Emerson 2468CD, 2468CB manual 3b-5, 3B.2.3 ELECTRICAL INSTALLATION, 3b.2.3.1 PCB Interconnections

Hydrastep 2468CB and 2468CD Manual Delay Relay Output Board Option

3B.2.3 ELECTRICAL INSTALLATION

This sub-section deals with the output of the states of the four relays. Two 8-way sockets are provided with each output board through which the relay outputs are delivered to their external destinations.

3b.2.3.1 PCB Interconnections

Signal interconnection between the input board (PCB1) and the output board (PCB 9) is direct via the SK1/PL1 12-way Berg connectors. When two output boards are fitted, the top board’s plug PL1 engages in the lower board’s SK1.

3b.2.3.2 Relay Output Connections

The relay outputs can be taken out of the enclosure via the gland plate (if used) or along with the other cables in suitable trunking.

Use screened cables for all connections, making sure a good annular (ring shape) connection is made with a good quality RF cable gland. The run must be stress-free, and it is considered good practice to twist relay pairs together.

Since the output board is mounted on top of the input board, the routing of the relay cabling should take the same kind of formation as the electrode cabling, but separated from it as far as practical. The cable should be arranged such that the cables do not lie across any of the PCBs. The layout and plug pin details of the two plugs on the relay board is given in the diagram on the right, with the relay contacts shown in their de-energised state.

When two output boards are fitted, the output terminals of the uppermost output board are offset towards the centre of the input board.

View illustrating mounted positions of dual	Relay output PCB
delay relay output boards	connectors

24685034 3b-5