
Hydrastep 2468CB and 2468CD Manual | Relay Output Board Option |
3A.3.1 RELAY OUTPUT BOARD
3a.3.1.1 Configuring the Relay Output Board
WARNING Mains voltages are present in this instrument when power is connected.
1.Isolate the 2468 electronics enclosure from its power supplies.
2.Gain access to the relay output PCB and set the relevant switches for the required function.
3a.3.1.2 Electrode/Relay Selection (Relays RL1, RL2, RL3 & RL4) - SW1 To SW4
Four identical switches are provided on the relay board for electrode selection. Any of the electrodes, connected to the input board on which the relay board is mounted, can be selected as the input for any of the relays.
With one input board installed, any electrode connected to the system can be used as the source for any of the four relays. With two input boards installed, the relay board mounted on the input board connected to the odd numbered electrodes, accepts inputs from the odd numbered electrodes. Similarly, the relay board mounted on the input board connected to the even numbered electrodes, accepts inputs from even numbered electrodes. Table 3a.1 details switch selection.
| Switch SW1, SW2, SW3 or SW4 |
|
| Electrode Selection |
| |||
Settings for RL1 to RL4 respectively |
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| Switch Contacts |
| One Input | Two Input Cards | |||
1 |
| 2 | 3 |
| 4 | Card | Odd I/P Card | Even I/P Card |
On |
| On | On |
| On | 1 | 1 | 2 |
Off |
| On | On |
| On | 2 | 3 | 4 |
On |
| Off | On |
| On | 3 | 5 | 6 |
Off |
| Off | On |
| On | 4 | 7 | 8 |
On |
| On | Off |
| On | 5 | 9 | 10 |
Off |
| On | Off |
| On | 6 | 11 | 12 |
On |
| Off | Off |
| On | 7 | 13 | 14 |
Off |
| Off | Off |
| On | 8 | 15 | 16 |
On |
| On | On |
| Off | 9 | 17 | 18 |
Off |
| On | On |
| Off | 10 | 19 | 20 |
On |
| Off | On |
| Off | 11 | 21 | 22 |
Off |
| Off | On |
| Off | 12 | 23 | 24 |
On |
| On | Off |
| Off | 13 | 25 | 26 |
Off |
| On | Off |
| Off | 14 | 27 | 28 |
On |
| Off | Off |
| Off | 15 | 29 | 30 |
Off |
| Off | Off |
| Off | 16 | 31 | 32 |
Table 3a.1 - Electrode selections for relays RL1 to RL4
Example: Single Input Board: Electrode 13 selected.
Dual Input Boards: Odd input board - Electrode 25 selected Even input board - Electrode 26 selected. OFF
1 2 3 4
24685034 |
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