General

Display: PD8-154: Four red LED channel indicators. PD8-158: Eight red LED channel indicators. One green LED power indicator.
Alarm Messages: Custom printed adhesive clear labels.
Area: PD154, 1.25" x .60" (32 mm x 15 mm), 4 messages PD158, 1.25" x .25" (32 mm x 6 mm), 8 messages
User specified size and length, up to 4 lines (PD154) or 2 lines (PD158) of 14 characters of size 9 pt fonts.
Programming Methods: Rear 4-position switch for sequence selection and horn operation. Three SafeTouch through-glass buttons for NO/NC input selection, sequence option, and operation when cover is installed. Three internal pushbuttons when cover is removed.
Audible Alarm: 85 dB internal horn. The use of an external explosion-proof horn is recommended due to the internal horn's audibility being dampened by the explosion-proof enclosure.
Noise Filter: 40 ms debounce on inputs and external push buttons.
Shared First-Out Systems: 1 ms unit-to-unit delay. Maximum of 200 units in the shared first-out system.
Non-Volatile Memory: All programmed settings are stored in non-volatile memory for a minimum of ten years if power is lost.
Power Options: 85-265 VAC, 50/60 Hz; 90-265 VDC, 20 W max; or 12-36 VDC, 12-24 VAC, 6 W max.
Fuse: Required external fuse: UL Recognized, 5 A max, slow blow. Up to 6 annunciators may share one 5 A fuse
Isolated Power Supply: 24 VDC ± 10% @ 200 mA max Standard on 85-265 VAC powered units only.
Isolation: 4 kV input/output-to-power line.
Overvoltage Category: Installation Overvoltage Category II: Local level with smaller transient overvoltages than Installation Overvoltage Category III.
Environmental: T6 Class operating temperature range Ta = -40 to 60°C
T5 Class operating temperature range Ta = -40 to 65°C
Connections: Removable screw terminal blocks accept 12 to 22 AWG wire.
Enclosure: Explosion-proof die cast aluminum with glass window, corrosion resistant epoxy coating, color: blue. NEMA 4X, 7, & 9, IP68. Default conduit connections: Four ¾" NPT threaded conduit openings and two ¾" NPT metal conduit plugs with 12 mm hex key fitting installed. Additional conduit opening configurations may be available; verify quantity and sizes on specific device labeling during installation.
Mounting: Four slotted flanges for wall mounting or NPS 1½" to 2½" or DN 40 to 65 mm pipe mounting.
Overall Dimensions: 6.42" x 7.97" x 8.47" (W x H x D) (163 mm x 202 mm x 215 mm)
Weight: 16.0 lbs (7.26 kg)
Warranty: 3 years parts & labor

Inputs

Input Types: NO or NC switches: No external excitation required.
Open collector transistor: Open circuit voltage approx. 3.3 VDC.
Logic Levels: LOW = 0 to 0.9 VDC, HIGH = 2.4 to 28 VDC
Update Rate: 41 ms following alarm state; 1 ms for alarm state clear.
Sequences: Input follower, ISA Sequences A, F1A, F2A, F3A, M, F1M, and F3M per ISA Standard ISA-18.1-1979 R2004.
Sequence Options: A, F1A, F2A, F3A, M, F1M, F2M, and input follower with selectable options -1 (silence push button), -4 (no lock-in), and -6 (no horn) per ISA Standard ISA-18.1-1979 R2004

Relays

Rating: 2 SPDT (Form C); rated 3 A @ 30 VDC or 3A @ 250 VAC resistive load; 1/14 HP @ 125/250 VAC for inductive loads.
Electrical Noise Suppression: A suppressor (snubber) should be connected to each relay contact switching inductive loads to prevent disruption to the microprocessor's operation. Recommended suppressor value: 0.01 µF/470 Ω, 250 VAC (PDX6901).
Relay Operation: Relay 1: Alarm state until alarm is acknowledged. Relay 2: Alarm state if any channel indicating alarm condition.
Fail-Safe Operation: Programmable independent for each relay.
Note: In fail-safe mode, relay coil is energized in non-alarm condition. In case of power failure, relay will go to alarm state.

Product Ratings and Approvals

FM Enclosure: Type 4X; IP66
   Class I, Division 1, Groups B, C, D
   Class II, Division 1, Groups E, F, G
   Class III, Division 1, T5/T6
   Class I, Zone 1, AEx d, IIC Gb T5/T6
   Zone 21, AEx tb IIIC T90°C; Ta -40°C to +65°C
   T6 Ta = -40°C to +60°C; T5 Ta = -40°C to +65°C
   Certificate Number: 3047283
CSA: Class I, Division 1, Groups B, C, D
   Class II, Division 1, Groups E, F, G
   Class III, Division 1
   Class I Zone 1 Ex d IIC
   Zone 21 Ex tb IIIC T90°C
   -40°C < Tamb. < +60° C; Temperature Code T6
   -40°C < Tamb. < +65° C; Temperature Code T5
   Enclosure Type 4X & IP66
   Certificate Number: 2531731
ATEX: II 2 G D    Ex d IIC T* Gb
   Ex tb IIIC T90°C Db IP68
   Ta = -40°C to +*°C
   *T6 = -40°C to +60°C
   *T5 = -40°C to +65°C
   Certificate number: Sira 12ATEX1182
IECEx: Ex d IIC T* Gb
   Ex tb IIIC T90°C Db IP68
   Ta = -40°C to +*°C
   *T6 = -40°C to +60°C
   *T5 = -40°C to +65°C
   Certificate Number: IECEx SIR 12.0073