The PDA1004 relays module includes 4 Form A (SPST) relays rated at 3 Amps and when added to a meter that has four on-board relays results in a system with eight relays.

The PDA1011 dual 4-20 mA output module can only be used with the dual input meters, Modbus scanners, and the high voltage and current meters. Power for these outputs can be provided by the two internal,

isolated supplies on the module itself. Connecting one of these modules to one of these meters that has the on-board 4-20 mA output, results in a meter with three 4-20 mA outputs.

The PDA1044 digital I/O module has four digital inputs and four digital outputs per module and two may be

connected together to achieve a system with eight I/O. External digital inputs function similarly to the F4 digital input. They can be configured to trigger events

(i.e. acknowledge/reset alarms, reset total, reset max and/or min values, disable/enable all relays, etc.), provide specific menu access, or mimic front keys.

Digital outputs can be used to drive solid state relays, or as inputs to other alarm or control devices.

These expansion modules can be used individually or in systems with other modules and serial adapters. For instance, a system consisting of two 4-20 mA inputs, three 4-20 mA outputs, eight relays, eight digital inputs, eight digital outputs and RS-485 could be configured using these items:

(1) PD6060-6R7 Dual Input Process Meter

(1) PDA1004 Relays Module

(1) PDA1011 Dual 4-20 mA Out Module

(2) PDA1044 Digital I/O Module

(1) PDA1485 Serial Adapter

MeterView Pro software can be used to configure these modules when they are connected to meters.