108
a. Ensure the decoder has the same grounding with DVR, otherwise you may not control the PTZ.
Shielded twisted wire is recommended and the shielded layer is used to connect to the grounding.
b. Avoid high voltage. Ensure proper wiring and some thunder protection measures.
c. For too long signal wires, 120
Ω
should be parallel connected between A, B lines on the far end
to reduce reflection and guarantee the signal quality.
d. “485 A, B” of DVR cannot parallel connect with “485 port” of other device.
e. The voltage between of A,B lines of the decoder should be less than 5v.
4. Please make sure the front-end device has soundly earthed.
Improper grounding may result in chip damage.
3.8.1 Alarm Input and Output Details
You can refer to the following sheet
X
for alarm input and output information.
Important
Please refer to the specifications for the alarm input and output channel amount. Do not
merely count the alarm input and out channel amount according to the ports on the rear
panel.
3.8.1.1
General
Mini
Series
The 4/8-channel series product interface is shown as below. See Figure 3-1.
AB cable
connection
Summary of Contents for FE8M-DH
Page 1: ...Federal Mini DVR User s Manual Our units do not support PAL...
Page 29: ...119 Federal Mini 2U Series Figure 3 18...
Page 51: ...141 Figure 4 27 Figure 4 28 Figure 4 29...
Page 56: ...146 Figure 4 34 Figure 4 35 Figure 4 36...
Page 64: ...154 Figure 4 52...
Page 68: ...158 Figure 5 3 Figure 5 4 Figure 5 5 Figure 5 6...
Page 76: ...166 Figure 5 16 Figure 5 17 Figure 5 18 5 3 5 3 NTP Setup...
Page 117: ...207 Figure 6 11...
Page 187: ...277 Maxtor DiamondMax 20 STM3250820AS 250G SATA...
