Amcrest AMDV4M4 User Manual

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• RS485 A/B cable is for the A/B cable of the PTZ decoder. T+,T-,R+,R- are four-wire double duplex RS485
port.
T+ T-: output wire
R+ R-: input wire
Relay Specification
Model:
JRC-27F
Material
Silver
Rating
(Resistance Load)
Rated switch capacity
30VDC 2A, 125VAC 1A
Maximum switch power
125VA 160W
Maximum switch voltage
250VAC, 220VDC
Maximum switch currency
1A
Insulation
Between contacts with same polarity
1000VAC 1 minute
Between contacts with different
polarity
1000VAC 1 minute
Between contacts and winding
1000VAC 1 minute
Surge voltage
Between contacts with same polarity
1500V (10×160us)
Length of open
time
3ms maximum
Length of close
time
3ms maximum
Longevity
Mechanical
50×106 times (3Hz)
Electrical
200×103 times (0.5Hz)
Temperature
-40°C~+70°C
3.3.5 RS485 Port
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.
Below is a diagram of the 32-channel alarm I/O ports:

Amcrest AMDV4M4 Specifications

General

Brand	Amcrest
Model	AMDV4M4
Category	DVR
Language	English