Omega Vehicle Security OMP-MODL manual Four Channel Analog Input terminals 1 through

2... OMP-MODL System Base

A terminal strip is provided at one end of the module for the connection of sensor and signal wiring. The terminal strip can be unplugged for mass connect/disconnect of the field wiring. Connections are defined in Figure 2...

-8 and details on each of the functions follow.

+	-	GND	+	-	GND
	A			B
1	2	3	4	5	6

SHIELD

+	-	GND	+	-	GND		CJC		CHGND	+	-
C			D							GPDI
7	8	9	10	11	12	13	14	15	16	17	18

INTERNAL CJC

EXTERNAL CJC

EARTH GROUND

ML007

Figure 2... -8: Terminal Strip connections (MLAD-1 Module, end view)

Four Channel Analog Input (terminals 1 through 12)

The MLAD-1 module provides four channels of analog input signal conditioning identical to that provided by the MLIM-1 Module (Chapter 3). Each of the four channels can be individually programmed for thermocouple, DC Voltage and DC Current inputs. Hardware configuration switches are provided on the MLAD-1 circuit board to configure the input channels for DC current and medium or high level DC voltage inputs.

Refer to the MLIM-1 Module section in Chapter 3 for details on the input configuration switches, wiring connections and applications of these inputs.

Cold Junction Compensation (terminals 13, 14, & 15)

Integral to the MLAD-1 is a cold junction compensation (CJC) sensor. This sensor is a 10 Kohm @25C (Fenwall curve 16) thermistor which is located by terminal strip header on the inside of the MLAD-1. The CJC sensor senses the temperature of the terminal strips (Internal Mode) which in turn, is used in the mV to temperature conversion equation required in thermocouple measurements. Additionally, the CJC sensor can be used within a Program Net to monitor the temperature inside the OMP-MODL enclosure.

2-12 Using the OMP-MODL