Bulkhead Adapters; Pump Power And Direction Control; Power Control Relay; Regulated Power Supply Carrier And 1-Stage Surge Protection - Xylem Ai1 Product Manual

3.9 Bulkhead Adapters

The Ai1 is designed with a wide variety of bulkhead adapters that allow easy expansion and customization of the Ai1
capabilities, in a simple to install design. The bulkhead adapters all use the M12 sensor connection system. Surge
protection is typically included with the bulkhead adapters, to protect the Ai1 from lightning induced surges on the
incoming lines. The bulkhead adapter includes a convenient earth point to provide the lowest resistance path to
earth to dissipate induced surges.

Pump Power and Direction Control

Provides high power pump control with reverse polarity for directional pumping. M12 connections are available on
two ports for increased current carrying capacity.
Intern (JST) Terminal
1: Red BAT
2: Black GND
3: Yellow FWD (SE1-6). Typ. A1
4: Green REV (SE1-6). Typ. A2
5: Blue GND (for higher powered pumps, in parallel to 2: Black)
6: White BAT (for higher powered pumps, in parallel to 1: Red)
(uses Analog main board header, modified for pins 5 & 6)

Power Control Relay

Provides high power control with three terminals (Normally Open, Normally Closed and Common) with switching
current up to 5A. Terminals NO and COM are doubled up for increased current carrying capacity. Uses low current
enable signal (can be driven using analog channels 1-6).
Intern (JST) Terminal
1: Red SW12 or BAT
2: Black GND
3: Yellow Enable (SE1-6). Typ A1
4: Green Not used
5: Blue Not used
(uses Analog main board header)

Regulated Power Supply Carrier and 1-Stage Surge Protection

Carries various regulated power supply boards for 3.3V, 5V, 24Vdc. Also may be used for 1-Stage surge protection,
with up to 3 user defined sensor connections.
Intern (JST) Terminal
1: Red 12V or SW12V
2: Black GND
3: Yellow User defined
4: Green User defined
5: Blue Enable Control
(uses either Analog or Digital main board header depending on user defined program requirements)

Latching Relay

Provides low power control with three terminals (Normally Open, Normally Closed and Common) with switching
current up to 1A. Terminals NO and COM are doubled up for increased current carrying capacity. Requires 30mA
enable signal when switching (requires Vx1 or Vx2).
Intern (JST) Terminal
1: Red 12V
2: Black GND
3: Yellow SET (Vx1)
4: Green RESET (Vx2)
5: Blue Not used
(future version uses Analog main board header when transistor circuit added)

Analog Input Expander (SDI12)

Allows the connection of up to 4 analog inputs measured using a single SDI12 bus. Multiple analog input expanders
may be added to the one Ai1 with each using a unique address to identify. Analog measurements are made using
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Connection
X
X
X
X
Connection
X
X
X
Connect. External (M12) Sensor
X 1: Brown
→
4: Black
→
2: White
→
5: Grey
→
3: Blue
Connection External (M12) Sensor
X 1: Brown
X 2: White
X 3: Blue
X 4: Black
X 5: Grey
External (M12) Sensor
1: Brown Pump +
2: White Pump +
3: Blue Pump -
4: Black Pump -
External (M12) Sensor
1: Brown NO
2: White NO
3: Blue COM
4: Black COM
5: Grey NC
Regulated Voltage Out
Ground
User defined
User defined
Enable Control
NO
NO
COM
COM
NC
Protection
-
-
-
-
Protection
-
-
-
-
-
Protection
1-Stage (TVS)
Earth lug
1-Stage (TVS)
1-Stage (TVS)
1-Stage (TVS)
Protection
-
-
-
-
-