PI-B357-001 Rev B
B357-001 I24 VDC Input Module (True High)
DATA SHEET
r The Gould B357-001, 24 VDC Input Module senses and converts 24 VDC switched input
signals into logic voltage levels used by the Micro 84’” Controller.
FEATURES
Eight independent 24 VDC inputs
Circuit isolation of 1500 VAC
Field side status indicators
Transient protection
Surge withstand capability in com-
pliance with IEEE 472-1974 and ANSI
C37.90A
Optional Fanning Strip permits module
removal without disturbing field wiring
UL listed
Designed for harsh plant floor
environments
J GENERAL DESCRIPTION
The Gould B357-001, 24 VDC Input Module
senses and converts switched input signals
into logic voltage levels used by the Micro
84 Controller. The logic format for the
module is “true high”. Inputs can be receiv-
ed from push buttons, limit and proximity
switches, termperature and pressure
switches, as well as other 24 VDC sources.
Eight independent threshold switches
sense inputs from an external power
source.
Each input is electrically isolated by an op-
tical coupler. An LED indicator connected
to the circuit’s field side displays the true
ON/OFF state of the input. Both the IEEE
and ANSI standards for surge withstand
capability (SWC) tests are fully satisfied.
This enables the module and controller to
withstand severe voltage transients
prevalent in industrial environments.
The module is housed in a light weight,
durable LEXAN case. A structural
“chimney” within the module provides flow-
through convection cooling and protection
from moisture build-up. Self-contained
mounting brackets eliminate the need for
special l/O housings. A termination connec-
tor is shipped with the Micro 84 mainframe
to be used when the module is attached to
the extreme right bus location.
User connections are made to a standard
screw terminal strip. This strip is compati-
ble with an optional Fanning Strip (P/N
0212-012) which allows quick module
replacement without disturbing field wiring.
Data bus connections are made with stan-
dard interface connectors. These connec-
tors allow the B357 Input Module to be
placed in any location in the I/O structure
without interfering with other module
operation.
=!i!i
GOULD
Electronics
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