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Pinouts

Updated on May 12, 2026
Rear panel of the LabSat device showing power, USB, Ethernet, expansion, reference clock, RF input/output connectors, and battery access cover.
Rear View of LabSat 3

Connector 1 - POWER (2-pin Lemo)

2-pin LEMO power connector.
PINI/OFunctionRange
1IPower+8 - 30 V
2IGround0 V

Connector 2-4 - RF OUT, RF IN and REF

SMA Antenna connector.
PINNameFunctionRange
CenterRF INRF Signal InputDC bias for active antennaBias output 2.8 - 3 V
RF OUTRF Signal OutputDC Blocked
REF10 MHz Reference Clock Input
Chassis-Ground

Connector 5 - Expansion port (36 way MDR type)

Rear view pinout diagram of the LabSat expansion connector showing CAN, RS232, I2C, digital I/O, 1PPS, ground, and reserved signal connections.

The 'EXPANSION' connector on the rear of LabSat 3 gives access to a number of signals including CAN Bus, RS232, 1PPS and Digital input/output. Accessory RLACS202 is used to provide user signal access for integration into the users test system.

NumberNameI/OFunction
11PPSOSignal from Internal GNSS monitor. Becomes active when monitor is locked. 5 V Level. 25 mA
2DIGOOUser digital output. 5 V Level. 25 mA max
3DIGIIUser digital input. Up to 12 V input level. Detection threshold=2.5 V
4---
5---
6---
7---
8---
9---
10CAN 1 HI/OCAN Bus High Channel  1 – Standard ISO 11898 voltage signal levels for CAN
11CAN 1 LI/OCAN Bus Low Channel  1 – Standard ISO 11898 voltage signal levels for CAN
12CAN 2 HI/OCAN Bus High Channel  2 – Standard ISO 11898 voltage signal levels for CAN
13CAN 2 LI/OCAN Bus Low Channel  2 – Standard ISO 11898 voltage signal levels for CAN
14I2C SDAI/OI2C Bus Data – Reserved for future use
15I2C SCLI/OI2C Bus Data – Reserved for future use
16I2C VCCI/OI2C Bus Data – Reserved for future use
17RS232 TxORS232 data output. NMEA Data from GNSS monitor or User RS232 data if enabled. Standard RS232 Level
18RS232 RxIUser RS232 data which is recorded if RS232 is enabled in Digital configuration menu. Standard RS232 Level
19GroundOGround Connection
20GroundOGround Connection
21GroundOGround Connection
22---
23---
24---
25---
26---
27---
28IO_0I/OReserved
29IO_1I/OReserved
30IO_2I/OReserved
31IO_3I/OReserved
32---
33GroundOGround Connection
34GroundOGround Connection
35PowerOConnected to input power – Max 250 mA
36PowerOConnected to input power – Max 250 mA

Expansion Connector (RLACS202)

Annotated RLACS202 expansion adaptor showing RS232, CAN, digital I/O, analogue I/O, power, ground, and 1PPS connections.

Locking Expansion Connector (RLACS261)

RLACS261 expansion adaptor showing RS232, CAN1, CAN2, digital I/O, ground, and 1PPS connections with CAN termination resistor switches.

Connector 1 - RS232 (9-PIN SUB-D)

9-pin D-sub connector.
PINI/OFunctionRange
2OTxRS232 data output. NMEA Data from GNSS monitor or User RS232 data if enabled. Standard RS232 Level
3IRxUser RS232 data which is recorded if RS232 is enabled in Digital configuration menu. Standard RS232 Level
5OGround-

Connectors 2 / 3 - CAN 1 / CAN 2 (9 PIN SUB-D)

9-pin D-sub connector.
PINI/OFunctionRange
2I/OCAN LowCAN Bus Low Channel 1/2 – Standard ISO 11898 voltage signal levels for CAN
7I/OCAN HighCAN Bus High Channel 1/2 – Standard ISO 11898 voltage signal levels for CAN