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Figure 11-2 provides a detailed view of the ACE3600 DO SBO Relay Module front panel.
Figure 11-2 ACE3600 SBO Relay Module – Front Panel
In the 8 DO SBO modules, the relays of the 8 outputs are Single Pole Single Throw (SPST)
normally open (NO) and are referred to as the "Form A" relays (two NO SPST relays per
output).
In the 16 DO SBO modules, the relays of outputs 1 through 5 and 9 through 13 are Single Pole
Single Throw (SPST) normally open (NO) "Form A" relays. The relays of outputs 6 through 8
and 14 through 16 are Single Pole Double Throw (SPDT) "Form C" relays.
In some applications, it is necessary to inhibit relay output operation when attending the site
for safety reasons. In all DO SBO relay modules, it is possible to inhibit all relays per module.
When a module is configured to enable relay inhibiting (the default in the 8 DO SBO module),
the power to the relays is provided from the power supply via a dedicated power line (12V
DO), controlled from the "12V DO" input (TB located on the power supply module panel).
When the input's terminals are shorted, the relays are operational. When the input's terminals
are open, the relays are inhibited (EE relays in the 0 position), and there is no activating
voltage to the relays, regardless the status of the Operate signal.
By default, in 16 DO SBO modules, relay inhibiting is disabled. By default, in 8 DO
SBO modules, relay inhibiting is enabled.
8 DO SBO Relay
11-3
Digital Output SBO Relay Module
16 DO SBO Relay
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