Emerson DL8000, Инструкция по эксплуатации

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DL8000 Preset Instruction Manual
Revised February-2016 Modules 3-9
On the AI-16 module, you use jumper J3 to configure the AI (+T) as 12
or 24 Volts dc. Additionally, two DIP switches provide scaling control
(see Figure 3-6 ).
Figure 3-6. AI-16 DIP Switches
Caution
You can induce ground loops by tying commons from various modules
together.
3.2.6 Analog Output (AO) Modules
The 16-bit Analog Output (AO) module has four channels that provide a
current output for powering analog devices. Analog outputs are analog
signals the DL8000 controller generates to regulate equipment, such as
control valves or any device requiring analog control.
Each channel on this module provides a 4 to 20 mA current signal for
controlling analog current loop devices. The AO module isolation
includes the power supply connections.
Note
:
AO modules (Part Number W38199) with front labels that read
AO-16 are an earlier version that controls the low side current.
AO modules (Part Number W38269) with front labels that read
AO
are the newer version (January 2005 and later) and control
the high side current.
You can configure the AO module as 12 or 24 Volts dc via jumper J4 on
the I/O module (see
Figure 3-7
). The AO module can provide isolated
+12 Volts dc or +24 Volts dc field transmitter power on a per module
basis. For example, one module can p12 Volts dc for powering
low power analog transmitters, while another module in the same
DL8000 controller can p24 Volts dc for powering conventional
4 to 20 mA transmitters. See Figure 3-7 .