weight, durable, drip-proof lexan case. It
the B370’s front panel. This indicator is a
contains mounting brackets which simplify
troubleshooting aid. It turns on whenever
installation. It can be mounted anywhere in
the internal diagnostic tests detect a fail-
the l/O structure. Connectors located on
ure. These tests continuously exercise ran-
the left- and right-rear sides of the case
dom access memory (RAM), read only
plug into similar connectors on adjacent
memory (ROM), and communications
modules.
circuitry.
This plugging action automatically con-
nects the 8370 to the data bus of the Micro
84 Controller. If the B370 is the right-most
module in the l/O structure, plug a ter-
mination connector into the connector
located on the right-rear side. This termi-
nation connector is shipped with the Micro
84 Controller.
The B370 does not require a separate
power supply. It receives power from the
Micro 84.
The RAM and ROM tests are performed
when the 8370 is first powered up and are
performed continuously during operation.
Every data and strobe transfer to the field
wiring is verified by diagnostic tests for in-
tegrity. Potential errors are immediately
corrected. For safety, three consecutive
diagnostic errors will automatically shut
down system scanning (approx. 15 ms.).
Field wiring is also easy to install. (See the
“Terminal Numbering and Output Connec-
tions” diagram for wiring your B370 to field
devices.) You can use shielded or un-
shielded wires having a size of 14 to 22
AWG. Just terminate the wires to a remov-
able, 15screw terminal male plug, which is
mounted on the front of the B370. This plug
is easily removed, which allows you to
quickly replace the B370 without disturbing
field wiring.
In addition to the FAULT indicator, the
B370 is protected against both over vol-
tages and high current. The B370 is able to
withstand the accidental application of 0 to
+24 VDC on any data or strobe output.
Each output has current limited, short cir-
cuit protection.
Besides the connector with its removable
plug, a FAULT indicator is also located on
The B370-001 BCD Register Output Module
meets the stringent requirements of both
IEEE and ANSI standards for radiated surge
withstand capability (SWC). The module
also withstands the severe voltage tran-
sients, electromagnetic interference, and
magnetic fields commonly encountered in
an industrial environment.
SPECIFICATIONS
Electrical
Characteristics
Output Levels
Short Circuit
Protection
TTL & CMOS compatible
(2 unit loads)
Logic “0“
0.4
VDC @
4 mA sink
Logic “1”
3.3
VDC @
1 mA source
Oto +24VDC
continuous
Current limit
Module isolation
8 mA (typical)
1500 VRMS/2500 VDC for
one minute
Strobe Frequency
Strobe Width
Response Time
Data/Strobe Format
Throughput Rate
Circuit Characteristics
Topology
Register Format
Synchronized to Micro 84
scan
1 ms (typical)
<8 ms (both channels)
0 to 999 counts in BCD
Data
-
true high
Strobe
-
true low
Both channels updated
on each scan
Two, 3-digit channels
Nos. 4010,
4012, 4014,
4016, 4018,
4020, 4022,
4024
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