Magnetek Enrange CAN-6 Technical Information PDF herunterladen (Seite 18)

Enrange MHR Instruction Manual

August 2014

Page 17 of 57

Analog/Digital Inputs (CON1, E1, E2, E3, F1, F2, F3)

These six pins can be configured as either analog or digital inputs. The input source used on

these pins must be able to drive 40K Ohm input impedance.

Analog voltage range is from 0 to 12V. The analog input utilizes a 10bit analog to digital

converter. The digital voltage range is as follows: inputs less that 2V are a digital 0; inputs

greater than 3V are a digital 1; the output remains unchanged for inputs between 2 and 3V.

Assemblies with part numbers in the 178-01790-xxxx range have two 4-20mA analog input pins:

F2 and F3 on CON1. These can only be utilized as analog inputs and cannot be used as digital

inputs. If support for digital inputs is required, then the analog pins that support 0 to 12V should

be used.

CAN1 (CON1 A1, B3) CAN2 (CON1 B1, B2)

There are 2 independent CAN-bus ports on the MHR. Each has a software settable termination

resistor internal to the MHR. The termination resistor should only be enabled if the MHR is the

last device on that end of the CAN-bus and there is no external terminating resistor present.

Current Compensated Outputs, PWM Output, and Digital IO (CON2 A1-H3)

Connector 2 pins A1-H3 can be configured in many different ways. However, they can only be

used to drive the high side of any load.

For any Current Compensated output, the high side of the load should be connected to the IO pin

and the low side of the load should be connected to the return pin (see Figure 08).

For PWM and digital outputs the high side of the load is connected to the IO pin and the low side

can be tied to a chassis ground (see Figure 09) or to the return pin on the MHR to alleviate the

need for an external diode when driving inductive loads (see Figure 08).

Keep in mind that the total current for any single pin is limited to 3 Amps. Therefore, if

both IO1 and IO2 were configured as digital outputs and had their low sides returned to

the MHR return1 pin, the sum of the current on IO1 and IO2 must not exceed 3 Amps. If 3A

is needed on both IO1 and IO2, the low side of the load must be connected to a chassis

ground, where an external diode is needed.

See Con2 table for IO/Return Line pairs.

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