• Since the External Status Indication Circuit is activated on a loss of power to the Processor, an
On/Off Switch is strongly recommended.
• Figure 8-1: External Alarm Connections Processor Hard-Wired Example and Figure 8-2:
External Alarm Connections Processor Hard-Wired Example are an example of a suitable
circuit, but not necessarily the only circuit acceptable.
A Plug the Power Wire Harness into the Processor’s Power pigtail.
B Run the two-conductor Alarm cable to the location of the Status Indication Circuit.
C Connect the black and red conductors to the Status Indication Circuit as shown in Figure 8-1:
External Alarm Connections Processor Hard-Wired Example or Figure 8-2: External Alarm
Connections Processor Hard-Wired Example.
8.2 Clutch Pressure Interlock
The Clutch Pressure Interlock uses a Pressure Switch which monitors the Ahead and Astern Clutch pressures.
The Pressure Switch must have a Normally Open (N.O.) contact that closes when adequate Clutch pressure
is reached. The primary function of the Interlock is to prevent high engine RPM when the Clutch is not fully
engaged. The Interlock option must be selected with Function Code C0. There are two selectable methods of
operation as described below:
8.2.1 C0 Methods of Operation
8.2.1.1 01 - Installed
When selected, the Interlock will command the Throttle to Idle, if low or a loss of pressure occurs while
cruising. The Interlock is activated when the Pressure Switch’s contact opens for the minimum period
of time selected with Function Code C1.
If adequate Clutch pressure is not reached in the time programmed in Function Code E5, throttle will
be allowed to increase above Idle. The Throttle will remain at this commanded speed for the time
programmed in Function Code C1 and then returned to Idle, unless adequate pressure is reached
during this time.
The Throttle will remain at Idle until the Control Head’s lever is returned to Idle, the Pressure Switch
contact closes and a speed command above Idle is commanded.
8.2.1.2 02 - Throttle Clutch Pressure Interlock
This option is typically selected when the Clutch takes longer than five seconds to reach full pressure.
The Throttle will remain at Idle until there is a closure of the Pressure Switch’s contact. This prevents
speeds above Idle prior to full Clutch engagement.
In the event of a loss of Clutch pressure while cruising, the Throttle will be returned to Idle after the
time selected with Function Code C1 has expired. Once a closure of the Switch is sensed, indicating
adequate pressure, the Throttle immediately returns to the commanded signal, without having to return
the Control Head lever to Idle first, as is the case with Value 01.
NOTE: The Clutch Pressure Interlock C0 must be set to be used. Refer to section 5.7.1.1.1: Function Code C0 –
Clutch Pressure Interlock.
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