35
1VAL050601-MB Rev C
BINARY INPUTS
There is a removable filter card plugged into the control board. This filter card has five metal jumpers on the
board. When these jumpers are cut, the binary input threshold is raised by 20 Volts. It is recommended that
these jumpers are cut for 125VDC applications. Jumpers are not cut at the factory it is up to each respective
customer to determine if it is needed and perform the work for their application.
Binary input channels work properly with a voltage range of 24 to 264 VAC/DC regardless of which board is
used. All inputs have a low threshold at about 18 VDC and 19 VAC with the exception of the Protection Relay
input, which has a low threshold of about 7 VDC. To avoid false triggering by noise, the inputs must be active
for at least 6 milliseconds. The current draw for most inputs is < 2 milliamperes. The exception is the Remote
Open and Close inputs, which draw up to approximately 20 milliamperes. The input impedance (Z) is 300k
Ω
except for binary inputs 1 and 2 (Remote Open and Close) which are around 14 k
Ω
input Z.
There are seven different input channels. Only six of them are used for the AMVAC breaker (channel 5 is not
used).
ED2 CONTROL BOARDS AVAILABLE
1. Low voltage full optional board (17 – 75 VDC or 20 – 52 VAC).
2. High voltage full optional board (77 – 280 VDC or 85 – 264 VAC).
3. 0.1 farad aluminum electrolytic capacitors.
Refer to Appendix D, Page 40 for connector (KM), pin locations and associated wires.
Close (KM1005, CH 1, Pins 1 and 2)
The Remote Close input is used to close the breaker remotely. The input impedance is approximately 14 k
Ω
.
Open (KM1005, CH 2, Pins 3 and 4)
The Remote Open input is used to trip the breaker remotely. The input impedance is approximately 14 k
Ω
.
When tripping with electro-mechanical relays, an additional resistor will be required to drop the trip flags.
Auxiliary Open / Safe Open (KM1005, CH 3, Pins 5 and 6)
This input can be configured as either an Auxiliary Open function or a Safe Open function. The position of dip
switch I1002 determines which is selected. If it is Off, it is used as Auxiliary. If the dip switch is On, it is used
as Safe Open.
The Auxiliary Open functions the same as the Remote Open function, with the exception of the input imped-
ance which is approximately 300 k
Ω
.
The Safe Open function allows the user to open the circuit breaker when the on-board microcontroller is
faulty. During normal conditions, all opening inputs work, but if the microcontroller is damaged, only the Safe
Open input can perform the opening command. When the microcontroller is damaged, capacitor monitoring is
not active so other inputs will be ignored. In order for the breaker to open correctly, there must be sufficient
energy in the capacitors.
APPENDIX C
E
LECTRONIC
C
ONTROL
B
OARD
Provided
by
Northeast
Power
Systems,
Inc.
(NEPSI)
Summary of Contents for AMVAC
Page 2: ...2 1VAL050601 MB Rev C Provided by Northeast Power Systems Inc NEPSI ...
Page 46: ...46 1VAL050601 MB Rev C APPENDIX F Provided by Northeast Power Systems Inc NEPSI ...
Page 47: ...47 1VAL050601 MB Rev C APPENDIX G Provided by Northeast Power Systems Inc NEPSI ...
Page 49: ...49 1VAL050601 MB Rev C NOTES Provided by Northeast Power Systems Inc NEPSI ...
