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User's Manual
79
2.3.4 Alarm Relay Specifications
Table 2-49 Alarm relay specifications
Model: JRC-27F
Material of the touch
Silver
Rating (Resistance
Load)
Rated switch capacity
30 VDC 2 A, 125 VAC 1 A
Maximum switch power
125 VAC, 160 W
Maximum switch voltage
250 VAC, 220 VDC
Maximum switch currency
1 A
Insulation
Between touches with same
polarity
1000 VAC 1 minute
Between touches with different
polarity
1000 VAC 1 minute
Between touch and winding
1000 VAC 1 minute
Surge voltage
Between touches with same
polarity
1500 V (10×160 μs)
Length of open time
3 ms max
Length of close time
3 ms max
Longevity
Mechanical
50 × 106 MIN (3 Hz)
Electrical
200 × 103 MIN (0.5 Hz)
Temperature
-40 °C to +70 °C
2.4 Two-way Talk
2.4.1 Device-end to PC-end
Procedure
Step 1
Connect the speaker or the pickup to the first audio input port on the device rear panel.
Step 2
Connect the earphone or the sound box to the audio output port in the PC.
Step 3
Log in to the web and then enable the corresponding channel real-time monitor.
Step 4
Enable two-way talk.
Summary of Contents for NVR21-4KS3 Series
Page 1: ...Network Video Recorder User s Manual ZHEJIANG DAHUA VISION TECHNOLOGY CO LTD V2 3 5...
Page 97: ...User s Manual 77 Figure 2 118 Alarm input port 1...
Page 123: ...User s Manual 103 S3 NVR41 EI NVR41 P EI NVR41 8P EI Figure 3 48 Typical connection...
Page 129: ...User s Manual 109 Series Figure 3 56 Typical connection...
Page 142: ...User s Manual 122 Figure 5 9 Unlock pattern login...
Page 156: ...User s Manual 136 Figure 5 24 AcuPick human detection...
Page 225: ...User s Manual 205 Figure 5 92 AcuPick human detection...
Page 399: ...User s Manual 379 Figure 5 268 Pattern login...
Page 436: ...User s Manual 416 Figure 5 306 File management Step 2 Click Add Figure 5 307 Add file...
Page 456: ...User s Manual 436 Figure 5 330 Shutdown 2...
Page 485: ...User s Manual...