Alarm And Control Relay Connections; Alarm And Control Relay Connector Pinout Table - DPS Telecom NetGuardian 420 DNP3 Hardware User Manual

Alarm and Control Relay Connections

5.6
Alarm and control relay connectors (*Optional Analog Connector Shown)
The NetGuardian 420's discrete alarm inputs, control relay outputs are connected through the 50-pin connectors
labeled "Discretes 1–20/ Relays 1–4" on the back panel. Analog alarm inputs 1 and 2 are connected through the
four-pin analog connector.
Note: Analog alarms are a build option for the NetGuardian 420. Your NetGuardian 420 may not have analog
inputs.
5.6.1

Alarm and Control Relay Connector Pinout Table

Discretes 1–25
RTN ALM
ALM 1 1 26
ALM 2 2 27
ALM 3 3 28
ALM 4 4 29
ALM 5 5 30
ALM 6 6 31
ALM 7 7 32
ALM 8 8 33
ALM 9 9 34
ALM 10 10 35
ALM 11 11 36
ALM 12 12 37
ADC
Above, you'll see pinouts for the 50-pin connector "Discretes 1–20 / Relays 1–4," and the pinout for the four-pin
connector "Analogs 1–2."
*You can set your NetGuardian's control relays 3 and 4 for either Normally Open or Normally Closed operation
via a jumper on the NetGuardian PC board. By default, relays 3 and 4 are configured for Normally Open
operation. For more information, see the Controls section of this manual.
RTN ALM
ALM 13 13 38
ALM 14 14 39
ALM 15 15 40
ALM 16 16 41
ALM 17 17 42
ALM 18 18 43
ALM 19 19 44
ALM 20 20 45
Analogs 1–2
– +
1 1– 1+
2 2– 2+
Alarm and control relay connector pinout for the 420
Control Relays 1–4
NO NC
CTRL 1 21 46
CTRL 2 23 48
*CTRL 3 49 49
*CTRL 4 50 50
9
CO
47
22
24
25