ControlLogix AC (74-132V) Diagnostic Output Module
13
Publication 1756-5.7 - September 1999
1756-OA8D Specifications
Number of Outputs
8 (4 points/common)
Module Location
1756 ControlLogix Chassis
Backplane Current
175mA @ 5.1V dc & 250mA @ 24V dc
(Total backplane power 6.89W
Maximum Power Dissipation (Module)
5.3W @ 60
o
C
Thermal Dissipation
18 BTU/hr
Output Voltage Range
74-132V ac, 47-63Hz
Output Current Rating
Per Point
Per Module
1A maximum @ 30°C & 0.5A maximum @ 60°C
(Linear derating)
8A maximum @ 30°C & 4A maximum @ 60°C (Linear derating)
Surge Current per Point
8A for 43ms each, repeatable every 2s @ 30°C
5A for 43ms each, repeatable every 1s @ 60°C
Minimum Load Current
10mA per point
Maximum On-State Voltage Drop
2.5V peak @ 0.5A & 3V peak @ 1A
Maximum Off-State Leakage Current
3mA per point
Output Delay Time
Off to on
On to off
9.3ms @ 60Hz: 11ms @ 50Hz
9.3ms @ 60Hz; 11ms @ 50Hz
Diagnostic Functions
Short Trip
NoLload
Output Verification
Pulse Test
Field Power Loss (Zero Cross)
Time stamp of diagnostics
12A for 500µs minimum
Off state detection only
On state detection only
User selectable maximum width & user selectable maximum time
delay from zero cross
Detects at 25V peak minimum (Firmware phase locked loop)
+/- 1ms
Scheduled Outputs
Synchronization within 16.7s maximum, reference to the
Coordinated System Time
Configurable Fault States per Point
Hold Last State, ON or OFF (OFF is the default)
Configurable States in Program
Mode per Point
Hold Last State, ON or OFF (OFF is the default)
Maximum Inhibit Voltage
Zero crossing 25V peak
Fusing
Electronically fused per point
Isolation Voltage
Group to group
User to system
100% tested at 2546V dc for 1s
(250V ac maximum continuous voltage between groups)
100% tested at 2546V dc for 1s
Module Keying (Backplane)
Software configurable
RTB Screw Torque (NEMA)
7-9 inch-pounds (0.8-1Nm)
RTB Keying
User defined mechanical keying
RTB and Housing
20 Position RTB (1756-TBNH or TBSH)
Environmental Conditions
Operating Temperature
Storage Temperature
Relative Humidity
0 to 60°C (32 to 140°F)
-40 to 85°C (-40 to 185°F)
5 to 95% noncondensing
AB Parts
