ELECTRONICS-SALON DIN Rail Mount 2 SPDT Power Relay Interface Module, 10A Relay, 48V Coil.

48V Version, SRU-48VDC-SL-C Power Relays.
LED indicator for each relay channel.
Screw terminal block.
Din rail mountable - for width 35 / 32 / 15mm rails.
High quality PCB carrier.
FR-4 fiber glass PCB.
External dimensions: 50 x 87 x 46mm(L x W x H).
PCB dimensions: 47.4 x 72 ( L x W ).
100% new, never used.

Operating Voltage / Current(max.): 48Vdc / 20mA.
Input control signal voltage:
0V - 0.5Vdc, low level, relay not action.
0.5V - 2.5Vdc, unknown state.
2.5V - 24Vdc, high level, relay action.
Input control signal high level current:
2.5V: 0.1mA.
5V: 0.35mA.
12V: 1.1mA.
20V: 1.9mA.

Relay Spec:
Coil: Voltage: 48V DC, Coil Resistance: 6400 OHM.
Contact Rating: 250VAC / 10A or 30VDC/ 10A.
Type: SRU-48VDC-SL-C.
This is a very simple module board, no paper specifications, any questions, feel free to tell me.

Wire connection and PCB size:
VCC: Power supply input, 48V DC.
GND: Power supply ground and control signal ground.
IN-X: Control signal input, Low: relay not action, High: relay action.
COM / NO / NC:
Control signal state low, the relay OFF, COM - NO disconnected, COM - NC connected.
Control signal stage high, the relay ON, COM - NO connected, COM - NC disconnected.