Table 2: Holding Registers When Common ID is Active

Modbus Register Address

Description

Holding Register Registration

Comments

7940

Modbus Device ID of Active Device

—

—

7941

Device Output Latch Register

0 = None triggered

1 = Primary triggered

2 = Secondary triggered

3 = Both triggered

Values in this register latch until acknowledged and

cleared by the master

7942

Device Output Status

0 = None triggered

1 = Primary triggered

2 = Secondary triggered

3 = Both triggered

Values in this register reflect the real time status of the

device's outputs

Wiring Diagrams

Male

Female

Pin

Wire Color

1

4

5

3

2

2

3

4

1

1

Brown

2

White

3

Blue

4

Black

5

Gray

Female (Serial In)

Male (Serial Out)

Signal Description

Pin 1

12 V DC to 30 V DC

Pin 2

RS-485 (+)

Pin 3

DC common

Pin 4

RS-485 (–)

Pin 5

Shield

Female (Discrete Input)

Signal Description

Pin 1

12 V DC to 30 V DC

Pin 2

IO Channel 2

Pin 3

Ground

Pin 4

IO Channel 1

Pin 5

Shield

Status Indicators

Power LED Indicator (Green)

• Solid Green = Power On

• Off = Power Off

PICK-IQ Communication LED Indicator (Amber)

• Flashing Amber = PICK-IQ communications are active

• Off = PICK-IQ communications are not present

Specifications

Supply Voltage

12 V DC to 30 V DC at 50 mA maximum

Supply Protection Circuitry

Protected against reverse polarity and transient voltages

Leakage Current Immunity

400 µA

Operating Conditions

Temperature: –40 °C to +50 °C (–40 °F to +122 °F)

90% at +70 °C maximum relative humidity (non-condensing)

Storage Temperature: –40 °C to +80 °C (–40 °F to +176 °F)

R45C Discrete to Serial Converter

2

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P/N 222571 Rev. A