Sens MicroGenius S2 - AC Connection; Alarm Connections

SENS MicroGenius S2/S4 Technical Manual
17
6.4. AC Connection
This unit is permanently connected to the AC circuit and to the battery. For models not equipped with an
AC input breaker, an external disconnect device must be located in the AC input to the charger. The
charger is rated to operate on any AC input within the range of 90-265VAC, 47-63Hz.
Ensure that the AC input supply is de-energized. Connect the AC line and neutral conductors to the AC
input terminal block/breaker in the charger (see Figures 1-3). If there is an identified grounded circuit
conductor (neutral), attach it to the terminal marked “L2/N.” Tighten connections to torque specified in
Table 5. Route AC wiring at least ¼ inch (6 mm) away from DC wiring, alarm wiring, and the circuit board.
Table 5 – AC Allowed Wire Gauge and Torque Requirements
Charger Model
Connection Type
Allowed Wire Gauge
Required Torque
Tool
S2
Terminal Block
20-6 AWG (0.5-13.5 mm
2
)
10.5 In-Lb (1.2 Nm)
Phillips P2
S4
Breaker
14-2 AWG (2.5-35 mm
2
)
43 In-Lb (4.9 Nm)
5/16 inch flat-head
S4 Terminal Block
14-2 AWG (2.5-35 mm
2
)
#3-#2: 50 In-
Lb (5.6 Nm)
#6-4: 45 In-Lb (5.1 Nm)
#8: 40 In-Lb (4.5 Nm)
#14-#10: 35 In-Lb (4.0 Nm)
1/4 inch flat-head
Table 6 – AC Input Current and Breaker Rating
Charger Rated
Output Current
(Amps)
AC Input
Current
(Amps)
Optional AC
Breaker Rating
(Amps)
15
4
15
20
8
15
25
8
15
30
8
15
35
12
15
45
12
15
50
16
20
60
16
20
6.5. Alarm Connections
See charger inside cover label for original factory alarm relay assignments (see Figure 5). Alarm relay
assignments are custom configurable using the front panel keypad (based on application) or the SENS
Setup Utility. Connect alarm wiring to the respective terminals on the pluggable terminal block in the
charger (see Figures 1-3 for location in charger and Figure 6 for detail). To make wiring easier, the
terminal block unplugs from the header. Pull terminal block straight out from header to remove. Connect
wires to terminal block by tightening screws at each position. After wires are connected, plug terminal
block securely back into header. Wire from FAIL or OK to COM depending on whether the alarm should
be present on an open or closed circuit (see Tables 7-9). Connect alarm terminals only to low voltage,
limited energy (“Class 2”) circuits. Alarm circuits are rated 2A at 30V AC or DC. The terminals accept 28-
16 AWG (0.08-1.5 mm
2
) conductors. Tighten connections to 2.0 Lb-In (0.22 Nm) using a small slotted
driver. Route alarm wiring at least ¼ inch (6 mm) away from DC wiring, AC wiring, and the circuit board.
Relays will change state for an alarm on any output on chargers with multiple outputs.