Omega RD8800 User Manual page 147

Setting the Jumpers for the 3 or 6 Channel Mechanical or Solid State Relay
WARNING: Due to hazardous voltages on the Rear Terminal Panel, use extreme caution when installing or
servicing your instrument. Please read the entire contents of the Installation and Wiring Chapter
before attempting to install or service your instrument.
WARNING: Before attempting to remove the unit from the panel, opening the front or working on the back of
the instrument, ensure that the AC mains to the unit is SWITCHED OFF and REMOVE THE
POWER CORD from the socket on the rear panel. Ensure that all live connections to the rear
panel terminals are ISOLATED before removing the wiring.
Set Jumpers
The opto-isolated inputs require an external potential of 5 to 12 Volts DC @ 10mAmps by default. To activate the
inputs via potential free contacts (contact closure), jumpers need to be set as described below:
1. Remove the circuit board from the rear panel (See Figure 1).
Rear Panel
Circuit Board
Figure 1 Jumper Location (Mechanical Relay shown - The jumpers
2. Set the jumpers according to Table 1:
Isolated Input
0-5 Vdc (Default)
Non-Isolated
Contact Closure
3. Screw the circuit board back onto the rear panel.
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Appendix E
3
2
1
for the Solid State Relay are in the same location.)
Mechanical Relay
(2010 Rev 1.0 and higher)
P1
Link
2 - 3
Link
1 - 2
Table 1 Jumper Positions
Page 1 of 2
NOTE:
isolated from the System Ground
P1 and P2 Jumper Location
Solid State Relay
(2011 Rev 1.2 and higher)
P2 P1
Link Link
2 - 3 1 - 2
Link Link
1 - 2 2 - 3
Contact closure is non-
P2
No Link
Link
1 - 2