
Hydrastep 2468CB and 2468CD Manual | Delay Relay Output Board Option |
3B.3.1 DELAY RELAY OUTPUT BOARD
3b.3.1.1 Configuring the Delay 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 delay relay output PCB and set the relevant switches for the required function.
3b.3.1.2 Electrode/Relay Selection (Relays RL1, RL2, RL3 & RL4) - SW1 to SW4
Four identical switches are provided, one for each relay (but see SW6) each having four sets of contacts. This allows coded selection for one of 16 electrodes for each switch and therefore for each relay in the case of the single input card. When dual input cards are fitted, odd numbered electrodes feed into one input card with the even numbered electrodes being fed into the other input card. Each input card then offers any mounted relay output card the choice from its electrode inputs, with the resultant selectivity as shown in Table 3b.1.
Switch SW1, 5W2, 5W3 or 5W4 Settings for |
| Electrode Selection |
| |||||
| 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 | Ii | 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 3b.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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