Doepfer CTM64 Relay Board - Manual (Page 4)

JP1 (16 pin connector)
This pin header is connected to one of the pin headers JP1 (range 1...16), JP2 (range
17...32), JP3 (range 33...48) or JP4 (range 49...64) on the CTM64 main board. For the
connection a 16 pin ribbon cable with a female connector on each side is used. Up to four
relay boards can be combined with one CTM64 main board. Connecting the cable in the
wrong to JP1...JP4 on the CTM64 main board will cause no damage. Only the sequence of
the inputs will be mixed up.
X1 ... X16 (2 pin screw terminals)
These are the control inputs of the 16 relays. Each terminal corresponds to one relay and
has to be connected to the controlling contact (e.g. momentary switch or toggle switch) with
a simple two-pole cable. The contacts are simple on/off switches. Cables up to 100m have
been tested but probably even longer cables are possible.