MDS 05-6906A01, Rev. R
TD220MAX Technical Manual
7
Table 3. Current Consumption vs Input Power and Duty Cycle
Voltage (V)
RF Power Out (W)
Duty Cycle (%)
Current Required (A)
Thermal
Dissipation (W)
12
0 (RX)
0
0.3
3.6
12
2
100
1.4
14
12
10
30
3.6
14
12
25
30
6.3
15
13.8
0 (RX)
0
0.3
4
13.8
2
100
1.2
14
13.8
10
30
3.2
14
13.8
25
30
5.5
15
3.5 Grounding Considerations
To minimize the chance of damage to the transceiver and connected equipment, a safety ground (NEC
Class 2 compliant) is recommended which bonds the antenna system, transceiver, power supply, and
connected data equipment to a
single-point
ground, keeping all ground leads as short as possible.
Normally, the transceiver is adequately grounded if the supplied flat mounting brackets are used to mount
the radio to a well-grounded metal surface. If the transceiver is not mounted to a grounded surface, it is
recommended that a safety ground wire be attached to one of the mounting brackets or a screw on the
transceiver’s case.
The use of a lightning protector is recommended where the antenna cable enters the building; bond the
protector to the tower ground, if possible. All grounds and cabling must comply with applicable codes and
regulations.
3.6 Data Interface (DB-25)
The Data Interface has several ports integrated into one connector: Ethernet, COM1 and COM2 Serial
Ports, and GPS signaling.
Figure 7. COM Connector (DB-25F)
As viewed from outside the unit
Summary of Contents for MDS TD220MAX
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