background image

DB-25 connector and the lip of the plastic case (see Figures 4 and 5,
below).  You don't have to worry about breaking the plastic, but be
careful not to bend the D-sub connector.

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 as shown in Figure 6.  

3.  Strip the insulation on each of the twisted pair wires about .25"

as shown in Figure 7.

4.  Connect 

one pair

of wires to XMT+ and XMT- (transmit positive

and negative) on the terminal block, making careful note of which color
is positive, and which color is negative.

5.  Connect the 

other pair

of wires to RCV+ and RCV- (receive

positive and negative) on the terminal block, again making careful note
of which color is positive and which color is negative.

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 one end only.  A ground wire is 

not

necessary

for proper operation of the Model 1000.

7.  When you finish connecting the wires to the terminal block, the

assembly should resemble the diagram in Figure 8, below:  

10

Figure 11.

Connecting the Case Halves 

4.1.2  TWISTED PAIR CONNECTION USING TERMINAL BLOCKS

If your RS-232 application requires you to connect two pairs of

bare wires to the Model 1000, you will need to open the case to access
the terminal blocks.  The following instructions will tell you how to open
the case, connect the bare wires to the terminal blocks, and fasten the
strain relief collar in place so that the wires won't pull loose.

1.  Open the unit by gently inserting a screwdriver between the

9

+RCV

- G -XMT+

Figure 9:

Re-connecting the Strain Relief Assembly

Figure 10:

Positioning the Model 1000 Inside the Plastic Case

Содержание 1000

Страница 1: ... 1000S Ultra Miniature Asynchronous Short Range Modems SALES OFFICE 301 975 1000 TECHNICAL SUPPORT 301 975 1007 http www patton com Part 07M1000 C Doc 023021U Rev D Revised 1 22 08 C E R T I F I E D An ISO 9001 Certified Company ...

Страница 2: ......

Страница 3: ...ontainer This number may be obtained from Patton Electronics Technical Service at 301 975 1007 http www patton com or support patton com NOTE Packages received without an RMA number will not be accepted Patton Electronics technical staff is also available to answer any questions that might arise concerning the installation or use of your Model 1000 Technical Service hours 8AM to 5PM EST Monday thr...

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Страница 5: ... section 4 0 The only configuration necessary for operation is proper setting of the external DCE DTE switch Figure 1 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 DCE DTE Surge Suppressors 1000S only Terminal Block DCE DTE DCE DTE Switch Figure 1 Location of Key Components on Model 1000 Printed Cir...

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Страница 7: ... end of a two twisted pair interface 2 To function properly the Model 1000 needs two twisted pair of metallic wire The pairs must be unconditioned dry metallic wire between 19 and 26 AWG 4mm to 9mm the higher number gauges may limit distance Standard dial up telephone circuits or leased circuits that run through signal equalization equipment are not acceptable For your convenience the Model 1000 i...

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Страница 9: ...nation of the two SIGNAL PIN COLOR COLOR PIN SIGNAL GND 1 Blue White 6 GND RCV 2 Yellow Red 4 XMT XMT 3 Green Black 5 RCV XMT 4 Red Yellow 2 RCV RCV 5 Black Green 3 XMT GND 6 White Blue 1 GND Connection to ground is optional Standard color codes yours may be different 8 RCV G XMT XMT RCV XMT RCV G G RCV XMT RCV XMT To Shield Optional One Pair One Pair Figure 7 Stripping the Insulation from Each Tw...

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Страница 11: ...MT transmit positive and negative on the terminal block making careful note of which color is positive and which color is negative 5 Connect the other pair of wires to RCV and RCV receive positive and negative on the terminal block again making careful note of which color is positive and which color is negative 6 If there is a shield around the telephone cable it may be connected to G on the termi...

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Страница 13: ... the Model 1000 for DTE or DCE and connected the twisted pair wires correctly simply plug the Model 1000 directly into the DB 25 port of the RS 232 device After doing so remember to insert and tighten the two captive connector screws Note If you must use a cable to connect the Model 1000 to the RS 232 make sure it is a straight through cable of the shortest possible length we recommend 6 feet or l...

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Страница 15: ...RANSMITTED DATA CLAMPED TO 1v p p RCV 1 RCV 2 GND 3 XMT 4 XMT SURGE PROTECTION SURGE PROTECTION OUTPUT BUFFER OUTPUT BUFFER 5 T E R M I N A L S T R I P SCHMIT TRIGGER ACTIVE FILTER SURGE PROTECTION SURGE PROTECTION NOTE SIGNAL FLOW THROUGH THE DB 25 IS SHOWN FOR THE MODEL 1000 IN DCE MODE RCV LINE IS HELD NEGATIVE WITH RESPECT TO RCV WHEN NO SIGNAL IS BEING RECEIVED POWER SUPPLY DATA V V MODEL 100...

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