Isolated Synchronous-Serial-Interface Card for Encoders with SSI-Interface
SSI 1276
Highlights
- 4 isolated synchronous serial interfaces
- 6 isolated digital output channels
Technical Data
General
The card SSI 1276 is an interface card for PCs and compatibles. It serves for the measured value acquisition of up to 4 absolute encoders with synchronous serial interface with separation from periphery and system side. Additionally the card has 6 digital outputs and 4 zero inputs. The value "0" can be assigned by these zero inputs to each connected encoder in any position. All inputs and outputs are galvanically isolated from the system side by optocouplers.
Programming
The control of the data transmission of the SSI interfaces takes place via the timer/counter chip 82C54. This component has three counters. The following parameters of the data transmission can be programmed via these counters.
| Used interfaces | programmable parameters |
|---|---|
| – one interface | clock frequency, number of bits, measuring rate |
| – 2 to 4 interfaces | clock frequency, number of bits |
Technical Specifications
| Synchronous serial interface | 4x SSI interface, optoisolated |
|---|---|
| – Interrupt | IRQ10, 11, 12 or 15 |
| – Data inputs | EIA RS422, optoisolated |
| – Received bits | max. 25 bit |
| – Clock output | EIA RS422, optoisolated |
| – Clock frequency | max. 1 MHz |
| Outputs | 6 digital outputs, optoisolated |
| – Switchable output current | max. 30 V / 25 mA |
| – External power supply | max. 30 V |
| Supply voltage | +5 V, max. 0.5 A |
| Connector | DB37 male |
| CE | EMC 2014/30/EU RoHS 2011/65/EU + 2015/863 LVD 2014/35/EU |
| Operating temperature | 0 - 50 °C |
| Storage temperature | -25 to +85 °C |
| Dimensions | 162 x 112 mm |
