M SERIES
LOADS
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The M040 contains two identical negative high-voltage driver circuits. Each consists of a 4-input positive NAND gate that controls a PNP transistor switch. The switch is capable of sinking up to 600 rnA of current to ground from an external power supply of up to -70 volts. One terminal of the load device (relay, etc.) must be connected to the external voltage, the other to the drive output. The positive terminal of the external supply connects to the module ground.
APPLICATIONS
The M040 can drive relays, solenoids, stepping motor windings and similar inductive loads.
Restrictions: Not recommended for indicator drive.
FUNCTIONS
ON Condition: Each driver sinks current from the external circuit when all four.
control inputs are HIGH. The amount of current is determined by the external voltage and load impedance. (The internal switch is a saturated PNP transis-tor.) Typical output voltage when sinking 0.6 A is -2 volts.
OFF Condition: When one or more control inputs is LOW, the internal switch is a high impedance and the output voltage approaches the external voltage source. The output circuit draws a small amount of leakage current (typicaHy 100 /LA for a 70-volt external supply).
Anti-Kickback: Pin V2 of the driver module must be connected to the external supply so that the drivers will be protected from the back voltage generated by inductive loads. If the wire to the power supply is more than three feet long, it may have to be bypassed at the module with an electrolytic capacitor to reduce the pulse overshoot caused by the inductance of the wire.
Improving Recovery Time: If pin V2 is connected to the supply through a re-sistor, the recovery time of inductive loads can be decreased at a sacrifice in maximum drive voltage capability. Maximum rated supply voltage less actual supply voltage should be divided by load current to find the maximum safe resistance.-When both circuits on a module are used, the load current for the above calculation is the sum of the currents.
PRECAUTIONS
Grounding: High current loads should be grounded'directly at pin C2 of the M040, rather than at a frame or bus ground.
Parallel Operation: No more than two circuits should be paralleled to drive loads beyond the current capabilities of single circuitS.
SPECIFICATIONS
Current sinking capability: 600 rnA per circuit, max.
External supply voltage: 70 V dc max.
Circuit Delay: Typical propagation delay for each circuit is 5 p'S (between 10% and 90% voltage points) for an external supply voltage of 70 volts.
M050
50 MA_'ND'CATOR DRIVER
Length: Standard in-candescent bulbs such as those on an indicator panel.
. APPLICATIONS
The M050 is used to provide drive current for a remote indicator, such as Drake 11-504, Dialco 39-28-375, or Digital Indicator type 4908, or as a level converter to drive 4917 and 4918 indicator boards.
Restrictions: Do not use to drive inductive loads (relays, solenoids).
Note: For those applications requiring the sinking of current, refer to K Series.
FUNCTIONS
A LOW level on the input of the driver causes current to flow in the output.
SPECIFICATIONS
Each output is able to drive 50 rnA into an external load connected to any voltage between ground and -30 volts.
M060
SOLENOID DRIVER
Length: Standard Height: Single Width: Single
LOGIC
-AMPLIFIERS
M SERIES -.
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Volts
+5
GND TextPower
rcA
(max.)See Text
124
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LOAD
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Pins A2,E1, E2 C2, n, Fl: F2, Sl,S2
OSEE NOTE
The M060 module consists of four identical positive high-cu,rent driver cir-cuits. tact:- circuit contains an inverting gate that controls an :NPN transistor switch. A low level, at any input, will turn on the switch whic~ is capable of driving loads up to 1.2 amps to ground with external power supply voltages of
up to +75 V dc. I
APPLICATIONS I
The M060 module can be used to drive relays, solenoids, and any similar inductive loads requiring current of up to 1.2 amps.
It is not recommended for lamp-driving tasks; for this application, the M050 module should be utilized.
EXTERNAL POWER SUPPLY
An external power supply must be used to power the loads. This supply may be a maximum of 75 V dc. In connecting the power supply, the positive terminal should· be connected to pins Sl and S2, and the nEtgative terminal
to ground. I
One side of the load device must connect to the external rUPPIY and the
other side to the driver output. .
FUNCTIONS ~
ON Condition: Each switch activates the load device when he circuit is a logic Low, O. In this condition, the circuit supplies current whic is determined by the external power supply voltage and the load impedance must not
exceed 1.2 amps. '
OFF Condition: When the input is high, the switch is open~nd a high im-pedance exists. In this condition, there is a small amount of leakage current flow which is typically less than 100 p.A for an external supply voltage of 75 V dc.
CONNECTIONS. and PRECAUTIONS
Note that the emitter and collector on each transistor switch, and the ex-ternal power supply inputs, each have two pin connections. These dual connections are required because of the high current capability of the cir-cuit. In each case, the pins should be tied together as shown by the dotted lines on the diagram. It should also' be mentioned that the emitter connec-tions of each transistor switch must tie to ground, preferably at pin C2 of . the logic block.
SPECIFICATIONS
Current Capability: 1.2 amps per circuit (max) External Supply Voltage: 75 V dc (max) Circuit Delay: 10 p'S (typical)-15 p'S (max)