| 1 | Converter MD-21 AC, Industrial RS-232 - 20mA Current Loop DIN Rail, 19.2k, 115 or 230 VAC Westermo | MD-21 |
| 2 | Power Supply Simatic S7-400, SITOP POWER 5 or analog 6EP1333-1SL11 120/230 V, 24V/5A DC output | 6EP1333-1SL11 (replacement: 6ES7307-1EA01-0AA0) |
| 3 | Power Supply Simatic SITOP POWER 10 or equivalent 6EP1334-2AA00 120/230 V, 24V/10A DC output | 6EP1334-2AA00 ( Successor: 6EP1334-2BA20) |
| 4 | Power pack Simatic, SITOP POWER 20 or equivalent 6EP1336-2BA10 120/230 V, 24V/20A DC output | 6EP1336-2BA10 |
| 5 | CPU CPU 6ES5 928-3UA12 Siemens | 6ES5 928-3UA12 |
| 6 | Electronics Block 6ES5 452-8MR11 | 6ES5 452-8MR11 |
| 7 | Electronics Block 6ES5 452-8MR11 | 6ES5 452-8MR11 |
| 8 | Input unit 6ES5 420-4UA12 for S5-155 | 6ES5 420-4UA12 |
| 9 | Output unit 6ES5 441-4UA12 for S5-155 vers 2 | 6ES5 441-4UA12 |
| 10 | Siemens digital output module 6ES5 451-4UA13 | 6ES5 451-4UA13 |
