EC1
Encoder; SSI, Incremental, A-Quad-B and/or General Purpose Counter
The EC1 Encoder Module is designed to deliver precise feedback for a variety of control systems, supporting multiple encoder types. It provides four channels, each independently programmable for SSI, Incremental, Quadrature (A-QUAD-B), or general-purpose signal transition counting. Incremental and Quadrature encoder inputs are typically used to measure relative position, speed, and direction, while SSI (Synchronous Serial Interface) support enables accurate acquisition of absolute position data. The module also includes a general-purpose input signal transition counting feature. The EC1 offers four isolated channels, which are essential for maintaining signal integrity and preventing cross-talk in electrically noisy and rugged environments. This isolation is crucial for protecting sensitive components from voltage spikes and interference, thereby enhancing reliability and accuracy. To ensure reliable operation in challenging environments, the EC1 incorporates input filtering for noise immunity, making it ideal for electrically noisy settings, such as those encountered in aircraft and industrial machinery.
- Number of Channels: 4 channels; individually isolated. Independently programmable for selected operation mode
- SSI Mode: See Below
- I/O Voltage Range: RS-422 (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 µs to 32 µs (1 µs resolution programmable); SSI clock transition: Rising / Falling edge; SSI clock watchdog: Preload
- Incremental Quad. (A-QUAD-B) Encoder/Counter Mode: See Below
- I/O Voltage Range: TTL or RS-422/485
- Programming Type: Quadrature (Differential; A, B, INDEX), UP, DOWN, PRE-LOAD, MODULUS-N
- Data Pre-Load / Compare Registers: Two 32-bit registers (Coarse counter & fine counter); Same register for zero bit and parity bit; data register is full 32-bit
- Resolution: Programmable 1x, 2x or 4x resolution multiplier (for quadrature mode)
- De-Bounce (Filter): Programmable per bit from 0 to 1.311 ms (16-bit resolution). LSB= 40 ns.
- Timer: Programmable internal interval timer with 16-bit pre-scaler
- Counter Rate: 10 MHz (typ) / 62.5 MHz (max)
- General: See Below
- Maximum Signal Voltage: ±15 VDC
- Isolation: 250 V min. (between channels and each channel to system GND)
- Power: 5 VDC @ 330mA (est. typ)
- Weight: 1.5 oz. (42 g)
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1/20/2026 8:16:45 AM
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