MDS 05-3301A01, Rev. C
MDS 9810 Installation and Operation Guide
17
and Pin 7 (signal ground). Figure 14 shows a detailed view of the
DATA INTERFACE
connector.
If hardware flow control is desired, Pin 4 (request to send—RTS)
and Pin 5 (Clear-to-Send—CTS) are also required. A detailed chart
of pin functions is provided in Table 15 on Page 59.
Invisible place holder
Figure 14. Transceiver Interface Connector Pins
(As viewed from outside the radio)
NOTE:
The data cabling between the transceiver and the connected
device should be kept as short as possible. Cable runs over 50
feet (15 meters) may require the use of EIA-422 signaling.
Consult the factory for details.
4. Measure and install the primary power for the transceiver. It must be
within 10.5–30 Vdc* and be capable of furnishing up to 500 mA. Be
sure to observe proper polarity. The red wire on the power cable is
the positive lead; the black is negative.
* Transceivers shipped prior to Revision “U” (November 1999) may be
configured for 25 Vdc maximum DC input voltage.
NOTE:
The radio is designed for use only in negative ground systems.
Additionally, the chassis must be bonded to an Earth ground,
either directly, through its mounting bracket, or via the antenna
system ground (coaxial shield). The radio may be damaged if
the chassis is not properly grounded per this recommendation.
Radios damaged in this way will not be covered under
warranty.
The power supply used with the transceiver should be equipped
with overload protection (NEC Class 2 rating), to protect against a
short circuit between its output terminals and the transceiver power
connector.
5. Set the radio’s configuration using a Hand-Held Terminal (HHT).
Review Section 6.0, PROGRAMMING (beginning on Page 28), if
you are unfamiliar with connecting and using the HHT.
Unused
Radio Inhibit (Sleep)
Unused
13
12
11
10
9
8
7
6
5
4
3
2
1
Receiver Unsquelched Sensor
Unused
Data Carrier Detect (DCD)
Signal Ground*
Data Set Ready (DSR)
Clear-to-Send Output (CTS)
Request-to-Send Input (RTS)
Received Data (RXD)*
Transmitted Data (TXD)*
Protective Ground
25
24
23
22
21
20
19
18
17
16
15
14
Alarm Output
Analog Input Pin
Diagnostic Channel Enable
RSSI Voltage
9.9 Vdc Regulated Output
Unregulated DC Input/Output
Digital Output Pin
Unused
Unused
Unused
Pin
Description
Pin
No.
Pin
No.
Pin
Description
Unused
Future use— do not connect
* Required in most installations
