O T H E R I N T E R F A C E S - Dahua Smart Box Series User Manual

T+ T-: output wire
R+ R-: input wire
JRC-27F
Model:
Silver
Material of the
touch
Rating Rated switch capacity
R esistance
（
Maximum switch power
Load ）
Maximum switch voltage
Maximum switch currency
Insulation Between touches with same
polarity
Between touches with different
polarity
Between touch and winding
Between touches with same
Surge voltage
polarity
Length of open 3ms max
time
3ms max
Length of close
time
Longevity
Mechanical
Electrical
Temperature -40
3.8 3.8 RS485 RS485
3.8 3.8 RS485 RS485
When the DVR receives a camera control command, it transmits that command up the coaxial
cable to the PTZ device. RS485 is a single-direction protocol; the PTZ device can't return any
data to the unit. To enable the operation, connect the PTZ device to the RS485 (A,B) input on
the DVR.
Since RS485 is disabled by default for each camera, you must enable the PTZ settings first.
This series DVRs support multiple protocols such as Pelco-D, Pelco-P.
To connect PTZ devices to the DVR:
1. Connect RS485 A,B on the DVR rear panel.
2. Connect the other end of the cable to the proper pins in the connector on the camera.
3. Please follow the instructions to configure a camera to enable each PTZ device on the
DVR.
3.9 3.9 Other Interfaces Other Interfaces
3.9 3.9 Other Interfaces Other Interfaces
There are still other interfaces on the DVR, such as USB ports.
Relay Specification
~+70
Standalone DVR User's Manual
30VDC 2A, 125VAC 1A
125VA 160W
250VAC, 220VDC
1A
1000VAC 1minute
1000VAC 1minute
1000VAC 1minute
1500V (10×160us)
50×106 times (3Hz)
200×103 times (0.5Hz)
130