3 leds, The ccu-2 has input and output leds – CTI Products CCU-2 Channel Control Unit User Manual
Page 11
CCU-2 Hardware Reference
Switches & Jumpers
CTI Products, Inc.
68-11843-100
11
4.3
LEDs
The CCU-2 has input and output LEDs.
89
7
A
B
C
D
EF
01
23
4
5
6
89
7
A
B
C
D
EF
01
23
4
5
6
89
7
A
B
C
D
EF
01
23
4
5
6
1
2 3 4
ON
PWR
ACT
A
11 12
10
9
8
7
6
5
4
3
2
1
RESET
DC IN
OPTION
MODULE
GROUP
IN
OUT
NETWORK
SVC
ERR
B
1
2 3
4 5
6 7
8 9 10 11 12
4.3.1
Input LEDs
The left-side "A" LEDs are the input LEDs, one for each input.
LED On
Input Active
LED Off
Input Inactive
The input LED mapping is as follows:
LED
Function
A1-A6
ForceA1 – Force A6
A7-A12
ForceB1 – ForceB6
The input LEDs will all blink on upon power-up as a self-test.
4.3.2
Output LEDs
Output LEDs indicate the state of each of the 8 outputs:
LED On
Output A
LED Off
Output B
Since all relays are driven to the same state, the output LEDs should be all on or
all off.
4.3.3
PWR, ERR, ACT LEDs
The CIB has three additional LED indicators on the front panel.
PWR On when sufficient power is present
Blinks when the voltage is low.
ERR 1 Blink:
Group:Module set to FF:F (Invalid address)
2 Blinks:
Improper internal daughter boards detected
Solid On:
Other error (hardware or software)
ACT On:
Connected to a PC running MCNRCD software
Input LEDs
Output LEDs