| User Memory |
4 MB (standard), 2 MB (safety) |
| I/O Memory |
0.98 MB |
| Optional Nonvolatile Memory |
1784-SD1 (1 GB) or 1784-SD2 (2 GB) Secure Digital card |
| Backplane Current Load |
800 mA @ 5.1 V DC, 5 mA @ 1.2 V DC |
| Power Dissipation |
2.5 W maximum |
| Processor |
Dual-core ARM Cortex-A9 |
| Tasks |
32 tasks (standard), 1 safety task, 100 programs per task, event tasks supported |
| Communication Ports |
1 USB port (for configuration and programming, not for I/O or redundancy) |
| Communication Protocols |
USB, supports EtherNet/IP, ControlNet, DeviceNet, DH+, Remote I/O with additional modules |
| Maximum I/O Connections |
500 connections |
| Maximum Digital I/O |
128,000 |
| Maximum Analog I/O |
4,000 |
| Maximum Local I/O Modules |
16 (single slot) |
| Maximum Controllers per Chassis |
8 |
| Safety Integrity Level |
Up to SIL 3, Cat. 4 with 1756-L7SP safety partner |
| Isolation |
30 V (continuous), basic insulation type, USB to backplane |
| Terminal Connections |
USB Type B connector |
| Wire Size |
Standard USB cable |
| Operating Temperature |
0°C to 60°C (32°F to 140°F) |
| Storage Temperature |
-40°C to 85°C (-40°F to 185°F) |
| Humidity |
5% to 95% (non-condensing) |
| Vibration Tolerance |
2 G @ 10–500 Hz |
| Shock Tolerance |
30 G (operating), 50 G (non-operating) |
| Dimensions |
145 mm x 35 mm x 140 mm (5.71 in x 1.38 in x 5.51 in) |
| Weight |
0.35 kg (0.77 lb) |
| Standards Compliance |
CE, UL, CSA (Class I, Div 2, Groups A, B, C, D), FM, RCM |
| Certifications |
TUV certified for functional safety (SIL 3) |
| Energy Storage |
1756-ESMCAP (capacitor-based) |
