Servomex NanoTrace DF-760E, Instruction Manual

Page: 47 / 182

Connecting to External Devices DF-760E 43
The maximum load resistance for each is 1K Ohms and the analyzer provides a compliance
voltage of approximately 28 VDC for each.
J4 Pin # Moisture Signal Description
J4-8 GND Ground
J4-7 Key
J4-6 A Out + Analog Voltage Output (+)
J4-5 A Out - Analog Voltage Output (-)
J4-4 Unused
J4-3 Unused
J4-2 4-20 mA + 4-20 mA Output (+)
J4-1 4-20 mA - 4-20 mA Output (-)
Table 4: Pin-Out of Moisture Signal Output Connector J4
J4 Pin # Oxygen Signal Description
J10-8 GND Ground
J10-7 A OUT + Analog Voltage Output (+)
J10-6 A OUT - Analog Voltage Output (-)
J10-5 Key
J10-4 Unused
J10-3 Unused
J10-2 4-20 mA + 4-20 mA Output (+)
J10-1 4-20 mA - 4-20 mA Output (-)
Table 5: Pin-Out of Oxygen Signal Output Connector J10
6.4
Relay Ports – J2, J3, J8, J9
Eight form C (SPDT) relays (contact closures) are provided to assign to the various alarms.
The contacts are rated at 30 VDC, 1A resistive load. They are not designed to switch AC
power.
The relay contacts can be programmed through the user interface for up to four oxygen and
four moisture levels, temperature, electrolyte level/condition, moisture cell diagnostics,
loss of gas flow, zero calibration in progress, moisture analyzer off line, freeze of analog
outputs during calibration.
The relays are wired for Fail Safe operation such that a Normally Open (No alarm) contact
connects to common when an alarm occurs or when power to the instrument is lost.
Relays 1, 2, 3, and 4 are assignable to moisture signals and relays 5, 6, 7, and 8 are
assignable to oxygen signals.
The relay wiring can be tested with the Relay test routine found on page 110.