Difference between revisions of "10369"
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[[Image:10369_bottom_sm.jpeg|frame|[[Media:10369_bottom.jpeg|10369 board, bottom view]]]] | [[Image:10369_bottom_sm.jpeg|frame|[[Media:10369_bottom.jpeg|10369 board, bottom view]]]] | ||
[[Image:10369_bd.jpeg|frame|[[Media:10369a.pdf|10369 Circuit Diagram, Parts List, PCB layout]] [[Media:10369a_gerber.tar.gz|10369 Gerber files]]]] | [[Image:10369_bd.jpeg|frame|[[Media:10369a.pdf|10369 Circuit Diagram, Parts List, PCB layout]] [[Media:10369a_gerber.tar.gz|10369 Gerber files]]]] | ||
+ | |||
+ | [[Image:103691_sm.jpeg|frame|[[Media:103691.jpeg|103691: Dual CF card adapter/riser board]]]] | ||
+ | [[Image:103692_sm.jpeg|frame|[[Media:103692.jpeg|103692: 1.8" ZIF-type HDD adapter board]]]] | ||
+ | [[Image:103693_sm.jpeg|frame|[[Media:103693.jpeg|103693: External USB connector adapter board]]]] | ||
+ | |||
10369 interface board is an extension board for the [[353|Elphel 353/363 series cameras]]. | 10369 interface board is an extension board for the [[353|Elphel 353/363 series cameras]]. | ||
* It provides multiple interfaces and peripherals to the camera: | * It provides multiple interfaces and peripherals to the camera: | ||
Line 8: | Line 13: | ||
** Compact Flash (in "True IDE" mode) and IDE HDD ports (with adapter/riser boards: 103691, 103692) | ** Compact Flash (in "True IDE" mode) and IDE HDD ports (with adapter/riser boards: 103691, 103692) | ||
** RS-232 port | ** RS-232 port | ||
− | ** Opto-isolated I/O port for synchronizing the camera or synchronizing together multiple cameras (modular | + | ** Opto-isolated I/O port for synchronizing the camera or synchronizing together multiple cameras (modular RJ14 external connector) |
** Opto-isolated I/O port for synchronizing multiple camera modules in the same enclosure (flex cable connectors) | ** Opto-isolated I/O port for synchronizing multiple camera modules in the same enclosure (flex cable connectors) | ||
** Digital thermometer with internal ("system") and external thermal sensor (emitter-base junction of PNP or NPN transistor) | ** Digital thermometer with internal ("system") and external thermal sensor (emitter-base junction of PNP or NPN transistor) | ||
Line 20: | Line 25: | ||
===== J1 - AUX ===== | ===== J1 - AUX ===== | ||
− | {| class="wikitable" style="background:# | + | {| class="wikitable" style="background:#fcfcfc; " border="1" |
|+ AUX connector (from 10353) | |+ AUX connector (from 10353) | ||
|- | |- | ||
Line 62: | Line 67: | ||
===== J2 - IDE ===== | ===== J2 - IDE ===== | ||
− | {| class="wikitable" style="background:# | + | {| class="wikitable" style="background:#fcfcfc; " border="1" |
|+ IDE connector (from 10353) | |+ IDE connector (from 10353) | ||
|- | |- | ||
Line 113: | Line 118: | ||
===== J3 - Power ===== | ===== J3 - Power ===== | ||
− | {| class="wikitable" style="background:# | + | {| class="wikitable" style="background:#fcfcfc; " border="1" |
|+ Power connector (from 10353) | |+ Power connector (from 10353) | ||
|- | |- | ||
Line 129: | Line 134: | ||
===== J4 - Power (optional - to the next boards) ===== | ===== J4 - Power (optional - to the next boards) ===== | ||
− | {| class="wikitable" style="background:# | + | {| class="wikitable" style="background:#fcfcfc; " border="1" |
|+ Power connector (optional - to the next boards) | |+ Power connector (optional - to the next boards) | ||
|- | |- | ||
Line 145: | Line 150: | ||
===== J5 - Power (optional 3.3V in) ===== | ===== J5 - Power (optional 3.3V in) ===== | ||
− | {| class="wikitable" style="background:# | + | {| class="wikitable" style="background:#fcfcfc; " border="1" |
|+ Power connector (optional 3.3V in) | |+ Power connector (optional 3.3V in) | ||
|- | |- | ||
Line 164: | Line 169: | ||
===== J6 - IDE (to adapter/riser) ===== | ===== J6 - IDE (to adapter/riser) ===== | ||
− | {| class="wikitable" style="background:# | + | {| class="wikitable" style="background:#fcfcfc; " border="1" |
|+ IDE connector to adpaters/risers (103691, 103692) | |+ IDE connector to adpaters/risers (103691, 103692) | ||
|- | |- | ||
Line 225: | Line 230: | ||
===== J7 - SATA ===== | ===== J7 - SATA ===== | ||
− | {| class="wikitable" style="background:# | + | {| class="wikitable" style="background:#fcfcfc; " border="1" |
|+ SATA 7-pin connector to HDD | |+ SATA 7-pin connector to HDD | ||
|- | |- | ||
Line 250: | Line 255: | ||
===== J8 - USB0 (to external) ===== | ===== J8 - USB0 (to external) ===== | ||
− | {| class="wikitable" style="background:# | + | {| class="wikitable" style="background:#fcfcfc; " border="1" |
|+ USB to 103693 adapter - external connector | |+ USB to 103693 adapter - external connector | ||
|- | |- | ||
Line 281: | Line 286: | ||
===== J9 - USB1 (to internal) ===== | ===== J9 - USB1 (to internal) ===== | ||
− | {| class="wikitable" style="background:# | + | {| class="wikitable" style="background:#fcfcfc; " border="1" |
|+ USB , i2c, GPIO, 3.3V power to extension boards | |+ USB , i2c, GPIO, 3.3V power to extension boards | ||
|- | |- | ||
Line 312: | Line 317: | ||
===== J10 - USB2 (to internal) ===== | ===== J10 - USB2 (to internal) ===== | ||
− | {| class="wikitable" style="background:# | + | {| class="wikitable" style="background:#fcfcfc; " border="1" |
|+ USB , i2c, GPIO, 3.3V power to extension boards | |+ USB , i2c, GPIO, 3.3V power to extension boards | ||
|- | |- | ||
Line 342: | Line 347: | ||
---- | ---- | ||
− | ===== J11 - | + | ===== J11 - USB4 (to internal) ===== |
− | {| class="wikitable" style="background:# | + | {| class="wikitable" style="background:#fcfcfc; " border="1" |
|+ USB , i2c, GPIO, 3.3V power to extension boards | |+ USB , i2c, GPIO, 3.3V power to extension boards | ||
|- | |- | ||
Line 370: | Line 375: | ||
|} | |} | ||
− | + | ||
− | + | ---- | |
− | + | ||
+ | ===== J12 - SYNC (internal, master) ===== | ||
+ | {| class="wikitable" style="background:#fcfcfc; " border="1" | ||
+ | |+ Interboard synchronization I/O, master, bottom contacts | ||
+ | |- | ||
+ | ! Pin !! Signal !! Notes | ||
+ | |- | ||
+ | | 1 || GND || Driver return | ||
+ | |- | ||
+ | | 2 || ISYNCDR || Driver output | ||
+ | |- | ||
+ | | 3 || ISYNC1 || Optoisolated I/O | ||
+ | |- | ||
+ | | 4 || ISYNC2 || Optoisolated I/O return | ||
+ | |- | ||
+ | |} | ||
+ | '' '''Note:''' Connect J12 to J14 on the next camera in chain with a 4-conductor flex jumper, then from J13 of that next camera to the next in chain's J14, and so on. J12 and J13 have contacts on the bottom side, J14 - on the top to simplify chaining.'' | ||
+ | |||
+ | |||
+ | ---- | ||
+ | |||
+ | ===== J13 - SYNC (internal, slave) ===== | ||
+ | {| class="wikitable" style="background:#fcfcfc; " border="1" | ||
+ | |+ Interboard synchronization I/O, slave, bottom contacts | ||
+ | |- | ||
+ | ! Pin !! Signal !! Notes | ||
+ | |- | ||
+ | | 1 || ISYNC2 || Optoisolated I/O return | ||
+ | |- | ||
+ | | 2 || ISYNC1 || Optoisolated I/O | ||
+ | |- | ||
+ | | 3 || ISYNC1 || Optoisolated I/O | ||
+ | |- | ||
+ | | 4 || ISYNC2 || Optoisolated I/O return | ||
+ | |- | ||
+ | |} | ||
+ | '' '''Note:''' Connect J12 to J14 of the next camera module in chain.'' | ||
+ | |||
+ | |||
+ | ---- | ||
+ | |||
+ | ===== J14 - SYNC (internal, slave) ===== | ||
+ | {| class="wikitable" style="background:#fcfcfc; " border="1" | ||
+ | |+ Interboard synchronization I/O, slave, top contacts | ||
+ | |- | ||
+ | ! Pin !! Signal !! Notes | ||
+ | |- | ||
+ | | 1 || ISYNC2 || Optoisolated I/O return | ||
+ | |- | ||
+ | | 2 || ISYNC1 || Optoisolated I/O | ||
+ | |- | ||
+ | | 3 || ISYNC1 || Optoisolated I/O | ||
+ | |- | ||
+ | | 4 || ISYNC2 || Optoisolated I/O return | ||
+ | |- | ||
+ | |} | ||
+ | '' '''Note:''' Connect J14 to J13 of the previous camera module in chain (if the previous is not the master). If it is the master, connect J14 to the master's J12 instead of the J13'' | ||
+ | |||
+ | |||
+ | ---- | ||
+ | |||
+ | ===== J15 - SYNC (external) ===== | ||
+ | {| class="wikitable" style="background:#fcfcfc; " border="1" | ||
+ | |+ Intercamera synchronization I/O, modular RJ-14 | ||
+ | |- | ||
+ | ! Pin !! Signal !! Notes | ||
+ | |- | ||
+ | | 1 || GND || Driver return | ||
+ | |- | ||
+ | | 2 || XSYNC1 || Optoisolated I/O | ||
+ | |- | ||
+ | | 3 || XISYNC2 || Optoisolated I/O return | ||
+ | |- | ||
+ | | 4 || XSYNCDR || Driver output | ||
+ | |- | ||
+ | |} | ||
+ | '' '''Note:''' In order to synchronize multiple cameras connect the pins 2 on all cameras together, same for all the pins 3. Additionally connect pin 1 on the 'master' (synchronization source) camera to pin 3, pin 4 - with pin2.'' | ||
+ | |||
+ | |||
+ | ---- | ||
+ | |||
+ | ===== J16 - RS-232 ===== | ||
+ | {| class="wikitable" style="background:#fcfcfc; " border="1" | ||
+ | |+ Serial RS-232 port, modular RJ-25 | ||
+ | |- | ||
+ | ! Pin !! Signal !! Notes | ||
+ | |- | ||
+ | | 1 || XCTS || CTS | ||
+ | |- | ||
+ | | 2 || XRXD || RxD | ||
+ | |- | ||
+ | | 3 || GND || | ||
+ | |- | ||
+ | | 4 || GND || | ||
+ | |- | ||
+ | | 5 || XTXD || TxD | ||
+ | |- | ||
+ | | 6 || XRTS || RTS | ||
+ | |- | ||
+ | |} | ||
+ | |||
+ | |||
+ | ---- | ||
+ | |||
+ | ===== J17 - Fan ===== | ||
+ | {| class="wikitable" style="background:#fcfcfc; " border="1" | ||
+ | |+ Optional Fan connection (3.3V/5.0V) | ||
+ | |- | ||
+ | ! Pin !! Signal !! Notes | ||
+ | |- | ||
+ | | 1 || FANPOS || Fan positive terminal | ||
+ | |- | ||
+ | | 2 || GND || Fan negative terminal | ||
+ | |- | ||
+ | |} | ||
+ | '' '''Note:''' Default configuration supports 3.3VDC fans, in order to switch to 5.0V you need to open (cut trace) jumper JP2 and close (solder together terminals of) jumper JP1.'' | ||
+ | |||
+ | |||
+ | ---- | ||
+ | |||
+ | ===== W2-W4 - Terminals fro external temperature sensor ===== | ||
+ | {| class="wikitable" style="background:#fcfcfc; " border="1" | ||
+ | |+ Solder terminals for optional thermal sensor | ||
+ | |- | ||
+ | ! Pin !! Signal !! Notes | ||
+ | |- | ||
+ | | W2 || TSNSP || Thermal sensor positive | ||
+ | |- | ||
+ | | W3 || TSNSP || Thermal sensor positive | ||
+ | |- | ||
+ | | W3 || GND || connect to sensor cable shield | ||
+ | |- | ||
+ | |} | ||
+ | '' '''Note:''' small NPN (i.e. 2N3904) or PNP (i.e. 2N3906) can be used as an external sensor. Connect NPN base (or PNP emitter) to W2, NPN emitter (or PNP base) to W3 (W4 may be connected to the shield around these two wires that shoul be twisted). If no sensor is used W2 and W3 should be connected together to enable fan control.'' |
Revision as of 13:31, 25 June 2008
Contents
- 1 10369
- 1.1 Connectors
- 1.1.1 J1 - AUX
- 1.1.2 J2 - IDE
- 1.1.3 J3 - Power
- 1.1.4 J4 - Power (optional - to the next boards)
- 1.1.5 J5 - Power (optional 3.3V in)
- 1.1.6 J6 - IDE (to adapter/riser)
- 1.1.7 J7 - SATA
- 1.1.8 J8 - USB0 (to external)
- 1.1.9 J9 - USB1 (to internal)
- 1.1.10 J10 - USB2 (to internal)
- 1.1.11 J11 - USB4 (to internal)
- 1.1.12 J12 - SYNC (internal, master)
- 1.1.13 J13 - SYNC (internal, slave)
- 1.1.14 J14 - SYNC (internal, slave)
- 1.1.15 J15 - SYNC (external)
- 1.1.16 J16 - RS-232
- 1.1.17 J17 - Fan
- 1.1.18 W2-W4 - Terminals fro external temperature sensor
- 1.1 Connectors
10369
10369 interface board is an extension board for the Elphel 353/363 series cameras.
- It provides multiple interfaces and peripherals to the camera:
- SATA port for external disk drives
- Compact Flash (in "True IDE" mode) and IDE HDD ports (with adapter/riser boards: 103691, 103692)
- RS-232 port
- Opto-isolated I/O port for synchronizing the camera or synchronizing together multiple cameras (modular RJ14 external connector)
- Opto-isolated I/O port for synchronizing multiple camera modules in the same enclosure (flex cable connectors)
- Digital thermometer with internal ("system") and external thermal sensor (emitter-base junction of PNP or NPN transistor)
- Fan driver, controlled by the digital thermometer with programmable on/off temperature
- Clock/calendar with the super-capacitor backup power
- EEPROM for the board identification and configuration
Connectors
J1 - AUX
Pin | Signal | Notes | Pin | Signal | Notes | |
---|---|---|---|---|---|---|
1 | GND | 2 | GND | |||
3 | EXT[0] | GPIO | 4 | EXT[2] | GPIO | |
5 | EXT[1] | GPIO | 6 | EXT[3] | GPIO | |
7 | GND | 8 | GND | |||
9 | EXT[4] | GPIO | 10 | EXT[6] | GPIO | |
11 | EXT[5] | GPIO | 12 | EXT[7] | GPIO | |
13 | GND | 14 | GND | |||
15 | EXT[8] | GPIO | 16 | EXT[10] | GPIO | |
17 | EXT[9] | GPIO | 18 | EXT[11] | GPIO | |
19 | GND | 20 | GND | |||
21 | CTS | RS232 | 22 | RTS | RS232 | |
23 | RXD | RS232 | 24 | TXD | RS232 | |
25 | VP33 | +3.3V | 26 | VP33 | +3.3V | |
27 | U0VM | USB | 28 | U0VP | USB | |
29 | VP33 | +3.3V | 30 | VP33 | +3.3V |
J2 - IDE
Pin | Signal | Notes | Pin | Signal | Notes | |
---|---|---|---|---|---|---|
1 | IDE_RST | 2 | GND | |||
3 | IDE_D[7] | 4 | IDE_D[8] | |||
5 | IDE_D[6] | 6 | IDE_D[9] | |||
7 | IDE_D[5] | 8 | IDE_D[10] | |||
9 | IDE_D[4] | 10 | IDE_D[11] | |||
11 | IDE_D[3] | 12 | IDE_D[12] | |||
13 | IDE_D[2] | 14 | IDE_D[13] | |||
15 | IDE_D[1] | 16 | IDE_D[14] | |||
17 | IDE_D[0] | 18 | IDE_D[15] | |||
19 | GND | 20 | GND | |||
21 | IDE_DMARQ | 22 | GND | |||
23 | IDE_IOW | 24 | GND | |||
25 | IDE_IOR | 26 | GND | |||
27 | IDE_IORDY | 28 | GND | |||
29 | IDE_DMACK | 30 | GND | |||
31 | IDE_INTRQ | 32 | EXT_OE | not used | ||
33 | IDE_A[1] | 34 | -- | |||
35 | IDE_A[0] | 36 | IDE_A[2] | |||
37 | IDE_CS0 | 38 | IDE_CS1 | |||
39 | -- | 40 | GND |
J3 - Power
Pin | Signal | Notes | Pin | Signal | Notes | |
---|---|---|---|---|---|---|
1 | GND | 3 | VP33 | +3.3V | ||
2 | LPWR48M | -48V, isolated, primary | 4 | LPWR48P | +48V, isolated, primary |
Note: +/- 48V are non-regulated input power rails. For 12V or 24V camera modifications these lines will also have +/-12V or +/-24V.
J4 - Power (optional - to the next boards)
Pin | Signal | Notes | Pin | Signal | Notes | |
---|---|---|---|---|---|---|
1 | GND | 3 | VP33 | +3.3V | ||
2 | LPWR48M | -48V, isolated, primary | 4 | LPWR48P | +48V, isolated, primary |
Note: J4 is normally not installed. It is used in some camera modificatios where ther is another board on top of the 10369 that needs power - J4 is located oppposite to J3, same as on 10353 system board.
J5 - Power (optional 3.3V in)
Pin | Signal | Notes |
---|---|---|
1 | GND | |
2 | VP33 | +3.3V |
3 | LPWR48M | -48V, isolated, primary |
4 | LPWR48P | +48V, isolated, primary |
Note: J5 is normally not installed. It may be used in multi-camera systems to provide 3.3V from the commomn to all camera modules power supply (DC-DC converter on 10353 should not be installed).
J6 - IDE (to adapter/riser)
Pin | Signal | Notes | Pin | Signal | Notes | |
---|---|---|---|---|---|---|
1 | CF1PRESENT | GND if CF1 installed | 2 | GND | ||
3 | IDE_D[11] | 4 | IDE_D[3] | |||
5 | IDE_D[12] | 6 | IDE_D[4] | |||
7 | IDE_D[13] | 8 | IDE_D[5] | |||
9 | IDE_D[14] | 10 | IDE_D[6] | |||
11 | IDE_D[15] | 12 | IDE_D[7] | |||
13 | IDE_CS1 | 14 | IDE_CS0 | |||
15 | -- | 16 | -- | |||
17 | IDE_IOR | 18 | GND | |||
19 | IDE_IOW | 20 | -- | |||
21 | -- | 22 | -- | |||
23 | IDE_INTRQ | 24 | -- | |||
25 | +3.3V | 26 | +3.3V | |||
27 | GND | 28 | EXT[0](SCL) | |||
29 | RST_CFS | Reset master | 30 | EXT[0](SDA) | ||
31 | RST_CFM | Reset slave | 32 | IDE_A[2] | ||
33 | IDE_IORDY | 34 | -- | |||
35 | IDE_DMARQ | 36 | IDE_A[2] | |||
37 | IDE_DMACK | 38 | IDE_A[1] | |||
39 | IDE_DASP | 40 | IDE_A[0] | |||
41 | IDE_PDIAG | 42 | IDE_D[0] | |||
43 | IDE_D[8] | 44 | IDE_D[1] | |||
45 | IDE_D[9] | 46 | IDE_D[2] | |||
47 | IDE_D[10] | 48 | -- | |||
49 | GND | 50 | CF0PRESENT | GND if CF0 installed |
J7 - SATA
Pin | Signal | Notes |
---|---|---|
1 | GND | |
2 | SATATP | Transmit + |
3 | SATATM | Transmit - |
4 | GND | |
5 | SATARM | Receive - |
6 | SATARP | Receive + |
7 | GND |
J8 - USB0 (to external)
Pin | Signal | Notes |
---|---|---|
1 | GND | System ground, needs series inductor (on 103693) |
2 | DP1 | USB data + |
3 | DM1 | USB data - |
4 | PW1 | USB +5V power (switched) |
5 | GND | |
6 | EXT[0] | i2c SCL |
7 | EXT[1] | i2c SDA |
8 | EXT[6] | GPIO |
9 | EXT[7] | GPIO |
10 | P3_1 | +3.3V power |
J9 - USB1 (to internal)
Pin | Signal | Notes |
---|---|---|
1 | GND | |
2 | DP2 | USB data + |
3 | DM2 | USB data - |
4 | PW2 | USB +5V power (switched) |
5 | GND | |
6 | EXT[0] | i2c SCL |
7 | EXT[1] | i2c SDA |
8 | EXT[2] | GPIO |
9 | EXT[3] | GPIO |
10 | P3_2 | +3.3V power |
J10 - USB2 (to internal)
Pin | Signal | Notes |
---|---|---|
1 | GND | |
2 | DP3 | USB data + |
3 | DM3 | USB data - |
4 | PW3 | USB +5V power (switched) |
5 | GND | |
6 | EXT[0] | i2c SCL |
7 | EXT[1] | i2c SDA |
8 | EXT[4] | GPIO |
9 | EXT[5] | GPIO |
10 | P3_3 | +3.3V power |
J11 - USB4 (to internal)
Pin | Signal | Notes |
---|---|---|
1 | GND | |
2 | DP4 | USB data + |
3 | DM5 | USB data - |
4 | PW4 | USB +5V power (switched) |
5 | GND | |
6 | EXT[0] | i2c SCL |
7 | EXT[1] | i2c SDA |
8 | EXT[6] | GPIO |
9 | EXT[7] | GPIO |
10 | P3_4 | +3.3V power |
J12 - SYNC (internal, master)
Pin | Signal | Notes |
---|---|---|
1 | GND | Driver return |
2 | ISYNCDR | Driver output |
3 | ISYNC1 | Optoisolated I/O |
4 | ISYNC2 | Optoisolated I/O return |
Note: Connect J12 to J14 on the next camera in chain with a 4-conductor flex jumper, then from J13 of that next camera to the next in chain's J14, and so on. J12 and J13 have contacts on the bottom side, J14 - on the top to simplify chaining.
J13 - SYNC (internal, slave)
Pin | Signal | Notes |
---|---|---|
1 | ISYNC2 | Optoisolated I/O return |
2 | ISYNC1 | Optoisolated I/O |
3 | ISYNC1 | Optoisolated I/O |
4 | ISYNC2 | Optoisolated I/O return |
Note: Connect J12 to J14 of the next camera module in chain.
J14 - SYNC (internal, slave)
Pin | Signal | Notes |
---|---|---|
1 | ISYNC2 | Optoisolated I/O return |
2 | ISYNC1 | Optoisolated I/O |
3 | ISYNC1 | Optoisolated I/O |
4 | ISYNC2 | Optoisolated I/O return |
Note: Connect J14 to J13 of the previous camera module in chain (if the previous is not the master). If it is the master, connect J14 to the master's J12 instead of the J13
J15 - SYNC (external)
Pin | Signal | Notes |
---|---|---|
1 | GND | Driver return |
2 | XSYNC1 | Optoisolated I/O |
3 | XISYNC2 | Optoisolated I/O return |
4 | XSYNCDR | Driver output |
Note: In order to synchronize multiple cameras connect the pins 2 on all cameras together, same for all the pins 3. Additionally connect pin 1 on the 'master' (synchronization source) camera to pin 3, pin 4 - with pin2.
J16 - RS-232
Pin | Signal | Notes |
---|---|---|
1 | XCTS | CTS |
2 | XRXD | RxD |
3 | GND | |
4 | GND | |
5 | XTXD | TxD |
6 | XRTS | RTS |
J17 - Fan
Pin | Signal | Notes |
---|---|---|
1 | FANPOS | Fan positive terminal |
2 | GND | Fan negative terminal |
Note: Default configuration supports 3.3VDC fans, in order to switch to 5.0V you need to open (cut trace) jumper JP2 and close (solder together terminals of) jumper JP1.
W2-W4 - Terminals fro external temperature sensor
Pin | Signal | Notes |
---|---|---|
W2 | TSNSP | Thermal sensor positive |
W3 | TSNSP | Thermal sensor positive |
W3 | GND | connect to sensor cable shield |
Note: small NPN (i.e. 2N3904) or PNP (i.e. 2N3906) can be used as an external sensor. Connect NPN base (or PNP emitter) to W2, NPN emitter (or PNP base) to W3 (W4 may be connected to the shield around these two wires that shoul be twisted). If no sensor is used W2 and W3 should be connected together to enable fan control.