BAM 1020-9800 Manual Rev W.docx
Page 78
1.
TELEMETRY FAULT NO VOLTAGE
This input can be used to signal the BAM
1020 that the external telemetry system (data logger) is not operational. This contact-
closure input must be activated for a minimum of 2-seconds. If activated, the BAM will
continue to function and will log a
“U” error (see section 7.2), and will also activate the
INVALID DATA relay output. This input can be set to normally-open or normally-closed
in the SETUP > INTERFACE menu. Rarely used.
2.
EXTERNAL RESET NO VOLTAGE
This input can be used to synchronize the
BAM 1020 clock to the external data logger at the top of the hour, and is often used in
EARLY cycle mode. This is a contact-closure input which must be activated for a
minimum of 2-seconds. The input can be set to normally-open or normally-closed in
the SETUP > INTERFACE menu.
3.
EXTERNAL RESET VOLTAGE
This input is the same as above except the input is
activated by a TTL logic voltage level instead of a contact-closure. Max 15mA @ 15V
or 5mA @ 5V DC. Five-volt logic is typically used for this input.
4.
TAPE FAULT`
This is a contact-closure output which will be activated whenever
a
“T” tape error is generated by the BAM (see section 7.2). Polarity is normally-open.
5.
FLOW FAULT
This is a contact-closure output which will be activated whenever
a
n “F” flow error is generated by the BAM (see section 7.2). Polarity is normally-open.
6.
INVALID DATA
This is a contact-closure output which will be activated whenever
a C, P, N, R, L, I, M, or U error is generated by the BAM (see section 7.2). Polarity is
normally-open.
7.
MAINTENANCE
This is a contact-closure output which will be activated whenever
a maintenance
“M” flag is generated by the BAM (see section 7.2). Polarity is
normally-open.
8.
RELAY 1 NC/NO
This relay output is used in dual-unit coarse configurations only.
The master BAM outputs a clock synch signal to the external reset input of the slave
unit using this output.
9.
PUMP CONTROL
This is the low-voltage output which signals the vacuum pump to
turn on or off. There is no polarity on this output because the pump controller has a
diode bridge input. Connect the two-wire control cable from the pump to these output
terminals.
10.
POWER FAIL
This is a contact-closure output which will be activated (closed)
whenever a power failure or an “L” error occurs in the BAM (see section 7.2).
11.
VOLTAGE OUTPUT
This is the BAM analog concentration output voltage
connection. See section 8.1. Polarity must be observed on this output.
12.
CHASSIS GROUNDS
These are the earth-ground terminals. These should be
attached to a ground rod for best operation of the BAM 1020.
13.
CURRENT OUTPUT
This is used when the analog output is needed in current
loop form instead of voltage. Typically only used if there is a long distance between the
BAM and the data logger. Output is selectable between 4-20mA or 0-16mA.
