MERRICK Genetix User Manual

Page 75 of 104
Communications
(Main Menu > Advanced Setup > Communications)
Selecting this menu item, you will be presented with a list of all the available serial
communications ports. Each is individually configurable for any of the available
communications protocols. The minimum list of available ports will like this:
GCM Port 0 (USB)… ↑
GCM Port 1
GCM Port 2 ↓
When you select any of the available ports you will be presented with another menu
like this:
Protocol… ↑
Baudrate…
Parity…
Data bits…
Stop Bits…
Exp Comm Bd Routing…
Numeric Data… ↓
Protocol
There are several different serial protocols available for different kinds of
communications tasks. Each is listed below with a brief description of its intended
use. Note, not all protocols are available on all ports.
Note: A complete discussion of these protocols details of how to use them for
communications with the Genetix controllers is beyond the scope of this Manual. If
you require assistance, contact the Merrick Customer Support department or see
www.merrick-inc.com/mct

MERRICK Genetix Specifications

Operating Environment

maximum ambient temperature	50°C (122°F)
minimum ambient temperature	-10°C (14°F)

Power

supply voltage	24 VDC +/- 1V
power consumption	8W nominal, 12W maximum
power dissipation	5W nominal, 10W maximum

Loadcell Inputs

excitation voltage	5 VDC
excitation current	300mA (max)

Tachos

supply voltage	5 VDC
supply current	400mA, maximum (total)

Analog Inputs

input impedance (current input)	200 ohms
input impedance (voltage input)	100Kohms

Digital Inputs

input impedance at 24 VDC	7.5 KΩ
input impedance at 120 VAC	64 KΩ
input impedance at 240 VAC	120 KΩ

Digital Outputs

contact ratings (AC)	5A, 250 VAC
contact ratings (DC)	5A, 30 VDC

External Mechanical Totalizer

contact ratings (AC)	120mA, 240 VAC
contact ratings (DC)	120mA, 24 VDC