ELECTRONICS-SALON 16 SPDT Power Relay Module, DC 48V Coil, 10A 250VAC/30VDC, Board.

This item has been assembled, and electrical test passed.
LED indicator for each relay channel.
2N5551 transistor driving relay.
FR-4 Fiber glass PCB ( Double Layer ).
PCB thickness: 1.6mm.
Size: 296 x 72 x 25mm / 11.65 x 2.83 x 1 inch.

Power Supply: DC 48V / 160mA (relay all ON).
Input control signal voltage:
0V ~ 0.4V Low stage (relay not action).
0.4V ~ 3.3V (unknown state).
3.3V ~ 24V High state (relay action).
Input control signal high state current:
3.3V: 0.6mA.
5V: 0.9mA.
12V: 2.4mA.
24V: 5mA.

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 OFF, High: relay ON.
COM / NO / NC: (C1=COM1, C2=COM2)
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.

Datasheet: