Connecting External Control Terminals - Samsung SNC-1300 User Manual

Chapter 3. Installing Camera & Network Setup
Chart 3-1. Copper Wire's Electric Resistance at [20ºC (68ºF)]
Copper Wire Gauge(AWG) #24(0.22㎡) #22(0.33㎡)
Resistance (Ω/m) 0.078
Drop Voltage (V/m) 0.028
· As shown in the Chart 3-1, voltage drop may occur depending on the length of a copper wire:
excessively lengthening the adapter cable may decrease the performance of the camera.
※ Recommended Camera Operation Voltage: DC 12V±10% or AC 24V±10%
※ Voltage drop measurements on the chart above may vary depending on the type of copper wires and their
manufacturers.
Caution
• When the camera is connected to both PoE and the power adapter, it uses power from the first
connected power supply.
■ PoE (Power over Ethernet)
PoE (Power over Ethernet) is a network technology that uses a LAN cable to transfer electric
power along with data. It eliminates the necessity for an extra power cable for network
products.
When using PoE, please make sure to connect the camera to a device that complies with the
PoE standard: IEEE802.3af. Failure to follow this recommendation may result in low
performance or damage to the camera.

3.4. Connecting External Control Terminals

Available terminals for external control devices are from left to right: Alarm Input, Alarm
Output, Ground, RS-485 '+' and RS-485 '-'.
To connect a cable, insert the stripped end to a terminal while holding down the square
button. Releasing the button fastens the cable.
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NETWORK CAMERA
#20(0.52㎡) #18(0.83㎡)
0.050 0.030 0.018
0.018 0.011 0.006
① Alarm Input
② Alarm Output
③ Ground
④ RS-485 '+'
⑤ RS-485 '-'
User Guide
■ Connecting Alarm Input
Please refer to the wiring diagram below to connect an alarm input device.
3.3V
120
5.1K
Ω
Ω
Inside the
Camera
Sensor Input
10K
Ω
· When selecting Normal Open at the setup menu :
Activates the sensor input depending on the connection type: short circuit for the contact
type and the "Low" level for dynamic.
· When selecting Normal Close at the setup menu :
Activates the sensor input depending on the connection type: Open for the contact type
and the "High Impedance (Open Collector)" for dynamic.
NETWORK CAMERA
Alarm In
Sensor
GND
29
User Guide