ABB RELION REX640 Technical Manual page 162

Section 3
Basic functions
156
A single signal contact is rated for a continuous current of 5 A. It has a make and carry
for 0.5 seconds at 15 A.
When two contacts are connected in parallel, the relay is of a different design. It has
the make and carry rating of 30 A for 0.5 seconds. This can be applied for energizing
breaker close coil and tripping coil. Due to the limited breaking capacity, a breaker
auxiliary contact can be required to break the circuit.
Static signal outputs (SSO1, SSO2) are light-duty fast binary signal outputs and can
also be used as pulse outputs.
GUID-256173DD-E348-4DDB-BE81-C4A329C3A21B V1 EN
Figure 47: Signal outputs in power supply module
1MRS759142 C
REX640
Technical Manual