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G8MNY > IBM 18.06.22 11:00l 236 Lines 10420 Bytes #999 (0) @ WW
BID : 24077_GB7CIP
Read: GUEST
Subj: Serial Interface Connections (
Path: IW8PGT<LU4ECL<JE7YGF<GB7CIP
Sent: 220618/0803Z @:GB7CIP.#32.GBR.EURO #:24077 [Caterham Surrey GBR]
From: G8MNY@GB7CIP.#32.GBR.EURO
To : IBM@WW
25 Way D-Type Serial:
1 - NC 7 - Signal Ground
2 - Transmit Data 8 - Carrier Detect 1 13
3 - Receive Data 9-19 - NC x x x x x x x x x x x x x
4 - Request To Send 20 - Data Terminal Ready x x x x x x x x x x x x
5 - Clear To Send 21 - NC 14 25
6 - Data Set Ready 22 - Ring Indicate
23-25 - NC
9 Pin D-Type Serial:
1 - Carrier Detect 6 - Data Set Ready 1 5
2 - Receive Data 7 - Request To Send x x x x x
3 - Transmit Data 8 - Clear To Send x x x x
4 - Data Terminal Ready 9 - Ring Indicate 6 9
5 - Signal Ground
RS-232C INTERFACE STANDARD (25Way)
DTE (e.g. computer) ! DCE (e.g. Modem)
Data Terminal Equipment ! Data Communications Equipment
Signal EIA / CCITT Pin Telephone Co. Signal
Direct Line Name No. Lead No Direction
- Protective Ground 1 AA/101 -
- Signal Ground 7 AB/102 -
- Transmitted Data 2 BA/103 >
< Received Data 3 BB/104 -
- Request to Send 4 CA/105 >
< Clear to Send 5 CB/106 -
< Data Set Ready 6 CC/107 -
- Data Terminal Ready 20 CD/108.2 >
- Connect Data Set to line 20 * /108.1 >
< Received Line Signal Detector 8 CF/109 -
- Speed Select 23 CH/111 >
< Transmit Signal Element Timing 15 DB/114 -
< Receive Signal Element Timing 17 DD/115 -
- Select Standby 11 * /116 >
< Ring Indicator 22 DE/125 -
- Test 18 * /* >
* means non-defined/standardized by EIA / CCITT
Line Loads are not < 3kê, & not > 7kê.
Voltages not >ñ3V & not <ñ15V on load, <ñ24V for no load.
Switched Timing Sequence (dial-up modem line communication)
_________________________________________
Data Terminal Ready ___!
______________________________________
Data Set Ready ______!
_______________________
Request To Send _________! !___________
________________________
Clear To Send ____________! !_______
_________________
Transmitted Data _______________! !___________
Nonswitched Timing Sequence (direct line connection)
_________________________________________
Data Terminal Ready ___!
______________________________________
Data Terminal Ready ______!
_______________________
Request To Send _________! !___________
________________________
Clear To Send ____________! !_______
_____________
Transmitted Data _______________! !_______________
-------------------------------------------------------------------
IBM PC-AT Serial cable DB25 to DB9
serial adapter on computer (cable connector is female)
Signal Direction
25 pin 9 pin Cable-Computer
DB25 DB9 DCE-ADAPTER
8 Carrier Detect 1 >
3 Received Data 2 >
2 Transmitted Data 3 <
20 Data Terminal Ready 4 <
7 Signal Ground 5 -
6 Data Set Ready 6 >
4 Request to send 7 <
5 Clear To Send 8 >
22 Ring Indicator 9 >
All other pins on the 25 pin connector are unused.
--------------------------------------------------------------------
RS232 x connections. Comprehensive RS-232 computer to Tnc cross reference
Jumpers if needed, on a three wire RS232. AT the COMPUTER end only.
--------
DB-25: DE-9:
RTS CTS RTS CTS
4----5 7----8
6----8---20 1----4----6
DSR DCD DTR DCD DTR DSR
RS-232 Serial port "3 Wire" Cable wiring for DB-25 to DE-9 or DE-25.
Computer DB-25 TNC DE-9 TNC(type 2)DB-25s.
TO OR
1 & 7 ----------- 5 ------------- 1
2 --------------- 3 ------------- 2
3 --------------- 2 ------------- 3
---------------------------------------------------------------------
RS-232 Serial port "3 Wire" Cable wiring for DE-9 to DE-9 or DE-25.
Computer DE-9 TNC DE-9 TNC(type 2)DB-25s.
TO OR
5 & Shell ------- 5 ------------ 1
2 --------------- 2 ------------ 3
3 --------------- 3 ------------ 2
------------------------------------------------------------------
"Eight-Wire" RS-232 Cable (conventional)
Computer to TNC
DB-25 or DE-9 to DE-9p or DB-25S
1 shell ---------------- 5 1
2 3 ---------------- 3 2
3 2 ---------------- 2 3
4 7 ---------------- 7 n/c
5 8 ---------------- 8 5
6 6 ---------------- 6 6
7 5 ---------------- 5 7
8 1 ="connected sig" 1 8
20 4 ---------------- n/c 20
------------------------------------------------------------------
Serial Port Cross Reference.
Conventional IBM AT TNC-320 TNC_2
DB-25 p/s De-9P DE-9p DB-25s
pin Function
FGround 1 shell 5 1
Txd 2 3 3 2
RxD 3 2 2 3
RTS 4 7 7 n/c
CTS 5 8 8 5
DSR 6 6 6 6
Sig Earth 7 5 5 7
DCD 8 1 1 (a) 8 (a
test 9 V+ - +12 V
test 10 V- - -12 V
DTR 20 4 n/c 20
RI 22 9 9 (b) (23)
(a) This line goes high when a connection exists.
(b) RFDCD (Also used for multi_node NET/ROM & ROSE)
Why Don't U send an interesting bul?
73 De John, G8MNY @ GB7CIP
SB TECH @ WW
Towing Socket For Caravans
By Fred G4VVQ (Updated Jun 12)
12 N SOCKET CONNECT TO VEHICLE WIRING.
12N STANDARD LOOKING
FROM REAR OF CAR
1 TERMINAL NUMBER CABLE COLOUR 12 N SOCKET
1 / L YELLOW L.H. INDICATOR LAMP
6 2 2 / 54G BLUE REAR FOG LIGHT
7 3 / 31 WHITE CHASSIS EARTH
4 / R GREEN R.H. INDICATOR
5 3 5 / 58R BROWN R.H. TAIL/NO.PLATE LIGHT
4 6 / 54 RED STOP/BRAKE LAMP
/~\ 7 / 58L BLACK L.H. TAIL/NO.PLATE LIGHT
12S SPLIT CHARGE EXTRA LIGHTING
FROM REAR OF CAR
1 1=REVERSING LIGHTS
2=BATTERY CHARGING
6 2 3=EARTH
7 4=INTERIOR LIGHTS
5=SENSING DEVICE USUALLY SPARE
5 3 6=FRIDGE
4 7=SPARE
/~\
ON OLDER CARAVANS PIN 2 MAY BE WIRED FOR INTERNAL CARAVAN LIGHTS
12S SOCKET LOOKING
FROM REAR OF CAR
1 TERM No CABLE COLOUR 12 S SOCKET
1 / L YELLOW REVERSE LAMP(IF REQUIRED REVERSING CATCH)
6 2 2 / 54G BLUE RELAYED+VE(CHARGING BATTERY IN CARAVAN)
7 3 / 31 WHITE CHASSIS EARTH
4 / R GREEN BATTERY+VE VIA 25AMP FUSE(INT LIGHT)VAN
5 3 5 / 58R BROWN NOT USED
4 6 / 54 RED RELAYED+VE(IF REQUIRED FOR REFRIGERATOR)
/~\ 7 / 58L BLACK NOT USED
Fault finding, with 12V circuit tester check for current at pins under flap
when circuits are active, ie brake lights on, & check earth by putting on rear
lamps & connect tester from pin 5 or 7 to pin 3 (earth/white/31)
de Fred...G4VVQ
-------------------------------------------------------------------------------
Comment from Dave VK2AWZ
Hi down in Aus the round towing sockes just about obsolete! All new
fittings have a flat configuration like so OOOOOOOOOOOOO for the pins.
73 - de Dave, VK2AWZ @ VK2DOT
-------------------------------------------------------------------------------
From Wim PA3AKK
Towing Socket For Caravans
(+ = male, o = female, . = thin female)
Feder/Multicon/West Old model Colour
13 - pole 7 - pole wire
.13 o1 .8
o6 +2 1 = left hand indicator lamp 1/L green
.12 +7 .9 2 = rear fog light
+5 o3 3 = chassis earth pin 1 - 8 3/31 brown
.11 o4 .10 4 = right hand indicator lamp 4/R yellow
| 5 = right hand tail / no plate light 5/58R blue
6 = stop / brake lamp 6/54 red
Volta/Jaeger/Hella 7 = left hand tail / no plate light 7/58L black
o8 8 = backwards driving lamp
o7 o9 9 = constant current 2/54G white
o6 o1 o10 10 = loading cable for battery in caravan
o5 o4 o2 o11 11 = not yet in use o1
o3 12 = not yet in use o6 +2
o13 o12 13 = chassis earth pin 9 - 13 +7
[] +5 o3
o4
|
73, Wim, PA3AKK
Also see my TECH bul on "Towing & Reversing Beeper"
Why don't U send an interesting bul?
73 De G8MNY @ GB7CIP
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