Operator`s manual

Signametrics 8
2.0 Specifications and Feature Table
Function SM4020
Standard
Scanner
SM4022
Instrumentation
Scanner
SM4040
Standard
Scanner
SM4042
Instrumentation
Scanner
Number of differential channels 20 40 20 40
Number of 10:1 groups two four two four
Scanning Arrangement Two groups of 10:1 differential Four groups of 10:1 differential
Thermal EMF offset ( µV) 25 1.5 25 1.5
Maximum Switching DC Voltage (V) 110 220 110 220
Maximum Switching AC Voltage (V) 110 250 110 250
Maximum Switching Current (A) 1 1 1 1
Maximum Switching Current (A) 1 1 1 1
Typical inter-channel Capacitance 15pf 15pf 15pf 15pf
Insulation between open contacts ( MΩ,)
>100 >1,000 >100 >1,000
Insulation; contacts to coils (MΩ)
>100 >1,000 >100 >1,000
Insulation; adjacent channels (MΩ)
>100 >1,000 >100 >1,000
No Load Life 2X10
7
10
8
2X10
7
10
8
Loaded Life @ 50Vdc, 0.1A 3X10
5
10
6
3X10
5
10
6
Trigger input
√ √ √ √
Trigger output
√ √ √ √
Thermocouple Cold Junction Capable
√ √
Typical Closure Time (ms) 12 4 12 4
Typical Release Time (ms) 5 2 5 2
Actuation Time (ms) [1] 15 5 15 5
Actuation Time Settable Range (ms) 1 to 850 in 0.25 steps
AutoScan Period Range (ms) 1 to 850 in 0.25 steps
Available Configurations 2-wire, 4-wire,
universal, two-
groups
2-wire, 4-wire, 6-
wire, universal,
two-groups, four-
groups
2-wire, 4-wire,
universal, two-
groups
2-wire, 4-wire, 6-
wire, universal,
two-groups, four-
groups
Available Scan Groups A and B A, B, C and D A and B A, B, C and D
Isolated Relay Coil Drive
√ √
Maximum number of relays closed All All All 40
High Ohms range 1,000 Meg
√
[1] Actuation time is the time it takes to open any closed relays, and close the selected relay.
Table 2-1. Specifications and Feature table.
2.1 Trigger Input
Input Characteristics
• Input LED (nominal 1.7V drop at 1mA) with a series 1kΩ resistor.
• Input Signal requirements >2.5 V, < 10 V to activate. < 1V to deactivate.
• Isolation Optically Isolated from all other circuitry. Common line with Trigger Output.