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Chapter 1 Quick Start
1-3
1.3 Rear Panel
Rear Panel Connections
Sensor 1 & 2 Connection to quartz crystal sensor remote oscillator. See
Section 1.4 for detailed hookup.
RS-232 Connection to computer serial port for programming and data
acquisition.
Relay I/O Connects 4 relays and 4 digital inputs to external equipment for
process control. See Appendix C for connections.
Option A Card Provides an additional four sensor measurement channels.
Option B Card Provides two 0-5V analog outputs for rate and thickness
readings.
Ground Terminal
Measurement ground terminal.
Voltage Selector WARNING: Select 115V for 90-120VAC, 230V for 180-240VAC.
Line Fuse WARNING: Replace line fuse only with a fuse of the specified
type and rating.
Power Connector WARNING: Use removable power cords only of the specified
type and rating.
Fuse 1/2 A SB at 120VAC
Fuse 1/4 A SB at 240VAC
Line Fuse
Manufactured By
Σ
Model No. SQM-160
Ser No. 80901
instruments
Sigma
Sensor 1 Sensor 2
RS-232
Option A Card
Relay I/O
Option B Card
220
110
10
Ground
Rate Thick
3 4 5 6