Features
n Fits single or dual conduit ports
n Weatherproof
n Long life, high operational reliability
n Stainless steel construction
1669 Series – Transient Protector
Specifications are subject to change without notice.
The device characteristics and parameters in this data sheet can and do vary in different applications and actual device performance may vary over time.
Users should verify actual device performance in their specific applications.
Used for full weather protection of eld transmitters and instrumentation operating on 24-28 V systems, the 1669 Series protects
sensitive I/O circuitry from surges of any polarity or magnitude. Principal use is on 4-20 mA control loops and can be used on ground-
ed (+ or -) or ungrounded circuits. Able to survive and protect even from direct lightning strikes to the transmitter ground or eld
wiring. Automatic recovery after passage of the surge. Long life, high operational reliability.
Construction is hybrid 3-stage design, using a high surge capacity Balanced Trigard
®
Gas Tube protector, coordination impedance
and silicon suppressors to provide dierential and common mode protection with very low clamping levels for delicate loads. The
housing is thick walled schedule 40, type 303 stainless steel. Wiring is #20 (.5 mm
2
) 1000 V, PVC insulated. Solid red and black colors
are used for the input; striped colors signify the protected output. The protector ground wire (green) is electrically bonded to the
metallic housing; it is for connection to the grounding screw within the eld device. Use Model 1669-02/06 for standard ground
resistance conditions.
Use Model 1669-01 / 05 with higher voltage isolation to ground for sites with high resistance soil conditions or where signicant
ground potential dierences are known to exist.
Characteristics
Model 1669-01 Model 1669-02
Model 1669-05 Model 1669-06
Warranty ...................................................................................3 years ................................................. 3 years
Maximum Signal Voltage ..........................................................30 Vpk ................................................. 30 Vpk
DC Clamping Voltage
L-L .......................................................................................36 V ..................................................... 36 V
L-G ......................................................................................250 V ................................................... 36 V
Capacitance, 1 MHz, max
L-L .......................................................................................1200 pF ............................................... 2000 pF
L-G ......................................................................................40 pF ................................................... 2000 pF
Series Resistance, per line .......................................................22 Ω ..................................................... 22 Ω
Inductance, per line, max ........................................................1 µH ..................................................... 1 µH
DC Leakage, 24 Vdc, max ........................................................1 µA ..................................................... 1 µA
Impulse Clamping Voltage: L-L ................................................50 V ..................................................... 50 V
1 kA (L+L)-G, 10/1000 µs, 500 V/µs: L-G ..........................750 V ................................................... 70 V
Ambient Temperature Range, Storage .....................................-65 °C to +130 °C................................ -65 °C to +130 °C
Operating Temperature
Non-hazardous areas..........................................................-40 °C to +100 °C................................ -40 °C to +100 °C
Hazardous areas .................................................................-20 °C to + 55 °C................................. -20 °C to + 55 °C
Maximum Load Current ............................................................150 mA ................................................ 150 mA
- Except when limited for T5 conditions (.73 W ..................129 mA ................................................ 129 mA
Humidity ...................................................................................0 - 95 % Condensing .......................... 0 - 95 % Condensing
Altitude, Operating ...................................................................6,000 m ............................................... 6,000 m
Weight
1669-01 / 02 .......................................................................150 g ................................................... 150 g
1669-05 / 06 .......................................................................220 g ................................................... 220 g
Component Response Time .....................................................1 ns ...................................................... 1 ns
Surge Life (L+L)-G
20 kA 8/20 µs ......................................................................20 times ............................................... 20 times
1 kA 10/1000 µs ..................................................................1000 times ........................................... 1000 times
