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Datasheets and User Guides

App Notes

Software & Driver


22.0 OEM Versions

For pricing/ordering, go to the main T7 Product Page.

The OEM version of the T7 and T7-Pro are shown below.  The enclosure, and most connectors are not installed on the OEM version, which allows customers to choose custom connectors.


The following list describes parts that we know to be compatible with the T7 OEM hole patterns.  Simply select a connector from each category, and we can order the parts and construct a custom OEM. Custom OEM boards carry additional cost, but they are often necessary for specialized enclosures, and seamless integration with other products. 

Of course there are many other connector options available; we can just as easily order/install something not mentioned below. Please don't hesitate to contact us.

The PCB Dimensions can be found in the Enclosure and PCB Drawings section. 

Note: Proper ESD precautions should be taken when handling the PCB directly. Many of the parts are ESD resistant, but depending on the size of the shock, or location, the board might be damaged.



The USB connector is not installed on the T7 OEM. Reference the T7 PCB dimensions for mechanical mating details. Many through-hole Type-B USB connectors are compatible. On Shore Technology Inc USB-B1HSW6FCI 61729-0010BLF, and TE Connectivity 292304-2 are all good options.  The USB connector must be installed on the component side of the PCB.

A special high-retention connector such as the Samtec USBR-B-S-S-O-TH can also be used, but it does take a good deal of force to unplug a cable from these so they are only recommended when you don't want to unplug very often.

It is also possible to simply solder the wires directly, using the image below as a reference. 

A normal USB cable has a shield, and the normal Type-B connector connects the cable shield to the mounting tabs on the connector which are then soldered into the large USB mounting holes on the PCB.  If you are not using a normal USB connector, and have a shield in your USB cable, we recommend that the shield be connected to either of the large USB mounting holes on the PCB. Usually the USB shield wires are aluminum, which doesn't take solder very well, so use a crimp connector like the Molex 02-06-2103, TE 61388-1, TE 350015-2, or the TE 60017-3.  Secure the crimp connector to USB shield wires, then squish down the tip of the connector to fit into the large USB mounting holes on the PCB.


J5 - Alternate Power Supply

The USB connector is a good way to bring in power, even with some sort of custom cable, but if you do not want the USB connector installed J5 provides alternate connections to supply 5V to the T7. The square shaped pad is V+, and the circular pad is GND. It is useful for individuals who only need Ethernet or WiFi. The J5 connector is a 2 pin 0.1" pitch rectangular header. To prevent accidentally switching V+ and GND, use a keyed connector such as TE Connectivity 3-641215-2.

Table 22-1. J5 pinout

1 V+

The 5V supply from J5 (Vext) is protected by a TVS (transient voltage suppressor diode), then goes through R21 (0.1 ohms), and then connects to the Vsupply bus.  The 5V supply from USB (Vusb) is protected by a TVS, goes through R15 (0.1 ohms), and then connects to the Vsupply bus.  On all variants of the T7, R15 & R21 are both installed by default, and thus the connections for both sources are essentially shorted to each other, and both should not be connected to a source at the same time as one could back-feed the other.  If you are going to connect to J5, and there is a possibility of power at the USB connection also, remove R15.  You can also replace R15 and R21 with diodes (SMA package) to prevent back-feeding, but even Schottky diodes will have a small voltage drop that needs to be considered.

Vsupply then connects to the input of a current limiting chip (Diodes AP2141WG), the output of that chip goes through an EMIFIL (EMI suppression filter), and the output of that connects to the device-wide VS bus.  The T7 can be powered by connecting a source to a VS terminal, but that is not recommended as all the previously mentioned protection is bypassed.



The same Ethernet connector is installed on all versions of the T7 due to the inherent magnetic complexities. However, it is possible to 'bring out' a duplicate Ethernet jack to any custom enclosure with one of the following:

  • A short Ethernet cable segment and an RJ45 coupler (Plug to Plug).  These couplers come in a few varieties: Free hanging (in-line), Chassis Mount, Panel Mount, Bulkhead, Wall Plate, etc. Conec 33TS3101S-88N and Emerson 30-1008KUL are both good options.
  • A RJ45 Jack to Plug cable, which is just a standard Ethernet plug on one end, and a Jack (female) on the other end.  Again, these come in a wide variety of mounting styles, the simplest of which is the panel mount. TE Connectivity 1546414-4 and Amphenol RJFEZ2203100BTX are both good options.

If selecting your own Ethernet interconnect, insure that it is RJ45, straight-through, and without magnetics.


WiFi Antenna

T7-Pro-OEM ships with a simple 30mm U.FL whip antenna such as the Anaren 66089-2406. See "Antenna Details" in the WiFi section of this datasheet for additional information.


JP1-JP6 - Screw terminal Locations

The screw terminals are not installed on the OEM T7. Customers will typically use the rectangular header locations (J2, J3) instead of the screw terminals. However, if a different screw terminal style is required, it is possible to buy an OEM T7 and order a custom variety. The screw terminal holes are compatible with almost all 4 position, 0.198" (5.00mm) pitch terminal blocks. A Weidmuller 9993300000 works quite well, and accepts 14-24 AWG wire.


P2, P3 - DB(D-Sub) Locations

The DB15 and DB37 connectors are not installed on an OEM T7. Customers will typically use the rectangular header locations (J2, J3) instead of the DB connectors. However, if a different DB mating style is required, it is possible to buy an OEM T7 and order a custom variety. The DB connectors are standard D-Sub two row receptacles (female sockets), through hole, 15 pin, and 37 pin. The following represent a few valid options.


J2, J3 - Header Locations

Connectors J2 & J3 provide pin-header alternatives to the DB15 and DB37 connectors. The J2 & J3 holes are always present, but are obstructed when the DB15 and DB37 are installed.

J2 & J3 can be seen in the pictures at the top of this page which show the component side of the T7-OEM and T7-Pro-OEM PCBs.  For both the DBs and pin headers, holes with a square solder pad indicate pin number 1, 10, 20, or 30.  For both the DBs and pin headers, pin 1 is at the lower-left.  For the DB connectors the pin numbers increment from 1 left to right across the bottom row, and then continue left to right across the top row.  For the pin headers, the odd pins increment left to right across the bottom row (1, 3, 5, ...) and the even pins increment left to right across the top row (2, 4, 6, ...).  

J2 - 16 position, 2 row, 0.1" pitch, male pin rectangular header

J3 - 40 position, 2 row, 0.1" pitch, male pin rectangular header

Sometimes customers order tall pin headers that mate directly to a separate custom PCB. Refer to the pinout details below for electrical connections.


Table 22-2. J2 Pinouts

1 GND 2 VS
3 CIO0 4 CIO1
5 CIO2 6 CIO3
7 GND 8 EIO0
9 EIO1 10 EIO2
11 EIO3 12 EIO4
13 EIO5 14 EIO6
15 EIO7 16 GND


Table 22-3. J3 Pinouts

1 GND 2 GND 3 PIN20 (10uA)
4 PIN2 (200uA) 5 FIO7 6 FIO6
7 FIO5 8 FIO4 9 FIO3
10 FIO2 11 FIO1 12 FIO0
13 MIO0 14 MIO1 15 MIO2
16 GND 17 Vs 18 Vm-
19 Vm+ 20 GND 21 DAC1
22 DAC0 23 GND 24 AIN13
25 AIN12 26 AIN11 27 AIN10
28 AIN9 29 AIN8 30 AIN7
31 AIN6 32 AIN5 33 AIN4
34 AIN3 35 AIN2 36 AIN1
37 AIN0 38 GND 39 GND
40 GND


J4 - Constant Current Sources

Since the screw terminals are not installed on an OEM T7, the J4 header location can be used to gain access to the constant current sources. Any 6 position 0.1" pitch rectangular header will work.

 Table 22-4. J4 pinouts

1 200μA
3 10μA
6 VS

J8 - Mechanical

The J8 pin header location is purely for mechanical support for that region of the board.  There are no electrical connections to this area.  It is a 2 position 0.1" pitch rectangular header.



For pricing & ordering, go to the main T7 Product Page.

OEM-Friendly Installers

OEM-friendly Software Installers (Windows)

To make deploying OEM LabJacks alongside LabJack software easier, there are two options:


Suppose I provide 5V via J5 and remove R15. Will the USB interface initialize and operate correctly if it's connected after 5V has been applied? How about if it's connected before 5V is applied?

In the "J3 OEM Pin-Header" pins 13 through 15 it lists MIO0/CIO0, MIO1/CIO1, and MIO2/CIO2.  Um, surely these are not wired together?  Is there a jumper to select between the two, or is it in the firmware or the software?  And whatever the answer, what are the steps for changing it, please?


That was a copy/paste error from the U6 User's Guide.  On the U6 those I/O are shared, but on the T7 they are not.  Table above is fixed now.