense limit switch and digital bus status. There are no complex handshake modes; reads and writes are initiated either from the front panel or the bus. Digital Input/Output Port 1, 2: 8 bit, input or output, nonisolated Vin(L): < 0.8V (TTL) Vin(H): > 2.0V (TTL) Vout(L): < 0.8V @ Iout = -400 mA Vout(H): > 2.4V @ Iout = 1 mA Vin(H) max: < 42V with external open drain pull-up Alarming: Maskable pattern match or state change Speed: 4 ms (max) alarm sampling Latency: 5 ms (typical) to 34970A alarm output Read/Write: Speed 95/s Totalize Input Totalize Input Max Count: 226 - 1 Totalize Input: 100 kHz (max) Rising or falling edge, programmable Signal level: 1 Vp-p (min) 42 Vpk (max) Threshold: 0V or TTL, jumper selectable Gate Input: TTL-Hi, TTL-Lo, or none Count Reset: Manual or Read + Reset Read Speed: 85/s Analog Output Analog Output DAC 1, 2: ± 12V, nonisolated Resolution: 1 mV IOUT: 10 mA max Settling time: 1 ms to 0.01% of output Accuracy: ±(% of output + mV) 1 year ±5°C: 0.25% + 20 mV Temp. Coefficient: ± ( 0.015% + 1 mV)/°C