CTI Products GPIO General Purpose I/O Interface - Manual (Page 15)

GPIO Hardware Reference Option Switches & Jumpers
CTI Products, Inc.
5.2.1 Initializing the Relays
Magnetically-Latched relays in the GPIO will retain their state when power is off.
The initial state of relays after power-up 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.
To initialize the relays to the ON state:
1. Set switches as follows:
3 Up 4 Up.
2. Press the Reset Switch down and wait for 2 seconds.
3. The magnetically-latched relays should go into the ON State.
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 magnetically-latched relays should STAY in the ON State.
All the output LEDs should be ON.
To initialize the relays to the OFF state:
1. Set switches as follows:
3 Down 4 Up.
2. Press the Reset Switch down and wait for 2 seconds.
3. The magnetically-latched relays should go into the OFF State.
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 magnetically-latched relays should STAY in the OFF State.
All the output LEDs should be OFF.
This procedure assumes that you want the magnetically-latched relays to maintain
the last state on power-up. If you want the magnetically-latched relays to always
start up in the ON State or OFF State, use the appropriate switch settings from
Table 6 in steps 4 above.
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