evertz 7700 - Connecting the Optional Temperature Probe; Table 2-8: GPIO Maximum Ratings; Table 2-9: Temperature Probe Extender Cable

7700 Multiframe Manual
7725DSK-LG / 7725DSK-LG-HD HD/SD Logo Inserter & Media Keyer
Page 2-12 Revision 1.4 INSTALLATION
Table 2-8 shows the maximum limits that the user must adhere to so that no circuitry is damaged.
Description Name Value
Maximum GP+3.3V current load
I
GP+3.3V
max
100 mA
Minimum input voltage for a high
V
gpi
high min
3 V
Maximum input voltage for a low
V
gpi
low max
0.8 V
Maximum GPO sink current
I
gpo
max
25 mA
Table 2-8: GPIO Maximum Ratings
2.9. CONNECTING THE OPTIONAL TEMPERATURE PROBE
The 7725DSK-LG is available with an optional temperature probe that is used to input data for display
in a temperature logo. Consult the temperature probe manual for information on installing the
temperature probe. Connect the temperature probe power adapter to the probe unit. Connect the
temperature probe to the COM D or COM C, connector on the 7725DSK-LG. The temperature probe
ships with an adapter cable to convert its RJ-45 connector to a standard 9 pin D connector. The RJ45
plugs into the temperature probe. You will need to create a straight-through 9 pin male to female cable
of the desired length according to the diagram in Table 2-5 to connect the probe to the 7725DSK-LG.
The serial port on the 7725DSK-LG must be set for RS-232 operation as described in section 2.1.3.
"
The temperature probe cable should not exceed 1000 feet.
7725DSK-LG End Temperature Probe End
9 pin D
Male Pin
Belden
9729
9 pin D
Female Pin
1 1
TxD
2
-------1a------ RxD
2
RxD
3
-------1b------ TxD
3
4
Rx Gnd
4
Gnd
5
---drain 1---- Gnd
6 6
7 7
8 8
9 9
Frame
Gnd
Shield
---drain 2---- Frame
Gnd
Shield
Table 2-9: Temperature Probe Extender Cable