The Models EN-EIC-325 and EN-EIC-325-PCI Four Axis Encoder Interface Cards accommodate most of the popular optical encoders available. The board supports either square-wave or sinusoidal output encoders, both linear and rotary types. It can be directly connected to up to four encoders and will also provide necessary excitation to the encoders. The card is equipped with four differential inputs for limit or home switches/marker/encoder index and 10(PCI)/11(ISA) single-ended inputs for general use. Also, there are four opto-isolated outputs that may be used for set-points, carry/overflow or index/marker and three opto-isolated outputs for general use. The card has four 24-bit up/down latch counters. Each counter can be programmed for a preset value. There is an internal status register for rapid storing and clearing of signals.
Specifications EN-EIC-325 and EN-EIC-325-PCI Cards Number of Encoders: 4 per board Multiple Encoder Pulses: 1, 2 or 4 (software selectable) Encoder Outputs:sinusoidal or square-wave types Counter Size: 24-bit up/down with latched buffer Method of Communication with PC Bus: I/O port addressing, 16 jumper selectable address ranges (ISA), automatic selection (PCI) Encoder Inputs: 4 Wave Signal Inputs (one per channel) • Single ended or differential for square wave • Differential for sinusoidal wave 4 Wave Index (Marker) Inputs (one per channel) • Single ended or differential 11 General purpose inputs (ISA)/ 10 General purpose inputs (PCI), TTL/CMOS compatible Schmidt trigger single-ended
Encoder Outputs: 4 Event signal outputs • Can be set to respond to following events - setpoint, overflow and index/marker • 1 Opto-isolated output per channel 3 General purpose opto-isolated outputs
Power (all supplied from ISA or PCI bus): +5 V, 200 mA max; +12 V, 100 mA max; -12 V, 50 mA max Encoder Connectors: mini D-Sub 44 pin (mating connector supplied) Output Connectors: D-Sub 9 pin Operating Ambient: 0 to 50°C (32 to 122°F), up to 80% RH non-condensing Dimensions: EN-EIC-325; 153 L x 107 mm W (6.0 x 4.2") EN-EIC-325-PCI; 129 L x 107 mm W (5.1 x 4.2") Weight:150 g (5.3 oz)
ENCODER SIGNALS SQUARE-WAVE SIGNAL Signals: square wave A phase and B phase shifted by 90°, single-ended or differential Compatibility: HTL 0.5-5V or TTL compatible Rate: 500 Kpps max
SINUSOIDAL SIGNALS Signals: two incremental sinusoidal signals (phase A and B shifted by 90°) differential Signal Range (Encoder Output): Impedance:<1 K: current output encoders, >± 100 µA; voltage output encoders, >± 100 mV for phases A, B and for the reference marker/index pulse Encoder Excitation: 5 Vdc Light Source Current: 900 mA total max, protected by a polyswitch resettable fuse Rate: 500 Kpps max:
ENCODER COUNTER Counter: 24-bit up/down counter +24bit latched buffer per counter Setpoint: independently programmable setpoint for each counter Buffers: user may freeze the buffers without stopping the counters from counting Operation: independent operation mode for each axis Encoder Pulses: single/multiple encoder pulses (1, 2 or 4 - software selectable) Counter Reset: counter may be reset when index is reached (software selectable) Output (EN-EIC-325, EN-EIC-325- PCI)/Interrupt (EN-EIC-325 only) Options for each Encoder (independently selectable): set-point reached, counter carry flag, index/marker