Specifications68C3 Operations Manual North Atlantic Industries, Inc. 12/19/2014Rev: 2014-12-19-0947 www.naii.com Page 44 of 330Encoder (Module E7) – Four (4) Isolated SSI, A-Quad-B Encoder / General CounterChannels/Module: 4 channels; individually isolated;Independently programmable for selected operation modeSSI ModeI/O Voltage Range: TTL/RS422/485 (single-ended or differential)Operational Modes: Each channel, programmable for either “Standard Controller” or “Listen Only”SSI “Listen / Standard” Mode: SSI Data Word Length (up to 32 bit programmable)Data Word Encoding: Binary or Gray Code (programmable)Parity: Odd, Even, None with “0-bit” (programmable)Interrupt Generation: Programmable event(s)SSI “Standard” Mode: SSI clock rate: 1 s to 32 s (1 s resolution programmable)SSI clock transition: Rising / Falling edge (programmable)SSI clock watchdog: Preload (up to 32-bit programmable)Incremental Quadrature (A-QUAD-B) Encoder / Counter ModeProgrammable Type: Quadrature (Differential; A, B, INDEX), UP, DOWN, PRE-LOAD, MODULUS-NPre-Load / Compare Registers: 32 bitResolution: Programmable 1x, 2x or 4x resolution multiplierDe-Bounce (Filter): Programmable per bit from 0 to 3.2768 ms (16-bit resolution). LSB= 50 nsTimer: Programmable internal interval timer with 32-bit pre-scalerCount Rate: 25 MHz (max)GeneralMaximum Signal Voltage: 24 VDCIsolation: 500 V (between channels and each channel to system GND)Power (Per 4 Channel Module): +5 VDC @ 1 A (max)Weight: 1 oz. (28g)
