Nederman E-PAK 500 DX Hybrid Manuel D'instruction page 28

EN E-PAK 500 DX Hybrid
NOTE! Ensure that the connection matches the actual supply voltage. The
secondary voltage is always 24 V AC.
NOTE! Use a jumper on terminals 3–4 if a PS cable is NOT used.
6.2
28
The start and control unit has the following components:
1. Transformer (TR1).
The transformer is a multi-transformer with terminals for several different
supply voltages, marked on the upper side of the transformer.
2. Reset relay (K5).
3. Transformer, primary fuses F2 and F3, both 6 A.
4. Timer for Y/D switching (K4T).
5. Y-contactor (K3).
6. D-contactor (K2).
7. Main contactor (K1).
8. Motor overload relay with manual reset button (S1F).
9. Grounding cables.
10. Emergency switch for 3-phase supply.
11. Terminals 1 and 2 for 24 V AC accessory supply. Fuse F5 on terminal 1, 1
A, fast.
12. Terminals 3 and 4 for the Pilot Signal (PS) cable. Fuse F6 on terminal 3, 1
A, fast.
13. Other terminals required by some accessories, all 24 V AC.
14. Transformer secondary fuse F4, 4 A, slow.
15. Filter Cleaning Relay (FCR). Normal settings: T
16. Start/Stop Relay (SSR) for automatic start and stop by means of a PS
cable. Normal setting=10 minutes.
17. Duty/Idle Relay (DIR) for automatic switching to idling mode. Normal
setting =30 seconds.
For details about fuses and settings for the overload relay, see Section
5.3 Technical and electrical data.
Accessories
The installation of Nederman accessories for E-PAK 500 DX Hybrid is described
in the manuals for each product. Consult your local Nederman representative
for available accessories.
The E-PAK 500 DX Hybrid start and control unit is prepared for the connection
of external accessories or signals. The signals/accessories are connected
according to the electric circuit diagram, see Figure 19. See also 'Table 6-1:
Accessory terminals'.
The most common accessory is a PS cable which allows remote start/stop
signalling from the valves of the duct system.
Table 6-1: Accessory terminals
Terminal Accessory/function description
1–2 Permanent 24 V AC of external equipment
3–4 Pilot signal
=4 s. T =1 h.
on off