Total Number of Monitored Inputs: 15
(12 - contact inputs, ground referenced, numbered C1-C12)
(3 - opto-isolated voltage inputs, not ground referenced, numbered V1-V3)
Total Number of Controlled Outputs: 2
(2 - SPDT electromagnetic relay contacts (NO, NC, COM), numbered RL1 and RL2)
Screw Terminal Connectors: 8 connectors x 6 polls/connector (48 poles total), 3.50 mm pluggable screw-down connector, AWG 16-24, Molex P/N 39351-0006.
Relay contact load rating (RL1 or RL2): 1.5 Amp at 30 VDC
Maximum relay contact operating voltage (RL1-RL2): 30 VDC
Maximum relay contact operating current (RL1-RL2): 1.5 Amp
Maximum relay contact switching capacity (RL1-RL2): 62.5 VA, 33 W
Detection Method - Contact Inputs (C1-C12): Input transistor circuit detects external resistance between input and ground terminals. External resistances below 15K ohm produce a CLOSED condition/state. External resistances above 600K ohm produce an OPEN condition/state.
Input Resistance of Opto-isolated Voltage Inputs (V1-V3): 16K Ohm
Detection Method - Opto-isolated Voltage Inputs (V1-V3): Optical coupler detects voltage difference between V+ and V-. A voltage difference, on these terminals, below approximately 3 volts produces an OFF condition/state. A voltage difference, on these terminals, equal to or greater than approximately 3 volts produces an ON condition/state. The minimum recommended voltage input for an ON condition/state is dependent upon resistance of the voltage source.
Minimum Detectable Input Duration: 60 mS. This specification is not valid during a write to any variable in the SS6420’s non-volatile memory.
Maximum Time from State Change to Issue of Interrupt Packet: 300 mS. This specification is not valid during a write to any variable in the SS6420’s non-volatile memory.
Maximum Applied Voltage on Opto-isolated Voltage Inputs (V1-V3): 30 V
Power source: Port-powered (RTS and DTR, both asserted) or using an external AC-DC power adapter. To operate relay contacts, requires external power.
Power supply current drain: < 20 mA
External Power Source Connector: 2.1 mm jack
External Power Source Requirements: 6 VDC, 20 mA capability, center positive (input circuit is polarity protected). Recommended power adapter is P/N PA6106 or PA6206-XX.
Peripheral DC Power Source: for external peripheral devices
Peripheral Power Source Connector: 2.5 mm jack
Peripheral Power Source Requirements: Center negative (input circuit is polarity protected). The input DC voltage will depend on the requirements of peripheral devices that the customer is powering. The maximum input voltage allowed is 30 VDC. The maximum current that can be conducted is 0.75 Amp after which the internal overload protection will trigger. The overload protection is provided by a self-healing poly-fuse. This power source is made available through 12 polls of the screw terminal connectors. The recommended power adapter for powering security detectors is P/N PA6212-XX (12 VDC, 1.2 A).
Communications Interface: RS232C using TX,RX,RTS,DTR and GND. One device per serial port.
Communications Settings: 57600 bps, 8 bits, no parity and 1 stop bit
Communications Connector: 8 position modular jack, (accepts 8 position plug, RJ45)
Maximum communications cable length: 24 m (80 ft.) using recommended cable type. Low capacitance shielded cable or UTP is recommended
Firmware Version: 6.24
Communications Protocols: Sensorsoft Device Protocol (SSDP) Version 3.0 or Simple Text Command Interface (see User Manual for commands)
Communications Error Control: (SSDP only) 16 bit CRC (cyclic redundancy checking) for detection of communication errors between the device and host.
EEPROM: 2 Kbytes. Stores user defined input description and Boolean state strings
Number of Variables: 87
Maximum Length of Input Description String: 32 characters
Maximum Length of Boolean State String: 8 characters
Housing Dimensions: 7.5” (190.5 mm) x 2.8” (71.12 mm) x 1.3" (33.02 mm) (without terminal block plugs) (as of May 17, 2022)
Housing Material: sheet steel (as of May 17, 2022)
Housing Weight: 1.4 lbs (0.64 kg) (without terminal block plugs) (as of May 17, 2022)
Housing Color: Light Grey (RAL7035) (as of May 17, 2022)
Operating Temperature Range: -40 º C to +80 º C (-40 º F to +176 º F)
Operating Humidity Range: 90% or less, non-condensing