SC4x0 Technical manual
Page 30 of 34
SeaCom
Rev
2.00
13. Technical specifications
13.1 Connectors
All connectors are located on the back of the PCB. The PCB is an integrated part of the front part of
the telephone.
For the SC420/P420 this means the box must be opened to get access to the connectors. All screws
are accessed from the rear side.
Connectors are two block of 12 terminals and may be orientated with the cables 180° or 90° angled.
However 180 deg is the only option for the 420-type.
NOTE: If connected as 180deg and relocated as 90deg, all connections are mirrored posing a
great risk of damaging the unit.
Important:
DO NOT remove / dispose the ventilation gland. Applicable for the SC420 only.
Only connect power to power & relay switch inputs, never apply power on any other
terminals.
Always used a fused power supply for relay & power connections and always connect PE.
DO NOT CONNECT SUPPLY 0V TO ANY OTHER TERMINALS BUT RELAY.
USE POTENTIALFREE SWITCHES FOR HOOK & PTT INPUTS
