MEDC CU1 - Manual (Page 6)

Type 5.
The supply should be connected to T1 (+ve) & T2 (-ve), loop out on T3, T4 respectively. The initiate supply
should be connected to T5 (+ve / live) & T6 (-ve / neutral), loop out on T7 & T8 respectively.
Type 6.
The supply should be connected to T1 (sounder +ve), T2 (common -ve1) & T3 (common -ve2), loop out on
T4, T5 & T6 respectively. The independent +ve supply for the beacon should be connected to T7, loop out on T8.
Type 7.
The supply should be connected to T1 (L) & T2 (N), loop out on T3 & T4 respectively.
Type 8.
The supply should be connected to T1 (L) & T2 (N), loop out on T3 & T4 respectively. The initiate supply
should be connected to T5 (+ve / live) T6 (-ve / neutral), loop out on T7 & T8 respectively.
Type 9.
The supply for the sounder should be connected to T1 (L) & T2 (N), loop out on T3 & T4 respectively.
The supply for the beacon should be connected to T5 (L) & T6 (N), loop out on T7 & T8 respectively
The dual stage units can be switched between the two stages by either:
a. Reversing the polarity of the supply (2 wire connection), or
b. Connecting as a three wire common +ve system and switching between the two –ve lines
i.e. with T1 (+ve) & T2 (-ve), stage 1 is active
a. With T1 (-ve) & T2 (+ve) stage 2 is active or
b. With T1 (+ve) & T3 (-ve) stage 2 is active
Note:
With type 5 units (see details above), the dual stage sounder will only be connected with 2 wires and the
second stage can only be selected by reversing the polarity (option a. above)
Tone Selection:
On the AC input units, the required tone is selected by means of a 5-way DIL switch mounted on the top face of the
xenon PCB assembly
On the DC input units, tone 1 & 2 are selected using the two 5-way DIL switches (marked SW1 & SW2) mounted
on the top face of the xenon PCB assembly
09/14 © MEDC 2014