Receiver pinouts

1

GND

Ground Digital ground

Ground Digital ground

2

RTK LED

RTK LED. Flashes when an RTK correction is present. This is similar to all OEM GNSS products, except for the requirement for an external resistor.

When used to drive an LED, a series resistor with a typical value of 300 Ohms is required. This pin supplies a maximum current of 4 mA. For LEDs with Vf above 2.7 or current excess of 4 mA, an external buffer is required.

3

POWER_OFF

Powers the unit on and off.

Drive high with a 3.3 V to gracefully shut down the unit, leave floating or ground to keep the unit on. Integrators should not drive TTL signals when the unit is not powered.

4

PPS (Pulse Per Second)

Pulse Per Second

This is 3.3 V TTL level, 4 mA max drive capability. To drive 50 load to ground, an external buffer is required.

5

VCC Input DC Card Power

VCC Input DC Card power (3.3 V only)

VCC Input DC Card power (3.3 V only)

6

VCC Input DC Card Power

VCC Input DC Card power (3.3 V only)

VCC Input DC Card power (3.3 V only)

7

Event2, CAN1_Rx and COM3_Rx

Event2 – Event input

CAN1_Rx - CAN Receive line

COM3_Rx – COM3 Receive line – TTL Level

MUTUALLY EXCLUSIVE and TTL level.

Connect Event2 to a TTL level signal to use as Event.

Connect CAN1_Rx to RX line of a CAN driver to use as CAN.

Connect COM3_Rx to a transceiver if RS-232 level is required.

8

Event1

Event1 – Input

Event1 (must be 3.3 V TTL level)

9

Power LED

POWER Indicator. High when unit is on, low when off. This is similar to all OEM GNSS products, except for the requirement for an external resistor. This allows user to use this as a control line.

When used to drive an LED, a series resistor with a typical value of 300 Ohms is required. This pin supplies a maximum current of 4mA. For LEDs with Vf above 2.7 or current excess of 4mA, an external buffer is required.

10

Satellite LED

Satellite LED. Rapid flash indicates <5 satellites. Slow flash indicates >5 satellites.

When used to drive an LED, a series resistor with a typical value of 300 Ohms is required. This pin supplies a maximum current of 4mA. For LEDs with Vf above 2.7 or current excess of 4mA, an external buffer is required.

11

COM2_CTS

COM2 Clear to Send – TTL Level

Connect COM2_CTS to a transceiver if RS-232 level is required.

12

RESET_IN

RESET_IN – ground to reset

Drive low to reset the unit. Otherwise, leave unconnected.

13

COM2_RTS

COM 2 Request to Send – TTL Level

Request to Send for COM 2 connect to a transceiver if RS-232 level is required.

14

COM2_Rx

COM 2 Receive Data – TTL Level

Connect COM2_RX to a transceiver if RS-232 level is required.

15

NO CONNECT

Reserved

16

COM2_Tx

COM 2 Transmit Data – TTL Level

Connect COM2_TX to a transceiver if RS-232 level is required

17

NO CONNECT

Reserved

18

COM1_Rx

COM 1 Receive Data – RS-232 Level

19

CAN1_Tx and COM3_Tx

CAN1_Tx - CAN Transmit line
COM3_Transmit Data – TTL Level

MUTUALLY EXCLUSIVE and TTL level.

Connect CAN1_Tx to TX line of a CAN driver to use as CAN.

Connect COM3_Tx to a transceiver if RS-232 level is required

20

COM1_Tx

COM 1 Transmit Data – RS-232 Level

21

USB D (-)

USB D (-) Bi-directional USB interface data (-)

Device Mode only. If VCC is supplied, USB detects VBUS.

22

USB D (+)

USB D (+) Bi-directional USB interface data (+)

Device Mode only. If VCC is supplied, USB detects VBUS.

23

GND

Ground Digital ground

Ground Digital ground

24

GND

Ground Digital ground

Ground Digital ground

1

ETH_RD-

Ethernet Receive line minus. Differential pair.

Connect to Magnetics RD-.

2

ETH_RD+

Ethernet Receive line plus. Differential pair.

Connect to Magnetics RD+.

3

CENT_RD

RD Magnetic center tap.

Connect to Magnetics RD Center Tap.

4

ETH_TD+

Ethernet Transmit line plus. Differential pair.

Connect to Magnetics TD+.

5

ETH_TD-

Ethernet Transmit line minus. Differential pair.

Connect to Magnetics TD-.

6

CENT_TD

TD Magnetic center tap.

Connect to Magnetics TD Center Tap.