Telenetics Network Card MOT202T User Manual

Modems  
MOT202T  
“Born-Again”  
UDS/Motorola 202T  
Introducing the latest addition to the Telenetics®  
family of industrial grade, temperature hardened  
modems, the MOT202T is a pin-for-pin, form, fit  
and function replacement for the Motorola/UDS  
Model RM16M202T.  
2-wire half duplex or 4-wire full duplex  
private line operation  
0 to 1200 bps data rate over unconditional  
lines and 1800 over high quality lines  
Anti-streaming  
A must for industrial applications, the MOT202T  
(Standalone) features built-in diagnostic, anti-  
streaming, multi-power inputs (115 to 240AC, 12 to  
125VDC) and -40ºC to +80ºC operating range capabilities.  
Phase coherent, frequency shift keyed  
(FSK) modulation  
LED indicators  
The modem operates over leased or dedicated, loaded  
or unloaded lines equal to or better than the ITU  
(formerly CCITT) M.1020/1025 or the BELL 3002 leased  
line services. It operates over point-to-point or  
multi-point polled systems and operates in full or  
half-duplex over 4-wire or 2-wire circuits.  
Front panel rotary switch function selector  
Integral test features  
12, 24, 48, 125VDC Power (Rack)  
115VAC, 60Hz - 220/240VAC 50 Hz  
power (Standalone)  
The modem employs circuitry to prevent data and carrier detect errors over noisy lines. In multi-drop systems  
it is very common to have noise spikes and other harmful high frequency components caused by carrier turn-offs  
from other modems on the same line. The modem uses a combination of soft-carrier generation and soft-carrier  
detection in conjunction with a signal to noise ratio (SNR) detector to eliminate errors caused by line noise.  
The MOT202T’s anti-streaming capability prevents a modem from remaining in the transmit mode when the modem is  
not actively transmitting date. In addition, the MOT202T allows users to verify transmitted and received data  
via the diagnostic feature.  
The MOT202T interchangeable design between the Universal Data Shelf multiple modem enclosure (RM16M series)  
and the standalone modem enclosure, enables the modem to be directly inserted in the Universal Data Shelf when  
the optional front panel is attached. Thus, data-communications facility can easily upgrade from front  
multiple standalone enclosures to a centralized rack without the expense and trouble of purchasing new modems.  
 
Power edge  
connector  
A 12-pin edge connector located at the  
left side of the modem board. This  
connector supplies the modem board with  
power from the standalone case or the  
modem rack. Header H1 is located on top  
of P1.  
Digital Data edge P2 is a 25-pin edge connector located at  
connector  
the backend of the modem board. The eleven  
signals routed to and from this connector  
are the RS 232 data interface signals.  
Pin RS 232 V.24  
Function  
circuit  
circuit  
1
2
3
4
5
6
7
8
AA  
BA  
BB  
CA  
CB  
CC  
AB  
CF  
101  
103  
104  
105  
106  
107  
102  
109  
----  
----  
----  
Protective Ground  
Transmitted Data  
Received Data  
Request To Send  
Clear To Send  
Data Set Ready  
Signal Ground  
Data Carrier Detect  
+ 12 Volt.Test only  
- 12 Volt.Test only  
Analog Loop back  
Pin Voltage Function  
Header H1 Pin  
10  
12  
8
+ 15 VDC  
- 15 VDC  
Transformer 20 VAC  
Transformer 20 VAC  
2
1
Center Tap Transformer center tap 3 & 4  
4
6
+ 8.5 VDC Transformer 10 VAC  
+ 8.5 VDC Transformer 10 VAC  
6
5
2
GND  
Chassis Ground  
n.c.  
9
10  
25  
----  
----  
----  
Modem Board Selective Jumper Options  
Operational Settings  
Modem Timing  
Data Carrier Detect Level  
RTS/CTS Delay  
- 30 dBm  
- 45 dBm  
8 ms  
33 ms  
59 ms  
219 ms  
Transmit Level  
0 dBm  
- 2 dBm  
Data Carrier Detect Delay  
- 4 dBm  
6 ms  
- 6 dBm  
23 ms  
- 8 dBm  
Turnaround Squelch Time  
83 ms  
159.6 ms  
- 10 dBm  
- 12 dBm  
- 14 dBm  
Soft Carrier Timing  
No Soft Carrier  
8.3 ms  
Line Connection  
2- wire  
4- wire  
26.6 ms  
Turnaround Squelch  
In  
Out  
Anti-Streaming Time  
4 ms  
7.6 ms  
14 ms  
28 ms  
56 ms  
Out  
Transmit Carrier  
RTS Control  
Constant Carrier  
Local Copy Squelch  
No Local Copy  
Local Copy  
Test Generator Baud rate  
*Specifications are subject to change without notice  
1
18  
37  
75  
150  
For more information on Telenetics’ wireless  
products and services, call:  
949-455-4000 or visit  
w w w.telenetics.com  
Chassis GND Option  
Chassis GND and Signal GND not connected  
Chassis GND and Signal GND connected together  
25111 Arctic Ocean Drive  
Lake Forest, CA 92630  
tel. 949.455.4000 fax. 949.455.4010  
Document #0071 0700  
Telenetics is registered trademark of Telenetics Corporation.  
All other trademarks are the property of their respective holders. ©2000  
 

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