CTI Products CCU-2 Channel Control Unit - Manual (Page 13)

CCU-2 Hardware Reference Switches & Jumpers
CTI Products, Inc.
68-11843-100 13
5.3 Initializing the Relays
The relays in the CCU-2 are magnetically latched and will retain their state when
power is off. The normal state will be all On or all Off.
If the relays come up in a random pattern when the power is initially applied, it is
probably because the relays were jarred during transport or installation.
There are two ways to initialize the relays:
1. Use the normal Force A or Force B inputs to set the latch to state A or B.
This is easiest way to initialize the relays if you have the CCU connected
to the system.
2. Use the front panel switches to initialize the relays.
You can use this method if you don't yet have the CCU-2 connected in the
system.
5.3.1 Initializing the Relays with the Front Panel Switches
To initialize the relays to state A:
1. Set switches as follows:
3 Up 4 Up.
2. Press the Reset Switch down and wait for 2 seconds.
3. The CCU-2 (and all the relays) should go into State A.
All the output LEDs should be On.
4. Set switches as follows:
3 Down 4 Down
5. Press the Reset Switch down and wait for 2 seconds.
6. The CCU-2 (and all the relays) should STAY in State A.
All the output LEDs should be On.
To initialize the relays to state B:
1. Set switches as follows:
3 Down 4 Up.
2. Press the Reset Switch down and wait for 2 seconds.
3. The CCU-2 (and all the relays) should go into State B.
All the output LEDs should be Off.
4. Set switches as follows:
3 Down 4 Down
5. Press the Reset Switch down and wait for 2 seconds.
6. The CCU-2 (and all the relays) should STAY in State B.
All the output LEDs should be Off.
Both procedures assume that you want the CCU-2 to maintain the last state on
power up. If you want the CCU-2 to always start up in State A or State B, use the
appropriate switch settings from table Table 4 in steps 4 above.