Fluke 2680A User Manual page 201

Master Alarm Output Specification
The following specifications cover the Master Alarm output. The Master Alarm
output is located on the rear panel connector, terminals Master Alarm, and Signal
GND.
Specification
Output Voltage - TTL Logical Zero
Output Voltage - TTL Logical One
Output Voltage - Non-TTL Load Zero
Communication I/O
Communication with 2680 Series instruments can be accomplished through either
a 10/100BaseT interface or through an RS-232 port. The 10/100BaseT provides
the primary communication interface. The RS-232 is used for calibration and
limited debug capability.
2686A PC Card Storage
The 2686A supports a non-volatile PC Card (PCMCIA ATA type card) memory
module option. This table provides a list of active channels and the number of
scans to memory card capacity.
Table A-6. 2686A - Active Channels and Number of Scans to Card Capacity
Memory Card/
Active Channels
16 MB
128 MB
256 MB
512 MB
1 GB
Estimating space: 80 bytes/scan + 4 bytes/channel scanned (allow 4.5% overhead for card
formatting)
Table A-5. Master Alarm Output Specification
0.8 V maximum for an Iout of -1.0 mA (1 LSTTL
load)
3.8 V minimum for an Iout of 0.05 mA (1 LSTTL
load)
1.8 V maximum for an Iout of -20 mA
3.25 V maximum an Iout of -50 mA
20 ch 40 ch
100,548 66,765
800,000 528,000
1.6 M 1.056 M
3.2 M 2.112 M
6.2 M 4.224 M
Characteristic
60 ch 80 ch
50,074 40,059
400,000 320,000
800,000 640,000
1.6 M 1.28 M
3.2 M 2.56 M
Appendices
Specifications
100 ch 120 ch
33,382 28,613
264,000 224,000
528,000 448,000
1.056 M 896,000
2.112 M 1.792 M
A
A-5