Omega Vehicle Security OM5-C manual OM5-BP-8-MUX-C 8 Position Analog I/O BACKPANEL, Multiplexed

OM5-BP-8-MUX-C 8 POSITION ANALOG I/O BACKPANEL, MULTIPLEXED

DESCRIPTION

The OM5-BP-8-MUX-C backpanel (Figure 15) can accept up to eight OM5 modules in any combination. It can be mounted on the OMX-1363-C 19-inch metal rack. The OM5-BP-8-MUX-C has two analog buses; one for analog input and one for analog output. This two-bus configuration takes advantage of the switch controlled outputs on the input modules and the track-and-hold inputs on the output modules. A temperature sensor is mounted on each channel to provide cold junction compensation for thermocouple input modules (See Figure 16 for schematic). Field connections are terminated with four screw terminals at each module site. Up to eight OM5-BP-8-MUX- C backpanels may be daisy-chained. Use OMX-CAB-01-C cable for daisy chaining and OMX-1315-xx-C cable for connecting to host computer.

Jumpers on the OM5-BP-8-MUX-C permit user selection of low (i.e. channels 0-7) or high (i.e. channels 8-15) addresses.

SPECIFICATIONS

Operating Temperature:	–40°C to +85°C
	95% relative humidity, non-condensing
Interface Connector:
Field	High Density Screw Clamp, 14 AWG Max
Logic	26-pin, male header connector
Address Input Logic Levels:
Max Logic “0”	0.8V
Min Logic “1”	2.0V
II Input Current, “0” or “1”		0.1∝A max at 25°C
		1.0∝A max –25°C to +85°C
RD EN\ or WR EN\ Signal Delay
from Connector P1 to Channels 0-7		51ns at 25°C
Standalone (address 0-7)
		64ns at –25°C to +85°C
Expanded (address 8-63)		100ns at 25°C
		126ns at –25°C to +85°C

Tolerance: ±0.020" (±0.50mm)				10.0"
				(254.0mm)
			9.7"
				(246.3mm)
				9.5"
26 Conductor	5.8"			(241.3mm)
Male Pin Connector P1(1)		(147.3mm)

	(32.4mm)
0.15"	1.275"

(3.8mm)

Swaged

Standoff

Thru Hole

0.15" (3.8mm) Dia.

(6)

0.75"

(19.1mm)

2.25"

(57.2mm)

3.15"

(80.2mm)

	P1	P2 P3		J7
		1	6
				J8
(88.1mm)	(77.5mm)
				J6
				L
				H
				J5
3.47"	3.05"			L
		J1 J2 J3 J4
				H
Pin 2				+5VDC Supply	Sockets for Current
Pin 1	Read Address
					Conversion Resistors, OMX-1362-C

Selection Jumper Write Address

Selection Jumper NOTES: (1) Connector is Berg 65863-075 or equivalent. Mating connector is AMP 49958-6 or equivalent.

10.32X 0.40

Ground Lug, Including Nut and Lockwasher

OMX-CJC-C

Cold Junction

Compensation Circuit

Barrier Strips for

Field Analog Signal I/O Termination. (8)

FIGURE 15. OM5-BP-8-MUX-C Analog I/O Backpanel.

ELECTRICAL

ADDRESS SELECTION

Module read and write addresses may be selected as low (channels 0-7) or high (channels 8-15) using the four sets of 3 position jumpers labeled J5 through J8. Place a jumper over the two pins furthest from the field I/O termination blocks on all four sets to select a low address (factory configu- ration) or over the two pins closest to the field I/O termination blocks on all four sets to select a high address.

The OM5-BP-8-MUX-C backpanel has address decoding circuitry to allow multiplexing any combination of up to 8 input or output modules. Capability is also provided in the address decode circuitry to expand the system to 64 channels (eight OM5-BP-8-MUX-C backpanels) of multiplexed input or output. Jumpers select which set of 16 addresses are assigned to a particular

backpanel. The Read Address group assigns a set of 16 addresses for input modules, and the Write Address group assigns a set of 16 addresses for output modules. The table below shows the correlation of jumper position to address range.

Address Selection Jumpers

Read Address	Write Address	Address
Jumper (P2)	Jumper(P3)	Range
1	6	0-15 Stand alone
2	7	48-63 Expanded
3	8	32-47 Expanded
4	9	16-31 Expanded
5	10	0-15 Expanded

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