On-Machine Distributed I/O

Catalogs > Automation Systems Catalog > I/O > On-Machine Distributed I/O > 1738 ArmorPoint I/O

1738 ArmorPoint I/O

Power Supplies

ArmorPoint I/O adapters have built-in POINTBus power supplies. All ArmorPoint I/O modules are powered from the POINTBus by either an adapter or expansion power supply.

For power specifications see Communication Adapter Modules

An auxiliary 24V DC power supply provides power to the POINTBus backplane and I/O modules. You can connect up to 17 I/O modules and an adapter with a maximum of 10 A field power, using the auxiliary power.

ArmorPoint Expansion Power Unit

The ArmorPoint I/O Expansion Power Unit (1738–EP24DC) passes 24V DC field power to the I/O modules to the right of it. This unit extends the backplane bus power and creates a new field voltage partition segment for driving field devices for up to 17 I/O modules. The expansion power unit separates field power from I/O modules to the left of the unit, effectively providing functional and logical partitioning for:

• Separating field power between input and output modules
  
• Separating field power to the analog and digital modules
  
• Grouping modules to perform a specific task or function
  

Power to the POINTBus backplane and I/O modules is brought in through the auxiliary power connector. You can connect up to 12 I/O modules and an adapter with a maximum of 10 A field power, using the auxiliary power. Additional I/O modules require the use of one or more ArmorPoint I/O 24V DC expansion power units.

The auxiliary power supports up to 17 I/O modules and an adapter with a maximum of 10 A field power. The 24V DC expansion power unit (1738-EP24DC) extends the backplane bus power to support up to 17 more I/O modules. Connect additional expansion power units to expand the I/O assembly up to the maximum of 63 I/O modules.

ArmorPoint Field Power Distributor

The ArmorPoint I/O Field Power Distributor Module (1738-FPD) passes through all ArmorPoint I/O backplane signals, but does not provide additional POINTBus backplane power. The field power distributor gives you the ability to change the field power distribution source for I/O modules to the right of the field power distributor. This facilitates logical or functional partitioning of low-channel count, high I/O mix applications using any of the communication adapters. Use the field power distributor with a broad range of voltage inputs including 5V DC to 250V DC and/or 24V AC to 240V AC applications and I/O modules.

The ArmorPoint field power distributor (1738-FPD) discontinues the I/O circuit power bus in order to change the field power source for I/O modules to the right of it. This allows a broad range of voltage inputs in the I/O assembly.

Specifications

Cat. No.	Power Input Voltage Range	Field Side Power Requirements	Inrush Current, Max.	PointBus Output Current Rating	Power Consumption, Max.
1738-EP24DC	10…28.8V DC	400 mA at 24V DC (+20% = 28.8V DC)	6 A for 10 ms	1.3 A	9.8 W at 28.8V DC
1738-FPD	5…150V DC 24…240V AC	—	—	—	—