Wiring; Terminal Blocks; Idc Connectors; Protective Earth Connection - Ametek DMS-3K Installation & Operation Manual

Wiring

Terminal Blocks

The I/O and Power Supply Regulators use a removable front plate with terminal block for connection
to power supplies, field contact voltage, inputs, and outputs. The front plate is fastened with screws to
prevent accidental removal. Connection is by screw type terminals (1.5mm², 16 AWG max.)

IDC Connectors

IDC Connectors are used for some output modules. The IDC Connector is a 34 position (2 rows of
17) and is typically used with 34 conductor ribbon cables.

Protective Earth Connection

A Protective Earth Terminal is located on the side of the Logic Card Rack and must be connected to
earth ground. For proper EMC protection, this connection should be made using a minimum ¼"
braided conductor or 12 AWG copper wire. An optional Earth connection is supplied on the front 19"
mounting angle should access to the side connection be prohibitive.

Power Input and Field Contact Voltage

The DMS 3K will accept a 24VDC or 48VDC Power Input directly to the Power Supply Regulator
located in the right position of the Card Rack. External Power Supplies are used for other voltages,
such as 120/240VAC and 125 VDC. The Regulator is used for distributing voltage to the field contacts
and power to the digital outputs installed in the system. In addition, it has a built in 'Horn' Relay which,
when connected to a Digital Output, can be used to drive an external High Power Audible device.
The regulators used for 6U Card Racks have extra current capacity for driving more digital outputs
and more terminals available for distributing field contact voltage.
The following chart shows the different combinations of Power, FCV (Field Contact Voltage) and
Power Supplies.
Power Field Contact
Input Voltage (FCV)
24 VDC 24 VDC
24 VDC 24 VDC
24 VDC 48 VDC
24 VDC 125 VDC
48 VDC 48 VDC
48 VDC 24 VDC
48 VDC 48 VDC
48 VDC 125 VDC
Internal Field Contact Voltage refers to voltage provided by the DMS, External refers to
voltages provided remotely to the unit.
22
Internal or Power Supply Regulator
External FCV
Internal Reg 90 (3U), Reg 92 (6U)
External Reg 91 (3U), Reg 93 (6U)
External Reg 91 (3U), Reg 93 (6U)
External Reg 91 (3U), Reg 93 (6U)
Internal Reg 96 (3U), Reg 94 (6U)
External Reg 97 (3U), Reg 95 (6U)
External Reg 97 (3U), Reg 95 (6U)
External Reg 97 (3U), Reg 95 (6U)