Patton electronic Marine Battery 2017P60 RS 232 to 60mA User Manual

USER  
MANUAL  
MODEL 2017P  
RS-232 to 20mA and  
MODEL 2017P60  
RS-232 to 60mA  
Current Loop Converters  
07M2017P-E  
Doc# 073051UE  
Revised 5/7/96  
SALES OFFICE  
(301) 975-1000  
TECHNICAL SUPPORT  
(301) 975-1007  
 
3.0 CONFIGURATION  
4.0 INSTALLATION  
The Model 2017P 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 Model 2017P is simple to install. After configuring the  
DTE/DCE switch, connect the two twisted pairs using one of three  
methods: terminal blocks with strain relief, RJ-11 jack or RJ-45 jack.  
The method you use will depend on the specific model you have.  
The diagram 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 ("S" model only).  
4.1 TWISTED PAIR WIRING OVERVIEW  
Only one Model 2017P is needed for each RS-232 to 20mA (or  
60mA) current loop circuit. The Model 2017P is connected to the  
current loop device using two twisted pairs. The pairs must be "dry"  
(unconditioned) metallic wire, 19 - 26 AWG. Best distance is achieved  
with larger gauges. When you have completed wiring for your data  
circuit, the pin connections should be as shown below:  
DCE/DTE  
Switch  
Terminal  
Block  
XMT +  
XMT -  
G
RCV +  
RCV -  
RCV+  
RCV -  
G
XMT +  
XMT -  
One Pair  
One Pair  
}
}
Opto  
Isolator  
To Shield (Optional)  
Opto  
Isolator  
4.1.1 TWISTED PAIR CONNECTION USING TERMINAL BLOCKS  
3.1 SETTING THE DCE/DTE SWITCH  
The terminal block/strain relief version of the Model 2017P allows  
you to hook up the line side interface using bare wires. The following  
instructions will tell you how to open the case, connect the bare wires  
and fasten the strain relief collar in place.  
For your convenience, the Model 2017P has an externally  
accessible DCE/DTE switch (see diagram below). If the RS-232 device  
connected to the Model 2017P is a modem or multiplexer (or is wired  
like one), set the switch to "DTE". This setting causes the Model 2017P  
to behave like Data Terminal Equipment and transmit data on pin 2.  
1. Open the unit by gently inserting a screw driver between the  
DB-25 connector and the lip of the plastic case (see below). You don't  
have to worry about breaking the plastic, but be careful not to bend the  
D-sub connector.  
If the RS-232 device connected to the Model 2017P is a PC,  
terminal or host computer (or is wired like one), set the switch to "DCE".  
This setting causes the Model 2017P to behave like Data  
Communications Equipment and transmit data on pin 3.  
DCE  
DTE  
3
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6. If there is a shield around the telephone cable, it may be  
connected to "G" on the terminal block. To avoid ground loops, we  
recommend connecting the shield at the computer end only. A ground  
wire is not necessary for proper operation of these units.  
7. When you finish connecting the wires to the terminal block, the  
assembly should resemble the diagram below:  
Once the unit has been opened, you will be able to see the  
terminal blocks located at the rear of the PC board.  
2. Strip the outer insulation from the twisted pairs about one inch  
from the end.  
8. Place the 2 halves of the strain relief assembly on either side of  
the telephone wire and press together very lightly. Slide the assembly  
so that it is about 2 inches from the terminal posts and press together  
firmly. If your cable diameter is too small or too large for our strain  
relief, please contact our technical support. We have strain relief  
assemblies to accommodate most cable diameters.  
3. Strip back the insulation on each of the 2 twisted pair wires  
about .25".  
4. Connect one pair of wires in the telephone cable to "XMT"  
(Transmit) on the terminal block, being careful to observe the polarity.  
(The wire connected to "XMT+"must be connected at the other end of  
the telephone line to "RCV+" in the other unit and the wire connected to  
"XMT-" must be connected at the other end of the telephone line to  
"RCV-" in the other unit).  
5. Connect the other pair of wires in the telephone cable to "RCV"  
(Receive), again being careful to observe the polarity. (The wire  
connected to "RCV+" must be connected at the other end of the  
telephone line to "XMT+" in the other unit and the wire connected to  
"RCV-" must be connected at the other end of the telephone line to  
"XMT-" in the other unit).  
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4.1.2 TWISTED PAIR CONNECTION USING MODULAR JACKS  
9. Insert the strain relief assembly with the wire going through it  
into the slot in the bottom half of the modem case and set it into the  
recess in the case.  
The modular versions of the Model 2017P have an RJ-11 or RJ-45  
jack mounted in the case. These jacks are prewired for a standard  
TELCO wiring environment. To be sure you have the right wiring, use  
the table below as a guide.  
RJ-11  
SIGNAL  
RJ-45  
SIGNAL  
1----------------GND†  
2----------------RCV-  
3----------------XMT+  
4----------------XMT-  
5----------------RCV+  
6----------------GND  
1 --------------N/C  
2 --------------GND  
3 --------------RCV-  
4 --------------XMT+  
5 --------------XMT-  
6 --------------RCV+  
7 --------------GND  
8 --------------N/C  
Connection to ground is optional  
10. BEND the top half of the case as necessary to place it over the  
strain relief assembly. Do not snap the case together yet.  
1 - Blue  
2 - Orange  
3 - Black  
4 - Red  
1 - Blue  
2 - Yellow  
3 - Green  
4 - Red  
5 - Green  
6 - Yellow  
7 - Brown  
8 - Slate  
5 - Black  
6 - White  
AT&T standard modular color codes  
4.2 COMPLETING THE INSTALLATION  
Once you have configured the unit for DTE or DCE and connected  
the twisted pair wires correctly, simply plug the Model 2017P into the  
RS-232 data port. Remember to insert and tighten the two captive  
connector screws.  
11. Insert one captive screw through a saddle washer and then  
insert the captive screw with the washer on it, through the hole in the  
DB-25 end of the case. Snap that side of the case closed. Repeat the  
process for the other side. This completes the cable installation  
process.  
The Model 2017P requires no power supply or batteries for  
operation. It will work automatically at any data rate from 50 to 19,200  
bps, as long as there is any data or control voltage being applied.  
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APPENDIX A  
APPENDIX B  
SPECIFICATIONS  
RS-232C PIN CONFIGURATIONS  
Transmission Line: 19 to 26 AWG twisted pair  
DIRECTION  
STANDARD "DCE" SETTING  
DIRECTION  
Range: 4 miles on 24 AWG twisted pair  
1- (FG) Frame Ground  
2- (TD) Transmit Data  
3- (RD) Receive Data  
4- (RTS) Request to Send  
5- (CTS) Clear to Send  
6- (DSR) Data Set Ready  
7- (SG) Signal Ground  
To Mdl 2017P  
From Mdl 2017P  
To Mdl 2017P  
Interfaces: Asynchronous, EIA RS-232, CCITT V.24 full duplex,  
20mA current loop (Model 2017P60 connects to 60mA current loop)  
From Mdl 2017P  
From Mdl 2017P  
Data Rates: 0 - 115.2 Kbps  
To Mdl 2017P  
Data Term. Ready (DTR) - 20  
8- (DCD) Data Carrier Detect  
From Mdl 2017P  
Isolation: 2500V RMS via opto-isolators  
Surge Suppression: Over-voltage protection for opto-isolators via  
Silicon Avalanche Diodes  
Connectors: DB-25 male or female on RS-232 side; RJ-11, RJ-45  
or terminal block with strain relief on current loop side  
DIRECTION  
STANDARD "DTE" SETTING  
DIRECTION  
Power Supply: No external power required; uses power from NIC  
data signals  
1- (FG) Frame Ground  
2- (TD) Transmit Data  
3- (RD) Receive Data  
From Mdl 2017P  
To Mdl 2017P  
From Mdl 2017P  
To Mdl 2017P  
To Mdl 2017P  
Temperature Range: 0-50°C (32-122°F)  
Altitude: 0-15,000 feet  
4- (RTS) Request to Send  
5- (CTS) Clear to Send  
6- (DSR) Data Set Ready  
7- (SG) Signal Ground  
8- (DCD) Data Carrier Detect  
Humidity: Up to 95% non-condensing  
Dimensions: 2.50"L x 1.2"H x 0.75"W  
Weight: 1.5 oz  
From Mdl 2017P Data Term. Ready (DTR) - 20  
To Mdl 2017P  
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APPENDIX C  
BLOCK DIAGRAM  
11  
 

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