Option F4M - Isolated Parallel BCD upper board, Three-state with 4-Bit Address

ISOLATED PARALLEL BCD UPPER BOARD, THREE-STATE WITH 4-BIT ADDRESS
OPTION F4M

BCD OUTPUT

Buffered

Isolated

Stored

Three-state

APPLICABLE INSTRUMENTS

Models 203A for DC signals

Models 204B, 2003B and 2004 for DC, AC, true-RMS or process signals

Models 267B and 268 for thermocouple or RTD temperature signals

DEVICE ADDRESSING
4-bit address decoder

The F4M is an upper-board option which provides buffered, isolated, stored, three-state parallel BCD output plus 4-bit addressing for data busing applications. This output is in addition to the non-buffered, non-isolated parallel BCD output, which is a standard feature of the main board of the seven meters which accept the F4M option.

IDEAL FOR INDUSTRIAL ENVIRONMENTS
Buffering the output allows the F4M to drive 12 TTL loads in electrically-noisy environments without affecting correct operation of the host panel meter.
Isolation of all digital I/O lines eliminates ground loops and allows the analog input to the meter to float up to 350 V with respect to BCD ground. Isolated operation requires that an external 5 V dc, 100 mA power supply be used
Storing the BCD data assures that correct BCD data is always available, regardless of the current state of A/D conversion.
Three-state drivers allow all output lines to be put in a logical "0", logical "1", or high-impedance state. The high-impedance state does not load down the external circuit and allows multiple F3A's to be bused with all BCD lines in parallel.

SEPARATE BCD AND METER HOLD
The F4M provides separate BCD and meter HOLD functions. In F4M BCD HOLD, the display and non-isolated BCD output of the main board continue to update while the BCD output of the F4M remains latched. Thus, non-isolated BCD can be used as an uninterrupted input to a Model 872A dual-setpoint controller while the isolated BCD of the F4M is on HOLD.

4-BIT BINARY ADDRESSING
The F4M provides a 4-line address decoder, which allows a BCD bus controller to address any one of 16 meters with all digital lines wired in parallel, including the address lines. This capability allows multiple panel meters to be addressed by one BCD bus controller using mass-termination ribbon cable.

MODEL 320 BCD BUS CONTROLLER
The combination of a Model 820A printer with Model 320 BCD bus controller can be the heart of a low-cost datalogging system with up to 15 Newport panel meters with three-state BCD output and 4-bit addressing. For additional information, please refer to Models 820A and 320.

SPECIFICATIONS

CONTROL-LOGIC INPUTS
Logical "0": 0 to 0.5 V
Logical "1": 2.4 to 5.5 V
Input load: 0.5 TTL unit loads at 5 V

BCD AND CONTROL-LOGIC OUTPUTS
Logical "0": 0 to 0.5 V
Logical "1": 2.4 to 5.25 V
Output drive: 12 TTL unit loads at 5 V

POWER
DC voltage: 5 V dc ±5%
DC current: 100 mA (nominal)
Power consumption: 0.5 W (nominal)
Isolation, power to BCD lines: 350 Vp

ENVIRONMENTAL
Operating temperature: 0 to 50°C
Storage temperature: -40 to +85°C
Relative humidity: 95% at 40°C(non-condensing)

MECHANICAL
Form factor: Newport DIN 1A upper board
Dimensions: 3.35 x 4.69 in (85 x 119 mm)
Connector: 36-pin, double-row, solder-type