2
Signet 8250-2 Level Transmitter
Terminals 5-10: Relay Outputs
Two sets mechanical SPDT contacts programmable as:
• High or Low setpoint with adjustable hysteresis
• "Window" limits with adjustable hysteresis
• Time delay up to 6400 seconds.
• May be disabled (Off) if not used.
• Auxiliary power (terminals 1-2) MUST be connected
for relay operation
Terminals 1 and 2: AUXILIARY power
Required for all systems that include relay
operation.
4
3
2
1
13
12
11
10
9
8
7
6
5
AUX
Power +
Sensr Gnd
(SHIELD)
Sensr IN
(RED)
Sensr V+
(BLACK)
Relay 2
(NO)
Relay 2
(COM)
Relay 2
(NC)
Relay 1
(NO)
Relay 1
(COM)
Relay 1
(NC)
System Pwr
Loop -
System Pwr
Loop +
AUX
Power -
3. Panel
Installation
1. The panel mount transmitter is designed for installation using a 1/4 DIN Punch. For
manual panel cutout, an adhesive template is provided as an installation guide. The
cutout must be 92 mm x 92 mm. Recommended clearance on all sides between
instruments is 25 mm (1 in.)
2. Slide the instrument into the cutout from the front of the panel.
3. Slide the mounting bracket over back of instrument until quick-clips snap into latches on
side of instrument.
4. To remove, secure instrument temporarily with tape from front or grip from rear of
instrument. DO NOT RELEASE.
5. Press quick-clips outward and remove.
2
1
Terminals 11-13: Digital (S
3
L)
The 2450 sensor and External Relay
Module connect here.
System Pwr
Loop -
System Pwr
Loop +
2
1
Sensr Gnd
(SHIELD)
Sensr IN
(RED)
Sensr V+
(BLACK)
7
6
5
4
3
AUX
Power -
AUX
Power +
13
12
11
Relay 2
(NO)
Relay 2
(NC)
10
9
8
Relay 2
(COM)
Relay 1
(NO)
Relay 1
(NC)
Relay 1
(COM)
quick-clips
gasket
panel
terminals
mounting
bracket
latch
Panel Mount
Installation Detail
4. Electrical
Connections
CAUTION:
Failure to fully open terminal jaws before removing wire may permanently damage instrument.
Wiring Procedure
1. Remove 13 mm - 16 mm (0.5 in. - 0.625 in.) of insulation from wire end.
2. Press the orange terminal lever downward with a small screwdriver to open terminal jaws.
3. Insert exposed (non-insulated) wire end in terminal hole until it bottoms out.
4. Release orange terminal lever to secure wire in place. Gently pull on each wire to ensure a good connection.
Wiring Removal Procedure
1. Press the orange terminal lever downward with a small screwdriver to open terminal jaws.
2. When fully open, remove wire from terminal.
Terminals 3 and 4: Loop Power
12-24 VDC ±10% system power
and current loop output.
Max. loop impedance:
50
Ω
max. @ 12 V
325
Ω
max. @ 18 V
600
Ω
max. @ 24 V
