Card Diagnostics - Led Wiegand Bit Counters; Figure 89 - Location Of System Status Led; Figure 90 - Location Of Wiegand Bit Counter Leds - Keyscan CA250 Series Technical Manual

Card Diagnostics - LED Wiegand Bit Counters

CA and EC control boards have LED Wiegand bit counters – 10s and 1s – to determine card binary bits. You
must be able to observe the control board to do this procedure. To verify the binary bits, present the card or
tag at the reader and count the number of times each LED blinks.
 10s count the 1
st
 1s count the 2 nd binary digit
Example
If the 10s LED blinks 3 times and the 1s LED blinks 6 times, the card has 36 binary bits (36-bit Wiegand
card).
Cut View of
CA8500B
KI-00147E-04-13
Keyscan Inc. – Technical Guide (PC109x - 07.15)

Figure 89 - Location of System Status LED

Cut View
PC109x Control Board
PSC1
READER PWR
+
FAIL
ACU Protective Cover
+
FAIL
ACU PWR
S4
SYSTEM STATUS
binary digit
Figure 90 – Location of Wiegand Bit Counter LEDs
READER 6 READER 5
CARD
BITS
Wiegand
Bit Counter
LEDs
10s 1s
COMMUNICATION STATUS
TD1 RD1 TD2 RD2 TD3 RD3 TD4 RD4
System Status LED
KI-00191E-04-13
READER 4 READER 3 READER 2
Protective ACU Cover
READER 1
S3
S2
S1
131