Entry type: Product note Entry ID: 4328236, Entry date: 02/04/1997
S7-300, New High-Speed I/O Modules with Diagnostics
Concerns products with the Catalog Nos.: 6ES7 321-7BH00-0AB0 SM 321, 16x24 V DC, with interrupt 6ES7 322-8BF00-0AB0 SM 322, 8x24 V DC/0.5 A, isolated _SM 321-7BH digital input module_ The SM 321-7BH is a high-speed interrupt module with 16 DI/24 V DC. The input delay can be parameterized to 0.1ms; 0.5ms; 3ms; 10ms. The minimum response time that can be achieved with the S7-300 is thus approx. 1ms. The new module permits detection of high-speed events as well as diagnos- tics of the inputs and of the module itself. The following can be monitored: - Rising edge of an input signal (generates process interrupt in OB 40). - Falling edge of an input signal (generates process interrupt in OB 40). - Transducer supply missing (generates diagnostic interrupt in OB 82). - Internal diagnostics of the module (generates diagnostic interrupt in OB 82). _SM 322-8BF digital output module_ The SM 322-8BF is a digital output module with 8 DO, 24 V DC/ 0.5A and diagnostics. The outputs are suitable for a redundant configuration, i.e. there are 2 connections per channel. One channel is wired conventionally and the other one has a series diode for redundant operation. The output current cannot be increased by connecting the outputs in parallel. This module now permits diagnostics of 24 V DC circuits with S7-300/ET 200M. The module has extensive diagnostics features, as well as substitute value switching in the case of a fault. There is a group signal with LED display as well as a channel signal with evaluation possibility. The following events can be diagnosed: - Short circuit to M. - Short circuit to P. - Wire breakage. - Load voltage missing. - Module diagnostics: No aux. voltage, watchdog, EPROM/RAM fault. Technical data: Outputs: 8 DO Voltage: 24 V DC Current: 0.5 A Diagnostics: Short circuit, wire breakage, load voltage, module. Substitute value switching option. Your SIMATIC contact at your local Siemens office will answer any further questions you may have. ---------------------------------
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