Teledyne powerpod 400 instruction manual Power Selection

POWER SELECTION

Power input is switchable between 100 VAC, 115 VAC and 230VAC (50 or 60 Hz) via the rear panel. For the safety of the operator as well as the device, the correct power

level should be selected prior to connecting to the power mains. See the table “POWERPOD-400 Specifications” in section 3.0 for the proper fusing when changing power settings.

RATIO CONTROL

Ratio control is possible between channels using a familiar master/slave configuration. Channel one

(1)must be enabled as the master channel. Any combination of the remaining channels is possible for slave channel assignment.

TOTALIZER

A Totalizer function is present for each channel with the capability of counting down from a set point, counting up to a set point or continuous count up. The maximum count is ±999999 units. When the set points are reached, a memory flag for each set point is set to a digital ‘1’ indicating a Boolean ‘true’ value. The Totalizer set point flags must be polled via digital communication to be read. Each flow channel has one low-limit and one high-limit set point available. These alarms are available via open-collector, opto-isolated outputs on the rear panel as well as serial communication.

POWER OUTAGES AND THE OVERRIDE CONDITION

In the event of a power outage, even one of short duration, the POWERPOD-400is designed to conduct a software reset. During the period of time in which the reset is occurring, it will not accept or respond to any commands either manually or digitally until the reset process is completed. After said reset, the POWERPOD-400will have remembered all previously entered set-points but all channels are designed to come up in the “Override-CLOSEd” condition. For meters, this should have no affect on their

behavior. All analog-only, THI, flow controllers with normally-closed (NC) valves will

close and remain closed until operator intervention manually returns selected channels’ Override condition back to the AUTO mode.

For all other controllers, this means that the control signal (pins 5 to 14) of J1 through J4 will return to the previously set level. For controllers not taking advantage of the Override function (pin 8), these controllers will return to their normal, preset operating condition unless other intermediary steps are undertaken. Controllers that are making use of the override function (Pin 8) and have normally-open valves will be driven to the fully open condition.

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