Information

2680 Series specifications
11
• Universal input module: Connect 20 analog inputs or virtually
any sensor type without external signal conditioning
• 2680A Series interfacing: Ethernet; uses TCP/IP protocol via
RJ45 connector, Cat 5. RS-232 input for calibration.
• External trigger: Activate scanning with real-world events
• Totalizer: Pre-settable starting count up/down counter
• Alarm outputs: Flag out-of-limit conditions to external devices
• Power: Accepts 100 V ac to 240 V ac, or 9 V dc to 45 V dc. Can
operate from both simultaneously for fail-safe power operation
Common mode rejection
2680A-PAI:
2680A-PAI: AC: ≥120 dB (50/60 Hz,
± 0.1 % max 1 kΩ source imbalance)
DC: ≥120 dB
2680A-FAI:
2680A-FAI: AC: ≥100 dB (50/60 Hz,
±0.1 % max 1 kΩ source imbalance)
DC: ≥100 dB
Normal mode rejection
50 dB @ 50/60 Hz, ± 0.1 %
Common mode voltage
maximum
2680A-PAI: 300 V dc or V ac rms
(channels 1,11); 150 V dc or V ac
rms (all other channels)
2680A-FAI: 50 V dc or 30 V ac rms
(all channels)
2680A-DIO
Totalizing input
Pre-settable starting count up/down
counter
DC coupled, non-isolated, max +30 V,
min -4 V
Max count: 4,294,967,295
Minimum signal: 2 V peak
Threshold: 1.4 V
Rate: 0 kHz to 5 kHz (debounce off)
Hysteresis: 500 mV
Input debouncing: None or 1.66 ms
Digital inputs/outputs: 20
Threshold: 1.4 V
Hysteresis: 500 mV
Maximum input: +30 V, min -4 V;
non-isolated
Logical “zero” output:
0.8 V max |out = -1.0 mA (1 LSTTL
load equivalent) 1.8 V max |out =
-20 mA 3.25 V max |out = -50 mA
Logical “one” output:
Output voltage depends on external
load 3.8 V min|out = 0.05 mA
(1 LSTTL load equivalent)
Channel capacity
(2680A or 2686A)
20 to 120 channels per chassis
(6 analog input modules of 20
channels each) One master alarm
(open collector) per chassis
Communications:
10BaseT/100 BaseT, TCP/IP via RJ45
connector, CAT V
Math functions
In addition to its analog and digital
input channels, each system supports
60 computed channels. Calculations
include time and rate, addition,
subtraction, multiplication, division,
log, natural log, exponent, square
root, absolute value, integer function
and average.
Measurement speed
(2680A-PAI)
Slow: 6 readings/second nominal
Medium: 41 (50 Hz), 48 (60 Hz) read-
ings/second nominal
Fast: 143 readings/second nominal
(5 readings/second for V ac nominal,
140 readings/ second on 300 Ω
range, 37 readings/second on 3 MΩ
range)
Measurement speed
(2680A-FAI)
Slow: 45 (50 Hz), 54 (60 Hz) read-
ings/second nominal
Medium: 200 readings/second
nominal
Fast: 1000 readings/second nominal
(5 readings/second for V ac nominal,
370 readings/ second on 300 Ω
range, 44 readings/second on 3 MΩ
range)
Analog to digital converter
2680A-PAI: 18 bit, multi-slope type
2680A-FAI: 16 bit, multi-slope type
Relays
Quantity: 8
Type: Form C; DPST
Current: 1 amp, non-inductive
Operation time: 75 ms
Alarm associations
Each Digital I/O may be randomly
assigned as a digital input, status
output, or alarm output (associated
with any input channel or channels)
Trigger input
Minimum pulse: 5 µs
Minimum latency: 100 ms
Input “High”: 2.0 V min,
7.0 V max
Input “Low”: -0.6 V min, 0.8 V max
non-isolated, contact
closure and TTL compatible
Clock
Accurate to within 1 minute/month
for 0 °C to 50 °C range