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Wiring Instructions

Pin No. Code Description

1 B RS485 B signal, RS232 TX (to remote device)

2 A RS485 A signal, RS232 RX (from remote device)

3 RTN signal for serial communications

Section 4.4 - Connecting Communications

Table 3 - Connecting Communications

Note: The RTN signal is isolated from the Signal RTN and the Power GND.

Section 4.5 - Connecting Inputs

Connect Input sensors to the terminals Marked Zone 1 though Zone 12 (Z1 – Z12) on

the rear panel. For the DP606A only Zones 1 through 6 are active and Terminals Z7

– Z12 are only used for 3 Wire RTDs. When connecting sensors follow the polarity

indicated on the rear panel. For Thermocouples the Negative wire is Red (NA) or

White (IEC 584-3). For Process Inputs the Negative terminal is ground.

For the RTD 3 wire option the common wires must be connected to the + terminals

of both the upper (Z1 – Z6) and lower (Z7 – Z12) input boards. The negative terminal

of Z7- Z12 remains unconnected. If a 2 wire RTD needs to be used in 3 Wire mode

use a jumper wire to connect the upper and lower terminals together. Refer to the

wiring diagram below.

+ -

+ - + - + - + - + - + -

Z7 Z8 Z9 Z10 Z11 Z12



Figure 5 - 3 Wire RTD Wiring Diagram

Note that all negative input terminals share a common internal ground connection.

Ensure that all sensors share a common ground or are fully isolated.

Omega DP606A User Manual

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