K-TCPinout

K-TC: connector pinouts

Updated

Wire a K-TC correctly the first time: which pins carry CAN and power, how the USB port is laid out and which way round a thermocouple plug goes.

Front panel

Every K-TC has two 9-way D-Sub CAN connectors, one USB Micro-B port and a bank of miniature thermocouple sockets:

  • CAN in: male 9-way D-Sub, with screw-lock nuts.
  • CAN out: female 9-way D-Sub, with screw-lock nuts. It carries the same signals as CAN in, so a second module or a 120 Ω terminator plugs in here.
  • micro-USB: USB 2.0 Micro-B, for K-CAL and K-Log.
  • Thermocouple sockets TC0 upwards: 8, 16 or 32 depending on the model.
K-TC32 front panel: the labels CAN in and CAN out sit above two 9-way D-Sub connectors, the micro-USB port is at the top right, and a REXGEN 2 IMU GNSS is cabled to CAN in
K-TC32 with a REXGEN 2 IMU GNSS connected to CAN in. A module on a REXGEN still needs an external supply.

CAN connectors

Both D-Sub connectors carry CAN and the module supply. Use pin 3 for signal ground and pin 5 for power ground.

K-TC CAN in, 9-way D-sub D-SUB 9 · MALE K-TC CAN in, 9-way D-sub Front view of the male connector on the module. 1 2 3 4 5 6 7 8 9 1NC 2CAN-L 3CAN signal GND 5Power GND 4NC 6NC 7CAN-H 9Supply +4.5 to +31 V 8NC Power Ground CAN bus pins Linked pins are a differential pair NC: not connected
CAN in: male connector on the module.
K-TC CAN out, 9-way D-sub D-SUB 9 · FEMALE K-TC CAN out, 9-way D-sub Front view of the female connector on the module. 1 2 3 4 5 6 7 8 9 5Power GND 4NC 3CAN signal GND 1NC 2CAN-L 9Supply +4.5 to +31 V 8NC 6NC 7CAN-H Power Ground CAN bus pins Linked pins are a differential pair NC: not connected
CAN out: female connector on the module.
K-TC CAN in and CAN out, 9-way D-Sub
Pin Signal
1 Not connected
2 CAN-L, CAN bus low
3 CAN ground (signal ground)
4 Not connected
5 Power ground, the return for the pin 9 supply
6 Not connected
7 CAN-H, CAN bus high
8 Not connected
9 Supply, 4.5 to 31 V DC

For the link cables, the terminator and the daisy-chain wiring, see K-Series link cables, termination and terminals. For CAN wiring in general, see CAN bus wiring: termination, cable length and grounding.

USB Micro-B port

The USB port has functional galvanic isolation (see the K-TC specification). Use a USB A to Micro-B cable, such as INF4300. For other cables, see Cables and accessories: part number index.

K-TC USB connector, Micro-B USB MICRO-B · FEMALE K-TC USB connector, Micro-B Front view looking into the USB receptacle on the module. 1 2 3 4 5 1VBUS +5 V 2D− 3D+ 5GND 4ID Power Ground Linked pins are a differential pair
K-TC USB Micro-B receptacle
Pin Signal Notes
1 VBUS USB supply, 5 V
2 D− USB data minus, NRZI line coding
3 D+ USB data plus, NRZI line coding
4 ID Mode detect
5 GND Ground

Thermocouple sockets

The thermocouple inputs are miniature flat-pin sockets for standard miniature type K, J and T plugs. The narrow blade is positive and the wide blade is negative. Which blade sits on top differs by model, so match the + and − printed beside each row: the current K-TC32 panel prints − by the top contact and + by the bottom one, while the older manual and the printed card say + on top.

K-TC and K-BOX thermocouple socket, miniature flat pin MINIATURE THERMOCOUPLE · FEMALE K-TC and K-BOX thermocouple socket, miniature flat pin Front view into one socket. Narrow blade positive, wide blade negative; match the + and − printed on the panel. + − +Positive (+), narrow blade −Negative (−), wide blade
K-TC miniature thermocouple socket
Position Signal
Narrow blade Thermocouple positive (+)
Wide blade Thermocouple negative (−)

Thermocouple plug dimensions

The sockets take a male flat-pin miniature thermocouple plug of these dimensions:

Dimension drawing of a male flat-pin miniature thermocouple plug: blades 12.7 mm long on 8 mm centres, 2.4 mm and 3.17 mm wide, body 29.57 mm long and 20.6 mm wide
Dimensions in millimetres, inches in brackets.
Miniature thermocouple plug dimensions
Feature Millimetres Inches
Blade length 12.7 0.5
Blade centres 8 0.31
Narrow blade width 2.4 0.09
Wide blade width 3.17 0.13
Body length 29.57 1.2
Body width 20.6 0.81
Cable clamp 40 AWG wire up to 5.5 mm cable Up to 0.22

Related guides

Next: K-TC: configuring channels and CAN output in K-CAL.

Products in this guide

K-TC

Thermocouple data logger

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