7.4. Rear Panel Connector Definitions

Digital I/O

This termial block provides configurable digital inputs and outputs. See Digital I/O for more information.

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Figure 7.2 Digital I/O connector

Pin

Description

1

Input 1

2

I/O ground

3

Input 2

4

I/O ground

5

+5 V

6

I/O ground

7

Output 1

8

I/O ground

9

Output 2

10

I/O ground

11

Measurement ground

12

Earth ground

The mating connector for the digital I/O is a Phoenix 1923432 terminal block.

USB

../_images/usb_a.png

Figure 7.3 USB connector

Pin

Symbol

Description

1

VCC

+5 VDC

2

D-

Data-

3

D+

Data+

4

GND

Ground

USB Type-C™

../_images/usb_c.png

Figure 7.4 USB Type-C™ connector

Ethernet

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Figure 7.5 Ethernet connector

Pin

Symbol

Description

1

TXD+

Transmit data+

2

TXD-

Transmit data-

3

RXD+

Receive data+

4

EPWR+

Power from switch+ (not used)

5

EPWR+

Power from switch+ (not used)

6

RXD-

Receive data-

7

EPWR-

Power from switch- (not used)

8

EPWR-

Power from switch- (not used)

Module Connectors

Lake Shore M81-SSM Synchronous Source Measure System source and measure modules plug into these connectors. Source modules must be plugged into “S” ports and measure modules must be plugged into “M” ports.

Connect only Lake Shore M81-SSM Synchronous Source Measure System modules to these connectors.

Ref In

The reference input allows the M81-SSM to track an external phase reference. See Reference In for more information.

BNC pinout:

Center

Input voltage

Shell

I/O ground

Ref Out

The reference input enables the M81-SSM to provide a phase reference to external equipment. See Reference Out for more information.

BNC pinout:

Center

Output voltage

Shell

I/O ground

Monitor Out

The monitor output is a configurable analog output. See Monitor Out for more information.

BNC pinout:

Center

Output voltage

Shell

I/O ground