GAI-Tronics 12598-001 Redundant 12 V DC Module - Manual (Page 3)

Pub. 42004-400A
Model 12598-001 Redundant 12V DC Module Page: 3 of 5
f:\standard ioms - current release\42004 instr. manuals\42004-400a.doc
07/07
Operation
After successful installation and testing, the Model 12598-001 Module requires no operator intervention.
Functional Operation
The Model 12598-001 Redundant 12 V DC Module operates with two 12 V dc power supplies. When 12
V dc power is applied to the PS1
IN and PS2 IN terminals of the module, relays K1 and K2 become
active. Output voltage at the DC OUT terminals will be approximately 11.4 V to 11.1 V dc, which is due
to a voltage drop of approx. 0.6 V to 0.9 V depending on the load current through CR1 and CR2. Thus,
as load current increases through the diodes, the voltage drop across each diode increases toward the
maximum value of 0.9 V.
Also, since CR1 or CR2 have a slightly different voltage drops (or turn-on thresholds), either of the
connected power supplies (at PS1
IN or PS2 IN) may initially supply power to load.
Maintenance
The Model 12598-001 Redundant 12 V DC Module does not contain any user serviceable parts. Do not
attempt to make any repairs to the module.
If the module requires service, contact your Regional Service Center for a return authorization number
(RA#). The module should be shipped prepaid to GAI-Tronics with a return authorization number and a
purchase order number. If the module is under warranty, repairs or a replacement will be made in
accordance with GAI-Tronics’ warranty policy. Please include a written explanation of all defects to
assist our technicians in their troubleshooting efforts.
Call 800-492-1212 inside the USA or 610-777-1374 outside the USA for help identifying the Regional
Service Center closest to you.