Terminal Block Colors - Honeywell ControlEdge 900 platform Hardware Planning And Installation Manual

102

Terminal Block Colors

Both the barrier style and the Euro style are available in two colors
(red and black). Black terminal blocks, which have gold contacts, are
used for low-voltage, low-energy signals such as analog inputs,
contact inputs and low DC voltages. Red terminal blocks, which have
tin contacts, are used for higher voltages such as 120/240 VAC.
Colors of each Terminal Blocks must correlate to that of the mating
header on I/O modules with which they are used; that is:
Black terminal blocks, which have gold contacts, are for use with
n
I/O modules that have black headers and gold pins in the 20-pin
connector; these include: Analog Input, 4-channel Analog Output,
DC Input, DC Output, Contact Input, pulse Output, Frequency
Input, Quadrature Input.
Red terminal blocks, which have white (tin) contacts, are for use
n
with I/O modules that have red headers and white- (tin-) contacts
in the 20-pin connector; these include: AC Input, AC Output and
and Relay Output.
36-pin black Euro terminal blocks, which have gold contacts, are
n
for use with 8-point AO, 16-Point AO, 16-point AI, 32-point DI, and
32-point DO modules.
Terminal blocks must be keyed by the installer to prevent high
n
voltage terminal blocks from being installed on low voltage
modules.
Any of the color-coded labels will fit into the door of any terminal
n
block. Use care to ensure that all hardware components match
each other, and also match the control strategy in the
configuration file.