3.0 CONFIGURATION
The Model 1010A is designed to be easy to use. There are no
internal jumpers or DIP switches to set, so there is no need to open the
case to configure the unit (you may need to open the case for wire
connection—refer to section 4.0). The only configuration necessary for
operation is proper setting of the external DCE/DTE switch.
The figure below shows the location of the DCE/DTE switch on the
PC board, as well as the location of the terminal block and surge
suppressors.
3.1 SETTING THE DTE/DCE SWITCH
For your convenience, the Model 1010A has an externally
accessible DCE/DTE switch (see figure below). If the device connected
to the Model 1010A is a modem or multiplexer (or is wired like one), set
the switch to "DTE". This setting causes the Model 1010A to behave
like Data Terminal Equipment and transmit data on pin 2.
If the device connected to the Model 1010A is a PC, terminal or
host computer (or is wired like one), set the switch to "DCE". This
setting causes the Model 1010A to behave like Data Communications
Equipment and transmit data on pin 3.
3
DCE
DTE
DCE/DTE
Switch
Surge
Suppressors
DCE
DTE
Terminal
Block
Transformers
APPENDIX B
SPECIFICATIONS
Transmission Format: Asynchronous, full duplex
Transmission Line: Two unconditioned twisted pair 19 - 26 AWG
Range: (See table below)
Interfaces: EIA RS-232, CCITT V.24
Data Rates: 50 - 115.2 Kbps
Isolation: Minimum 1500 V RMS via custom transformers
Surge Protection: 600W power dissipation at 1 mS;
component response time of 1 pS; installed response time of 2 µs
Dimensions: 2.66" x 2.10" x 0.73"
Factory Switch Setting: DCE (transmits from RS-232 on pin 3)
Control Signals: DSR and DCD follow DTR from the terminal
(DTE); CTS follows RTS from the terminal (DTE)
Connectors: DB-25 male or female on RS-232 side;
RJ-11, RJ-45 or terminal block with strain relief on
line side
Power Supply: None required; uses power from EIA data and
control signals
Temperature Range: 0-60°C (32-140°F)
Altitude: 0-15,000 feet
Humidity: Up to 95% non-condensing
Weight: 2 oz.
10
Data
Rate
115,200
0.6
0.45
0.3
57,600
2.0
1.5
1.0
38,400
2.4
1.8
1.2
19,200
2.6
2.0
1.2
9,600
4.0
2.5
1.6
4,800
5.0
3.5
2.2
2,400
6.8
4.7
3.2
1,200
8.5
5.7
3.8
Model 1010A Distance Table (miles)
Wire Gauge
19
24
26
