Manual

SpecificationsA–2
Publication 17716.5.99 - December 1995
Number of Input Channels 4
Module Location
1771A1B, A2B, A3B, A3B1, A4B (series A and B)
I/O chassis
1771AM1, AM2 I/O chassis with integral power supply,
adapter
Maximum Count V alue 0-9,999,999 (programmable)
BTW Processing Time (worst case) 5.5ms  on a configuration change
Module Scan Time 1.3-5ms (depending on configuration and frequency)
Maximum Input Frequency
100kHz @ flowmeter Input (maximum frequency is 120kHz 
100kHz @ gate input overrange occurs at 100kHz)
Inputs per Channel
2 - flowmeter input  used for all modes
gate input  used in T
otalizer and Nonresettable
Totalizer modes
Input V oltage
50mV200V ac peak  Magnetic Pickup
540V dc (TTL compatible)
Bently 3300 5 & 8 mm  Proximity Pickups
Input Impedance
5KΩ ± 30% resistive
Number of Outputs 4
Maximum Output Of fstate Leakage Current
less than 300 µA @ 40V dc
Maximum Onstate V oltage Drop
0.6Ω x current
Output Control
Any number of outputs are assignable to any of 4 channels.
One turn-on" value and one turn-of f" value per output.
Output V oltage 5 to 40V dc, customer supplied
Output Current
1A per channel sourced out of module
All outputs can be on simultaneously without derating.
Output Switching Time
outputs triggered by T otal: turn ON < 100µs; turn OFF < 100µs
all other turn ON and OFF times < 1ms
Filtering (F0F3 inputs)  jumper selectable highspeed or lowpass filter jumper (filter = below 70Hz)
Debouncing (G0G3 inputs)  software selectable
1s (approximate) between transitions with no minimum pulse
width  T otalizer and Nonresettable T otalizer modes only
+24V dc Source
ripple: ± 5%; noise: 240mV peaktopeak
Backplane Current 1A maximum
Isolation Voltage
500V between input and backplane
1500V between output and backplane
500V between isolated channels
1500V between isolated outputs and gates
Power Dissipation 13W (maximum); 2W (minimum)
Thermal Dissipation 54.2 BTU/hr (maximum); 6.8 BTU/hr (minimum)
Input Conductors Wire Size
Category
Length
Belden 8761
Category 2
1
304.8m (1000ft)
Output Conductors Wire Size
Category
Belden 8761
Category 1
➀
Environmental Operating Temperature
Conditions Storage Temperature
Relative Humidity
0 to 60
o
C (32 to 140
o
F)
-40 to 85
o
C (-40 to 185
o
F)
5 to 95% (without condensation)
Field Wiring Arm 40-terminal (cat. no. 1771-WN)
Wiring Arm Screw Torque 79 inchpounds
Keying (lower backplane connector)
between 2 and 4
between 6 and 8
Agency Certification
(when product or packaging is marked)
marked for all applicable directives
Class 1 Div 2 Hazardous
➁
➀
Use this conductorcategory information for planning conductor routing as described in the systemlevel installation manual.
➁
CSA certification Class I, Division 2, Group A, B, C, D or nonhazardous locations.
General Specifications