Delta Tau PMAC2A-PC/104 Manual descargar pdf (Pagina 23)

PMAC2A-PC104 Hardware Manual

Machine Connections 17

• Not opto-isolated; easily connected to Opto-22 (PB16) or similar modules through ACC-21F cable

Jumper E7 on the ACC-1P board controls the configuration of the eight inputs. If it connects pins 1 and 2

(the default setting), the inputs are biased to +5V for the "OFF" state, and they must be pulled low for the

"ON" state. If E7 connects pins 2 and 3, the inputs are biased to ground for the "OFF" state, and must be

pulled high for the "ON" state. In either case, a high voltage is interpreted as a '0' by the PMAC software,

and a low voltage is interpreted as a '1'.

PMAC is shipped standard with a ULN2803A sinking (open-collector) output IC for the eight outputs.

These outputs can sink up to 100 mA and have an internal 3.3 kΩ pull-up resistor to go high (RP18). Do

not connect these outputs directly to the supply voltage, or damage to the PMAC will result from

excessive current draw. The user can provide a high-side voltage (+5 to +24V) into Pin 33 of the J7

connector, and allow this to pull up the outputs by connecting pins 1 and 2 of Jumper E1. Jumper E2

must also connect pins 1 and 2 for a ULN2803A sinking output.

It is possible for these outputs to be sourcing drivers by substituting a UDN2981A IC for the ULN2803A.

This U7 IC is socketed, and so may easily be replaced. Usually the U7 IC is offset by two pins on its

socket, and so pins 1 and 2 usually remain open.

WARNING

Having Jumpers E1 and E2 set wrong can damage the IC. The +V output on this

connector has a 2 A fuse, F1, for excessive current protection.

For this driver, the internal resistor packs pull-down instead. With a UDN2981A driver IC, Jumper E1

must connect pins 2 and 3, and Jumper E2 must connect pins 2 and 3.

Example: Standard configuration using the ULN2803A sinking (open-collector) output IC

Further software settings are required to configure this port. See the Software Setup section for details on

this.

ACC-2P General-Purpose Digital Inputs and Outputs (JOPT Port)

ACC-2P JOPT connector provides sixteen lines of general-purpose I/O. In contrast with the ACC-1P J7

connector, the lines on the ACC-2P JOPT connector are limited to TTL levels and are usually used with

external I/O modules. Each I/O line has its own corresponding ground pin in the opposite row. The 34-

pin connector was designed for easy interface to OPTO-22 or equivalent optically isolated I/O modules.

Delta Tau's Accessory 21F is a six-foot cable for this purpose.

Jumpers E9 and E10 on the ACC-2P board select the I/O lines direction of the JOPT connector. This

allows configuring this port as all inputs, all outputs or half inputs and half outputs. Further software

settings are required to configure this port. See the Software Setup section for details on this.

Input switch

MI1

M01

- +

Load (100 mA max)

GND

+ -

Optional 5 to 24Vdc

ower supply

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Delta Tau PMAC2A-PC/104 Manual Pagina 23