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Programmable Logic Controller Trainer (SIEMENS)   PLC-2240   Downloadable Data Sheet         (I) PLC CPU Unit   - I/O Capacity : 24 points         - Timers & Counters : 256 timers / counters  - Data Memory : Read / Write : 2560 words ; Read-only : 512 words  - Interrupt Processing : External interrupt = 4        - Interval Timer Interrupts : 1  - Memory Protection : HR and Read / Write DM area contents; and Counter values maintained during power interruptions.  - Self-Diagnostic Functions : CPU unit failure (watchdog timer), I/O bus error, and memory failure.  - Program Checks : No END instructions, programming error (continuously checked during operation).  - High-Speed Counter : One high-speed counter : 6 x 30Khz single-phase & 4 x 30Khz two-phase  - Pulse Output : Two points at 20Khz pulse rate  - Input Time Constants : Can be set to 1 ms, 2ms, 4ms, 8ms, 16ms, 32ms, 64ms or 128ms.  - Analog Controls : 2 controls.  - Build-In RS 232 adapter on PPI cable  - PPI cable with RS232 / RS485 converter  - PLC Training Manual    - Ladder Programming Software (Windows) c/w Manual  - Programming Console  Since lot of limitation with console, it is advisable to use PC  - Accessories : Power Cord, Cable, Manual    (II) Trainer Base Consist Of :  - Indicator Lamps for all outputs (10 points)  - standard 4mm electrical sockets Terminal For Input and Output -         Switches for all inputs (14 nos)    Technical Specification   Physical Size   Dimensions (WxHxD) 330mmx113mmx330mm Weight Approx. 3 kg Power Loss (dissipation) Approx. 16.5W at full load (i.e. with additional loads connected. CPU Features   On-board digital inputs 14 inputs. (Additional connectors to external switches are provided. Built-in switches are toggle type.)   On-board digital outputs 10 outputs. (Indicator lamps) High speed counters (32-bit value)     Total 6 High-speed counters   Single Phase Counters 6, each at 30kHz max. clock rate   Two Phase Counters 4, each at 30kHz max. clock rate Pulse outputs 2 at 20 kHz pulse rate Analog adjustments 2 with 8-bit resolution Timed interrupts 2 with 1 ms resolution Edge interrupts 4 edge up and/or 4 edge down Selectable input filter times 7 ranges from 0.2 ms to 12.8 ms Pulse Catch 14 pulse catch inputs Time of Day Clock (clock accuracy) 2 minutes per month at 25°C 7 minutes per month at 0°C to 55°C Program size (stored permanently) 4096 words Data block size (stored permanently) : 2560 words   Stored permanently   2560 words   Backed by super capacitor or battery   2560 words Number of Expansion I/O modules 7 modules Maximum digital I/O 256 points Maximum analog I/O 32 inputs and 32 outputs Internal memory bits 256 bits   Stored permanently on power down   112 bits   Backed by super capacitor or battery   256 timers Timers total 256 bits   Backed by super capacitor or battery   64 timers   1 ms   4 timers   10 ms   16 timers   100 ms   236 timers Counters total 256 counters   Backed by super capacitor or battery   256 counters Boolean execution speed 0.37 µs per instruction Move Word execution speed 34 µs per instruction Timer/Counter execution speed 50 µs to 64 ps per instruction Single precision math execution speed 46 µs per instruction Real math execution speed 100 µs to 400 µs per instruction Super capacitor data retention time 190 hours, typical, 120 hours minimum at 40°C