Kuper RTMC16 and RTMC48 Wiring Wiring diagrams for the Kuper RTMC16 or RTMC48.

The DB-37 connector on the back of the Kuper RTMC 16 card (aka. 'P2'), or the RTMC48's separtate DB-37 connector off 'J1', contains two signals for each of the 16 channels; steps outputs are along the upper pins, direction outputs are along the lower pins.

Note: pins 20 and 37 are 5VDC supply outputs from the computer. Pins 1, 18 and 19 are configured at the factory to be GND, however they may be configured to supply either 5VDC or GND, depending on the setting of JP5 on the RTMC 16 card. See the Kuper docs for more info.

You must wire the first four channels to the Aerial Projector, Main Projector, Camera and Fader respectively. These channels are reserved by the OPCS software for these purposes. The rest are up to you.

The Kuper outputs drive TTL level open collector outputs, which is best for driving optoisolators at the motor drives, such as those found in Centent motor drives. I think there is a buffer chip (or two) you can change on the RTMC 16 to get normal TTL output levels. Possibly this is also true for the RTMC48. Contact Kuper Controls for more information.

Wiring Comments

• Quothe the Kuper documentation:

  'The voltages on pins 1, 18, 19, 20 and 37 are intended to be used to drive opto-isolated inputs to stepping motor drivers. These voltages are the computer bus supply voltages. Use great care when making external connections. External circuitry using these voltages should be limited to a maximum 400 milliampere current draw.'

• Keep the RTMC16/48 wire bundled separately from any motor drive wires. When wires must cross drive wires, do so at 90 degree angles, to avoid crosstalk.

• Contact Kuper Controls for more information on recommended wiring procedures

Kuper I/O Port Address

The I/O port setting on the card is set with jumpers on the card. This setting must match the 'KuperBase' setting in the "STARTUP.DEFS" file.

This table shows recommended settings for the I/O port for the RTMC-16 jumpers, in 'most likely to work' order:

RTMC16 I/O Port Jumper Settings
A3	A4	A5	A6	A7	A8	A9	Address
on	on	on	on	on	off	off	0300
on	on	off	on	on	off	off	0320
off	on	off	on	on	off	off	0328
on	off	off	on	on	off	off	0330
on	on	on	off	on	off	off	0340
on	on	on	on	off	on	off	0280
on	on	off	on	off	on	off	02a0
off	on	on	on	on	off	off	0308
on	off	on	on	on	off	off	0310
off	off	on	on	on	off	off	0318

The default is 0300, and should not be changed unless this port setting conflicts with some other hardware in your PC.

If you change the jumpers I/O port number, you must match the "KuperBase" setting in the STARTUP.DEFS file.

"Kuper Industrial" Board Jumper Settings for the half-sized "Kuper Industrial" board.

The "Kuper Industrial" board is a half-sized version of the RTMC48 for 16 axes of control. For OPCS, use the RTMC48 drivers with this board.

Interrupts / IRQs

OPCS only operates the Kuper boards on interrupt IRQ5, so the boards must have the IRQ setting configured for IRQ5. The Kuper base address should be 0300, but can be changed if need be; just be sure to update the "KuperBase" address setting in the STARTUP.DEFS file.

Sometimes BIOS settings will have IRQ5 assigned to other devices.. disable the IRQ for those devices or assign them some other number that doesn't conflict with the card, or the motors will act erratically.

If their IRQs can't be assigned, then at worst, disable those devices in the BIOS, and if they're needed, replace them with off-the-shelf cards where the IRQ can be set with a jumper.

---

© Copyright 1997, Greg Ercolano. All rights reserved. To report documentation errors, send email to